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Question no 1:

 

Q.1 Nuclei having the same mass number but different atomic number are____________?

A) Isotopes
B) Isomers
C) Isobars
D) Isotones

Question no 2:

 

Q.2 In case of a simple pendulum, the cause of damping is__________________?

A) None of these
B) Drag force of air
C) Tension in the string
D) Gravity

Question no 3:

 

Q.3 Which one is a unit vector ?

A) Both B and C are correct
B) ??3 i^ + ??3 j^ + ??3 k^
C) 1/??3 i^ + 1/??3 j^ +1/ ??3 k^
D) ??3 / 3 i^ + ??3 / 3 j^ + ??3 / 3 k^

Question no 4:

 

Q.4 An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil the applied voltage leads the current by 45Ω. What is the inductance of the coil ?

A) 20mH
B) 16mH
C) 12mH
D) 10mH

Question no 5:

 

Q.5 Addition of vector obeys_____________?

A) Associative law
B) Commutative law
C) All given laws in A, B and C
D) Distributive law

Question no 6:

 

Q.6 Which one of the following has the largest energy content ?

A) 106 photons of wavelength 50?m (infrared)
B) 106 photons of wavelength 200nm (UV)
C) 103 photons of wavelength 2 pm (γ-rays)
D) 102 photons of wavelength 1nm (x-rays)

Question no 7:

 

Q.7 How many main frontiers of fundamental science ?

A) 4
B) 1
C) 3
D) 2

Question no 8:

 

Q.8 Momentum depends upon__________________?

A) velocity of the body
B) both mass and velocity of the body
C) mass of the body
D) force acts on the body

Question no 9:

 

Q.9 The SI unit of force constant is identical with that of__________________?

A) Pressure
B) Surface tension
C) Force
D) Loudness

Question no 10:

 

Q.10 A photon is________________?

A) A quantum of electromagnetic radiation
B) A unit of energy
C) A positively charged particle
D) A unit of wavelength

Question no 11:

 

Q.11 Semi-conductor germanium and silicon are_________________?

A) trivalent
B) tetravalent
C) pentavalent
D) divalent

Question no 12:

 

Q.12 Radioactive materials can be identified by measuring their_______________?

A) Density
B) Mass
C) Hardness
D) Half life

Question no 13:

 

Q.13 Which one of the following is not a donor impurity ?

A) aluminium
B) arsenic
C) antimony
D) phosphorus

Question no 14:

 

Q.14 Who discovered the inverse square law for gravity ?

A) Galileo
B) Einstein
C) Newtons
D) Plank

Question no 15:

 

Q.15 The relationship between Tesla and smaller unit Gauss of magnetic induction is given by_________________?

A) 1T = 10-2 G
B) 1T = 104 G
C) 1T = 10-4 G
D) 1T = 103 G

Question no 16:

 

Q.16 The dimensions of the coefficient of viscosity are_____________?

A) ML-1T-1
B) ML1T-1
C) M2L-1T-1
D) M2L1T1

Question no 17:

 

Q.17 A completely filled band is called__________________?

A) Forbidden band
B) Core band
C) Valence band
D) Conduction band

Question no 18:

 

Q.18 When a body moves in a circle of radius r with linear speed V its centripetal force is_______________?

A) mV/r2
B) mV2/r2
C) mV2/r
D) mV/r

Question no 19:

 

Q.19 2nd law of motion gives the definition of________________?

A) acceleration
B) both force and acceleration
C) velocity
D) force

Question no 20:

 

Q.20 Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?

A) Beats phenomena
B) All of these
C) Interference of waves
D) Dopplers effect

Question no 21:

 

Q.21 The waveform of S.H.M. is________________?

A) Standing wave
B) None
C) Sine wave
D) Square wave

Question no 22:

 

Q.22 Which branch of science plays an important role in engineering?

A) Biology
B) Chemistry
C) Physics
D) All of these

Question no 23:

 

Q.23 When two protons are brought together_____________________?

A) Kinetic energy increases
B) P.E. between tem does not change
C) P.E. between them increases
D) P.E. between them decreases

Question no 24:

 

Q.24 Sound waves do not travel in vacuum because ___________________?

A) they are stationary waves
B) they require material medium for propagation
C) they are transverse waves
D) they do not have enough energy

Question no 25:

 

Q.25 Alpha particle ionizes an atom_________________?

A) Through direct collision
B) Through electrostatic attraction
C) All of above
D) Through electrostatic repulsion

Question no 26:

 

Q.26 For a simple pendulu,m the restoring force is caused by________________?

A) Hand
B) Gravity
C) All of these
D) Spring

Question no 27:

 

Q.27 Longitudinal waves do not exhibit _____________________?

