Exams

Multiple Choice Questions (MCQs)
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PHYSICS

WAVE MOTION

1) The unit of spring constant is
a):No unit
b):Newton
c):Newton meter
d):Newton per meter

2) An external force acting on a spring is ____ to increase in its length
a):Equal
b):Directly proportional
c):Inversely proportional
d):None of all

3) In a simple harmonic motion, acceleration of the body is _____ to the displacement from the mean position
a):Equal
b):Directly proportional
c):Inversely proportional
d):none of all

4) In simple harmonic motion, a body vibrates about__
a):Equilibrium position
b):Extreme position
c):Center
d):None

5) In simple harmonic motion velocity of a body is ____ at extreme position
a):Minimum
b):Maximum
c):Double to that of mean position
d):Equal to acceleration of body

6) If length of a simple pendulum is made four times then the time period becomes
a):Half
b):Double
c):Triple
d):Four times

7) If mass of a body attached to a spring is made one fourth, then the time period becomes
a):Half
b):Double
c):Triple
d):Four times

8) By increasing the value of time period, the value of π ___
a):Also increases
b):Decreases
c):Never changes
d):None

9) The types of waves which require medium for their propagation are called
a):Mechanical waves
b):Electromagnetic waves
c):Surface waves
d):Sky waves

10) The distance between two consecutive troughs or crests is called
a):Frequency
b):Time period
c):Wave length
d):Node


11) The number of waves passing through a point in one second is called
a):Frequency
b):Time period
c):Wave length
d):Node

12) The relation between frequency of a wave and its time period is given by the equation
a):f=2T
b):f=1/2T
c):f=T/2
d):f=1/T

13) The relation between velocity, frequency and wavelength of a wave is given by
a):v=fλ
b):f=vλ
c):λ=f/2 v
d):None

14) By increasing frequency of a wave, the velocity of the wave at a constant wavelength
a):Increases
b):Decreases
c):Remains constant
d):Becomes double

15) Turning back of waves into the same medium after striking a surface is called
a):Reflection
b):Refraction
c):Diffraction
d):Interference

16) Two identical waves passing through a medium in opposite direction along a same line, produces
a): constructive interference
b): destructive interference
c): stationary waves
d): none
17) At second harmonic, the frequency of wave is found to be ____ of fundamental frequency
a): Twice
b): Thrice
c): Half
d): Four times

18) The frequency at which a stationary wave makes only one loop is called
a): First harmonic
b): Second harmonic
c): Third harmonic
d): Fourth harmonic

19) In terms of wavelength the distance between two nodes or antinodes is
a): One wavelength
b): Half wavelength
c): One quarter of wavelength
d):Two wavelength



SOUND

20) When amplitude of a vibrating body increased, sound becomes
a):Louder
b): Fainter
c): Unaffected
d):None

21) Sound level in decibels for any unknown intensity I which is 10 times greater than intensity Io of faintest audible sound, is given by the relation
a):10 log(I х Io)
b): log I/Io
c):10 log I/Io
d):none

22) Sound level for average whisper is
a):10dB
b):20dB
c):50dB
d):100dB

23) The characteristics of sound by which two sounds of same loudness can be distinguished is called
a):Pitch
b):Intensity
c):Noise
d):Quality

24) Distance between node and antinode is equal to ____ of wavelength
a):one half
b):one third
c): one fourth
d):double

SPHERICAL MIRRORS AND LENSES

25) The center of a mirror is called
a):Center of curvature
b):Pole
c):Focus
d):None

26) Aperture is
a): Distance from focus to pole
b): Distance from pole to center of curvature
c): Twice the distance from pole to center of curvature
d): Distance from object to pole

27) Radius of curvature of a spherical mirror is
a):equal to its focal length
b): twice the focal length
c):half of focal length
d):four times of focal length

28) If distance of the object from the mirror is denoted by p and that of image by q and focal length by f, then relation between f, p and q would be
a):1/p= 1/f+1/q
b):1/p=1/f-1/q
c): 1/q=1/f+1/p
d):p/f=1+1/q

