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Number of MCQs: 50 20 50 100 150 200

Question no 1:

 

Q.1 At what temperature is the Fahrenheit scale reading equal to twice that of the Celsius scale?

A) 280°C
B) 460°C
C) 160°C
D) 360°C

Question no 2:

 

Q.2 The first overtone of a stretched string of given length is 320 Hz. The first harmonic is_________?

A) 640 Hz
B) 160 Hz
C) 320 Hz
D) 480 Hz

Question no 3:

 

Q.3 Which one does not work according to resonance ?

A) Bulb
B) Microwave oven
C) Radio
D) T.V

Question no 4:

 

Q.4 If the length of the second pendulum becomes four times, then its time period will become________________?

A) 2 times
B) 4 times
C) 8 times
D) 6 times

Question no 5:

 

Q.5 Mark the wrong statement ?

A) an un-accelerated frame of reference is called an inertial frame of reference
B) Newtons laws of motion are valid in an accelerated (non inertial) frame of reference
C) all the frames of reference in uniform rectilinear motion are equivalent
D) a frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference

Question no 6:

 

Q.6 Reverse process of photoelectric effect is_______________?

A) Compton effect
B) pair production
C) X-rays production
D) annihilation of matter

Question no 7:

 

Q.7 In damped harmonic oscillation which one decreases ?

A) Both amplitude and energy
B) Energy of vibration
C) Amplitude of vibration
D) Neither amplitude nor energy

Question no 8:

 

Q.8 An OP-AMPs can amplify_______________?

A) Both &
B)
C) None of the above
D)

Question no 9:

 

Q.9 Two fog droplets have radius 2:3 their terminal velocities are_______________?

A) 4:06
B) 4:09
C) 2:09
D) 4.3

Question no 10:

 

Q.10 The rotational K.E of the hoop is equal to the______________?

A) double than its translational K.E
B) its translational K.E
C) four times than its translational K.E
D) half than its translational K.E

Question no 11:

 

Q.11 The minimum wavelength of X-rays can further be reduced by _______________?

A) Reducing the pressure or cooling the target
B) Increasing the potential difference between the cathode and the target
C) Increasing the temperature of the filament.
D) Using a target element of higher atomic number

Question no 12:

 

Q.12 A convex lens acts as a diverging lens if the_________________?

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

Question no 13:

 

Q.13 We can produce heat by________________?

A) All of the above
B) Frictional process
C) Electrical processes
D) Chemical processes

Question no 14:

 

Q.14 Two identical coaxial circular loops carry equal currents in the same direction. If the loops approach each other the current in______________?

A) One increases whereas that in the other decreases
B) Each increase
C) Each remains the same
D) Each decrease

Question no 15:

 

Q.15 Electrons_________________?

A) Can exist inside the nucleus
B) Can exist both inside and outside the nucleus
C) Cannot exist inside the nucleus
D) Do not know

Question no 16:

 

Q.16 Nuclei having the same mass number but different atomic number are____________?

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

Question no 17:

 

Q.17 If a photon is reflected from the mirror then the change in momentum of each photon is_______________?

A) 1
B) Half
C) Double
D) Zero

Question no 18:

 

Q.18 Which branch of science plays an important role in the development of technology and engineering ?

A) Biology
B) Chemistry
C) Physics
D) Geology

Question no 19:

 

Q.19 The name of the photon for quantum of light was proposed by________________?

A) Plank
B) Einstein
C) Ampere
D) Thomson

Question no 20:

 

Q.20 Which of the following is true ?

A) Paschen series is a line spectrum in the infra red.
B) the spectral series formula can be derived from the Rutherford model of the hydrogen atom.
C) Balmer series is a line spectrum in the ultraviolet.
D) Lyman series is a continuous spectrum.

Question no 21:

 

Q.21 In He-Ne laser the lasing action is produced by_______________?