A) polarization
B) refraction
C) reflection
D) diffraction

Question no 28:

 

Q.28 The energy liberated when one atom of U-235 undergoes fission reaction is________________?

A) 200MeV
B) 30MeV
C) 40MeV
D) 20MeV

Question no 29:

 

Q.29 The penetrating power of X-rays depends on their______________?

A) source
B) applied voltage
C) all of the above
D) frequency

Question no 30:

 

Q.30 Work done by variable force is determine by dividing____________________?

A) both force and displacement into small intervals
B) force into small interval
C) force into small and displacement into large intervals
D) displacement into small interval

Question no 31:

 

Q.31 When fluid is incompressible then________________?

A) The volume of the fluid is constant
B) The flow of the fluid is the straight line
C) The velocity of the fluid is constant
D) The density of the fluid is constant

Question no 32:

 

Q.32 Biomass can be converted into fuels by____________________?

A) none of these
B) both A and B
C) direct combustion
D) fermentation

Question no 33:

 

Q.33 To reduce the uncertainty in the timing experiment______________?

A) Both a and C
B) Conduct at room temperature
C) Highly precise instrument
D) Count number of vibration

Question no 34:

 

Q.34 According to Newton sound travel in air under the conditions of_____________________?

A) isothermal
B) isobaric
C) isochoric
D) adiabatic

Question no 35:

 

Q.35 Numerical value of Boltzmanns constant is______________?

A) 3.18×10-23JK-1
B) 1.38×10-31JK-1
C) 3.18×10-31JK-1
D) 1.38×10-23JK-1

Question no 36:

 

Q.36 A photon of wavelength 900nm behaves like a particle of mass______________?

A) 2.46 x 10-36kg
B) 0 kg.
C) 1.84 x 10-44kg
D) 5.53 x 10-36kg

Question no 37:

 

Q.37 All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________?

A) same current and potential difference
B) different current but same potential difference
C) same current
D) different current and potential differences

Question no 38:

 

Q.38 Total uncertainty, in the result obtained from the subtraction of two measurements, is equal to_______________?

A) The product of their absolute uncertainties
B) The difference of their absolute uncertainties
C) Sum of their absolute uncertainties
D) Division of their absolute uncertainties

Question no 39:

 

Q.39 Beta particles ionize an atom_________________?

A) Due to a direct collision
B) Due to the electrostatic force of repulsion
C) Due to the electrostatic force of attraction
D) Due to the gravitational force

Question no 40:

 

Q.40 The unit of radioactivity curie is equal to________________?

A) 3.74 x 109 disintegration per sec
B) 3.55 x 1010 disintegration per sec
C) 3.70 x 1010 disintegration per sec
D) 3.60 x 1010 disintegration per sec

Question no 41:

 

Q.41 Which one is not correct for a vector A= 2i+2j+3k ?

A) Has direction 45° with an x-axis
B) Has magnitude -2
C) Has magnitude 2 and direction °=45° with a y-axis
D) Has magnitude 2

Question no 42:

 

Q.42 Magnification of the astronomical telescope is_____________?

A) fo/fe
B) fo+fe
C) (1+fo/fe)L/fo
D) fe/fo

Question no 43:

 

Q.43 An ideal standard of measurement of a base quantity has characteristics_______________?

A) Accessible
B) Transportable
C) Invariable
D) Only a and b are correct

Question no 44:

 

Q.44 The periodic alternation of sound between maximum and minimum loudness are called___________________?

A) silence zone
B) interference
C) beats
D) resonance

Question no 45:

 

Q.45 Which one of the following physical quantities does not have the dimensions of force per unit area ?

A) Pressure
B) Youngs modulus
C) Strain
D) Stress

Question no 46:

 

Q.46 After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?

A) Remains same
B) Decreases because speed decreases
C) Increases then decrease
D) Increases because wavelength decreases

Question no 47:

 

Q.47 In the shadow of a ball the central portion appears bright that happens due to_________________?

A) Refraction
B) Interference
C) Polarization
D) Diffraction

Question no 48:

 

Q.48 A convex lens acts as a diverging lens if the_________________?

A) if the object is with in C
B) object is beyond C
C) if the object is within f
D) both B and C

Question no 49:

 

Q.49 In full wave rectification the output D.C. voltage across the load is obtained for_____________?

A) The negative half cycle of input
B) The positive half cycle of input
C) The complete cycle of input
D) All of the above.

Question no 50:

 

Q.50 A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?

A) K.E hoop = K.E disc
B) K.E hoop = 4K.E disc
C) K.E hoop = 1/2K.E disc
D) K.E hoop = 2K.E disc

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