29) ________ are used in motorcycles and automobiles which enable the driver to see the automobile coming behind them
a):Concave mirror
b):Convex mirror
c):Concave lens
d):Convex lens

30) If a ray of light passes from one particular medium to another, then the ratio of sine of incidence angle to sine of refracted angle for that medium
a): Changes from time to time
b): Depends upon size of medium
c): Always remain constant for a particular medium
d): None


31) Refractive index of glass with respect to air is
a):speed of light in glass x speed of light in air
b):speed of light in glass/ speed of light in air
c): speed of light in air/ speed of light in glass
d):none

32) Refractive index for soda lime glass is 1.5, this means in glass light travels at _____ times the speed of light in vacuum.
a):1.5
b):0.67
c):3
d):2

33) Relation between real and apparent depth of the water is
a):Refractive index= real depth/apparent depth
b):Refractive index= apparent depth/ real depth
c):Refractive index=real depth x apparent depth
d):None

34) If apparent depth of a swimming pool is 1.5m and real depth is 2m then refractive index of water is
a):3
b):0.75
c):1.33
d):none

35) Unit of refractive index is
a):Meter square
b):Per meter
c):Per meter square
d):No unit

36) The angle of incidence in the denser medium for which corresponding angle of refraction is ____ degrees in the rare medium, is called critical angle
a):45
b):60
c):90
d):180

37) When the value of the angle of incidence becomes greater than the critical angle then the ray__
a):Passes through second medium without changing path
b):Enters into second medium at an angle of 45 degrees
c):Does not enter into second medium and is totally reflected back
d):None

38) If A is angle of prism and Dm is the angle of minimum deviation then refractive index n would be
a): sin(A/2)/sin(A+Dm)
b):sin(A+Dm)/2) / sin( A)
c): sin (A+Dm)/ Sin (A/2)
d): Sin ((A+Dm)/2) / sin (A/2)


39) A totally reflecting prism is that which has one of its angle equal to 90 degree and each of the remaining two angles equal to ___degrees
a):30
b):45
c):60
d):90

40) A total internal reflection takes place when the incidence angle of a ray is _____critical angle
a):Greater than
b):Smaller than
c):Equal to
d):None

41) The type of endoscope which is used to examine liver is called
a): Bronchoscope
b):Cystoscope
c): Gastroscope
d): Stroboscope

42) Rainbow is a solar spectrum produced due to the ____ of light
a):Reflection
b):Diffraction
c):Interference
d):Dispersion

43) The order of color in primary rainbow is: red, orange,___,___,___, indigo, violet
a):yellow, green, blue
b):green, blue, yellow
c): yellow, blue, green
d):none

44) Rays of light passing through a convex lens near to its axis are called
a):Marginal rays
b):Paraxial rays
c):Coherent Rays
d):None

45) If focal length is measured in meter then power of lens is measured in __
a):Meter square
b):Meter
c):Dioptres
d):Lens

46) If the image is virtual then its distance from lens is taken
a):Positive
b):Negative
c):Double
d):Half


ELECTROSTATICS

47) Basically electric charges are of ___types
a):Two
b):Three
c):Four
d):Five
48) The instrument used to detect and test the nature of charge on a body is called
a): stethoscope
b): electroscope
c): endoscope
d): stroboscope

49) The coulomb's force between two charged bodies is directly proportional to the ____ of quantity of charges on them
a):Addition
b):Subtraction
c):Division
d):Product

50) The unit of force is Newton, while the unit of coulomb's force is
a): coulomb
b): Newton
c): coulomb/meter
d): no unit

51) If the quantity of charge is doubled, the coulomb's force becomes
a): double
b): three times
c): four times
d): half

52) If the distance between charged bodies is made four times, the coulomb's force becomes
a): 4 times
b): 16 times
c): 1/4 times
d): 1/16 times

53) In coulomb's force, the constant k has value
a): 10 Х 10¹⁰ Nm2C-2
b): 9 Х 9⁹ Nm²C^-2
c): 10 Х 10⁹ Nm²C^-2
d): 9 Х 10⁹ Nm²C^-2

54) Electric lines of forces emerge from
a): positive charge
b): negative charge
c): both positive and negative
d): none

55) The ability of a conductor to store charge is called
a): capacitance
b): induction
c): resistance
d): conductance

56) The equivalent capacitance in series combination is always ____ the individual capacitance
a): equal to
b): greater than
c): lesser than
d): none

57) The equivalent capacitance in parallel combination is always ___ the individual capacitance
a): equal to
b): greater than
c): lesser than
d): none



CURRENT ELECTRICITY

58) Unit of electric current is
a): volt
b): ampere
c): coulomb
d): no unit

59) If 2C charge passes through a surface in 1 s then the current flowing will be
a): 2A
b): 0 A
c): 1 A
d): 0.5 A

60) The flow of current is due to
a): nucleus
b): protons
c): neutrons
d): free electrons

61) The amount of energy supplied by battery in pushing one coulomb charge from its positive terminal to its negative terminal through the battery is called
a): electromotive force
b): electric potential
c): Resistance
d): Coulomb's force

62) Opposition to flow of current is called
a): electromotive force
b): electric potential
c): Resistance
d): Coulomb's force

63) If temperature of a conductor increases, its resistance
a): increases
b): decreases
c): no change
d):none

64) The unit of resistance is
a): no unit
b): ampere
c): ohm
d): volt

65) The unit of specific resistance is
a): ohm
b): ohm meter
c): ohm per meter
d): meter

66) The rate of increase in resistance per ohm per Kelvin is denoted by
a): α
b): Ω
c): ß
d): έ

67) Equivalent resistance in series combination of two resistors is always ____ each of individual resistor.
a): greater than
b): smaller than
c): equal to
d): none




68) In ammeter a shunt resistance is connected in ___ with the galvanometer
a): series
b): parallel


69) If a current of 2A flows for the time 0.5s between two points, then ____coulomb of charge will flow
a): 1
b): 4
c): 0.25
d):0.5


70) Voltmeter is always connected in ___ with the resistance across which the potential difference is to be measured
a): series
b): parallel


71) When (I) current flows for time (t) seconds through a resistor of resistance (R) then the energy gained during (t) seconds is
a): IR²t
b): I²Rt
c): IRt
d): IRt²

72) The amount of energy supplied by current in unit time is known as
a): Kinetic Energy
b): heat energy
c): electrical energy
d): mechanical energy

73) The electrical power for current I passing through a resistor of resistance R is defined by the formula as
a): I²R
b): IR²
c): I/R
d): IR

74) The relation between electrical power (P) and electric energy (W) is given by the relation
a): W=P
b): W=P/t
c): W=P2t
d): W=Pt

75) The electric power (P) in terms of voltage (V) and current (I) is
a): PV=I
b):PI=V
c): P=VI
d): 2P=VI

76) 1 kilowatt hour is equal to
a):3.6 MJ
b): 2.6 MJ
c): 1000 MJ
d): 360 Х 10⁵ MJ


77) Fuse is
a): connected in series with neutral wire
b): connected in series with live wire
c): connected with earth wire
d): connected in parallel with live wire



ELECTROMAGNETISM

78) The magnetic lines of forces produced due to current passing through a straight conductor is in _____ form
a): circular
b): elliptical
c): rectangular
d): triangular

79) The force on current carrying conductor placed at right angle in a magnetic field is
a): in the same direction as current
b): in the opposite direction to that of current
c): perpendicular to both the direction of current and magnetic field
d): in the same direction as of magnetic field

80) A D.C motor converts ______ energy into _____ energy
a): mechanical, electrical
b): electrical, mechanical
c): kinetic, potential
d): potential, kinetic

81) The value of induced emf is directly proportional to the rate of change of flux, this is known as
a): lens' law
b): faraday's law
c): coulomb's law
d): Fleming's rule

82) If a current is induced in a circuit due to the change of current in another circuit is known as
a): self induction
b): mutual induction
c): magnetic flux
d): none

83) A transformer has 100 turns in its primary and 500 turns in the secondary. If a 6V DC is applied across its primary, the voltage induced across its secondary would be
a): 0V
b): 30V
c): 45V
d): 60V

84) Transformer works on the principle of
a): self induction
b); mutual induction
c): conductance
d): capacitance

ATOMIC AND NUCLEAR PHYSICS

85) Central part of an atom is called
a): neutron
b): electron
c): nucleus
d): proton

86) A nucleon is nearly ___ times heavier than an electron
a): 1236
b): 1836
c): 2036
d): 36

87) Elements having same atomic number but different atomic mass are called
a): nucleons
b): isotopes
c): protons
d): neutron



88) Natural process of breaking of elements is called
a): fission reaction
b): fusion reaction
c): half life
d): radioactivity

89) Radio isotopes are those radioactive elements whose atomic mass is _____ but atomic number is ____
a): same, different
b): different, same
c): greater than 82, less than 82
d): none

90) Uranium salt emits radiations
a): in the presence of sun light only
b): in the absence of sun light only
c): no matter whether sun light is present or not
d): none

91) Speed of all α rays emitted by one element is
a): same
b): different
c): varies in the range 1.4 Х 10⁷ to 1.8 Х 10⁷ ms^-1
d): none

92) α rays passing through a gas produces
a): evaporation
b): ionization
c): excitation
d):none

93) α particles are in fact nuclei of
a): hydrogen
b): helium
c): boron
d): carbon

94) An α particle contains
a): One proton
b): Three neutrons
c): two electrons
d): both a and b


95) The speed of all the ß rays emitted by one element is
a): same
b): different
c): always constant
d): none

96) The mass and charge of β rays is equal to the mass and charge of
a): electron
b): proton
c): neutron
d): none

97) Gamma rays are
a): mechanical waves
b): electromagnetic waves
c): transverse waves
d): none


98) Due to radioactive decay, the atomic mass number of the newly produced element _____ but its charge number ____ by one unit
a): changes, increases
b): is same, increases
c): changes, decreases
d): is same, decreases

99) The half life of an element is that time during which the number of atoms of that element are reduced to
a): one third
b): one fourth
c): one half
d): one sixth

100) If half life of an element is T then after time 2T the number of atoms remains are
a): 75 %
b): 50 %
c): 25%
d): 0

101) Speed of light is equal to
a): 3 Х 10⁸ ms
b): 9 Х10⁹ ms-1
c): 3 Х 10⁸ ms^-1
d): 6.67 Х 10¹¹

102) If mass of a body is 10 kg, then the energy produced by it to completely change into energy would be
a): 3 Х 10⁹ ms-1
b): 3 Х 10⁹ J
c): 3 Х 10⁸ J
d): 3 Х 10⁸ ms-1

103) Breaking of a nucleus into two parts with the release of large amount of energy is called
a): fusion reaction
b): fission reaction
c): radioactivity
d): half life

104) A reaction in which a few small nuclei form a heavy nucleus is called
a): fission reaction
b): fusion reaction
c): radioactivity
d): none

ELECTRONICS

105) Germanium and silicon belongs to _____ group of periodic table
a): second
b): third
c): fourth
d): fifth

106) In silicon the number of valance electrons are
a): 3
b): 4
c): 5
d): 6

107) If outermost shell of an atom have ___ electrons, then it represent stable configuration.
a): 6
b): 7
c): 8
d): 0



108) Amongst time, modern telephone system, distance and pressure: _____ is digital quantity
a): time
b): modern telephone system
c): distance
d): pressure

109) The circuit which converts analogue signals into digital signals is called
a): rectifier
b): transistor
c): ADC
d): DAC

110) The type of chemical bond present in germanium is
a): covalent bond
b): ionic bond
c): metallic bond
d): none

111) Antimony belongs to ____ group of periodic table
a): third
b): fourth
c): fifth
d): sixth

112) The device that converts A.C to D.C is calle
a): ADC
b): DAC
c): rectifier
d): converter

113) If for input A=0 and input B=1, the output C=1, then it represents
a): AND logic
b): NAND logic
c): NOR logic
d): NOT logic

114) In NOR logic, output is maximum when first input is ____ and second input is _____
a): minimum, maximum
b): minimum, minimum
c): maximum, minimum
d): maximum, maximum

115) Output in AND logic is higher when input A and input B is equal to
a): A=0, B=0
b): A=1, B=1
c): A=1, B=0
d): A=0, B=1

INFORMATION TECHNOLOGY

116) Inventor of Radio is
a): Alfred Nobel
b): Faraday
c):Marconi
d): Graham bell

117) In computer sciences, CPU stands for
a): Cambridge University Press
b): Central programming unit
c): Central processing unit
d): Central Planning Unit

Biology

1. Bamboo is a
a): Herb
b): Grass
c): Shrub
d):Tree

 2. ATP is
a): An enzyme
b): A hormone
c): A protein
d): A molecule containing high energy bonds

 3. Edible part of tomato is
a): Endocarp
b): Fleshy thalamus
c): Mesocrap
d): Whole fruit

 4. The earliest organism that appeared on the surface of the earth were probably 
a): Autotrophs
b): Symbionts
c): Heterotrophs
d): None of above

5. The primary producers of organic matter in nature are 
a): Bacteria
b): Fish
c): Green plants
d): Human beings

6. All of the following are examples of ‘berry’ type of fruit, except 
a): Lady’s finger
b): Banana
c): Grape
d): Tomato

7. Of the total weight of a cell in a leaf or a petal, water constitutes about 
a): 60%
b): 70%
c): 75%
d): 90%

8. Opium is obtained from 
a): Poppy leaves
b): Latex juice
c): Tablet type latex
d): Seed capsule of opium poppy

9. Osmosis is a function of which of the following factors 
a): The number of solute molecules in the solutions on the two sides of the selectively permeable membrane b): Pressure
c): Temperature
d): All of the above

10. The rice grain is 
a): A seed
b): One seeded fruit
c): Many seeded fruit
d): Multiple seeded fruit

11. Which of the following is/are required during photosynthesis process in addition to sunlight and water 
a): Oxygen and Nitrogen
b): Carbon dioxide
c): Hydrogen and Carbon dioxide
d): Nitrogen

12. Which of the following statements in regard to plant growth and development is not true 
a): In unicellular organisms growth involves decrease in volume and number of organelles
b): The life of a flowering plant begins with the fertilized egg
c): Increase in protoplasm leads to an irreversible increase in size and weight
d): All cells result from the division of previously existing cells

13. Which of the following controls the reflex action in the body? 
a): Central nervous system
b): Motor nerves
c): Sensory nerves
d): Sympathetic nervous system

14. Which of the following diseases is caused by Plasmodium Vivax? 
a): Benign tertian malaria
b): Malignant tertian malaria
c): Quartan malaria
d): Yellow fever

15. The compound eye of insect produces 
a): Binocular vision
b): Monocular vision
c): Mosaic vision
d): None of the above

16. The heart beat is initiated and regulated by nodal tissue made of specialized cardiac muscles 
       called 
a): Alveolar tissue
b): Purkinje tissue
c): Spongy tissue
d): None of the above

17. Who discovered the blood groups of man 
a): Edward Jenner
b): Larven
c): Kari Landsteiner
d): William Harvey

18. The important function ordinary cat of perspiration 
a): Get rid of the body wastes
b): Regulate the body temperature
c): Regulate the body water supply
d): Lubricate the epithelial tissue

19. The main function of white blood cells in the body is to 
a): Carry oxygen
b): Help in clot formation
c): Produce more red cells
d): Protect the body against diseases

20. Enzymes differ from ordinary catalysts in 
a): That they are non proteins
b): That they are produced outside the living cells
c): That they are proteins
d): None of the above

21. DNA model was given by 
a): Beadle and Talum
b): Fisher and Haldane
c): Lederberg and Talum
d): Watson and Crick

22. The number of chromosomes in the human body is 
a): 42
b): 44
c): 46
d): 48

23. Nobel prize for decoding and projecting the genetic code was given to 
a): Dr Abdus Salam
b): Watson and Crick
c): Strasburger
d): None of the above

24. The theory of inheritance of acquired character was propounded by: 
a): Charles Darwin
b): Gregor Mendl
c): J.B. Lamarck
d): Weismann