A) Electrons of He
B) Ne only
C) Electrons Ne
D) He-Ne both

Question no 22:

 

Q.22 The penetrating power of X-rays depends on their______________?

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

Question no 23:

 

Q.23 Minimum number of communication satellites required to cover the whole earth is______________?

A) 5
B) 2
C) 3
D) 4

Question no 24:

 

Q.24 The rectangular voltage is an example of____________________?

A) Continuous wave form
B) An analogue waveform
C) Electronic waveform
D) A digital waveform

Question no 25:

 

Q.25 The value of R ( Universal Gas Constant ) = ___________?

A) 8.314 J/mole K
B) 10.314 J/mole K
C) 6.5  J/mole K
D) 1.314 J/mole K

Question no 26:

 

Q.26 The especially designed semiconductor diodes used as indicator lamps in electronic circuits are___________?

A) The light emitting diode
B) Solar cells.
C) The photo diodes
D) The switch

Question no 27:

 

Q.27 What is unit of conductivity?

A) Ohm
B) None of these
C) Watt
D) mho

Question no 28:

 

Q.28 Absolute uncertainty in a measurement depends upon______________?

A) Least count of the instrument
B) All of a, b and C
C) The magnitude of the measurement
D) Percentage error in the measurement

Question no 29:

 

Q.29 The number of significant figures in the length of a bar 6200mm measured by meter rod is_______________?

A) None of these
B) 3
C) 2
D) 4

Question no 30:

 

Q.30 Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?

A) Sometimes smaller some times greater
B) Greater than 82
C) Smaller
D) Same

Question no 31:

 

Q.31 The unit of force in CGS, system is __________?

A) Dyne
B) Pound
C) Newton
D) None of these

Question no 32:

 

Q.32 For the successful operation of Heat engine which condition should be met ?

A) cyclic process
B) operated at certain temperature difference
C) none of these
D) both A and B

Question no 33:

 

Q.33 The displacement of SHM is written as X = X`sinθt if the displacement is written by X = Xθ sont then phase constant will be equal to_______________?

A) 45°
B) 0°
C) 90°
D) 180°

Question no 34:

 

Q.34 Systolic pressure is called_______________?

A) Low blood pressure
B) Normal blood pressure
C) Abnormal blood pressure
D) High blood pressure

Question no 35:

 

Q.35 The magnitude of the cross product is equal to the dot product between them. The angle between the two vectors is________________?

A) 180°
B) 60°
C) 30°
D) 45°

Question no 36:

 

Q.36 When the amplitude of a wave becomes double its energy become_________________?

A) Four times
B) Double
C) None time
D) One half

Question no 37:

 

Q.37 In fission process_______.

A) massive nucleus join together
B) None of these
C) massive nucleus splits to form smaller fragments
D) both A & B

Question no 38:

 

Q.38 The centripetal acceleration produced in a rotating body is commonly due to change on_________of body?

A) direction 
B) both
C) magnitude
D) None of these

Question no 39:

 

Q.39 Terminal velocity is_____________?

A) Neither uniform nor maximum
B) Maximum
C) Uniform and maximum
D) Uniform

Question no 40:

 

Q.40 If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________?

A) B = Ax By + Ay Bz + Az By
B) B = Ax Bz + Ay By + Az Bx
C) B = Ay Bz + Az By + Az Bx
D) B = Ax Bx + Ay By + Az Bz

Question no 41:

 

Q.41 With the increase of pressure, the boiling point of any substance:

A) Increases
B) Decreases
C) Remains same
D) Becomes Zero

Question no 42:

 

Q.42 Select an alternative from of uncertainly principle from the following_______________?

A) Any of above
B) ∆E = h/m∆c(1-cosθ)
C) mc2 = hv
D) ∆E . ∆t = h

Question no 43:

 

Q.43 Radioactive decay obeys which one of the following law ?

A) N=Noe-λt/2
B) No=N(1+eλt)
C) N=Noeλt
D) N=Noe-λt

Question no 44:

 

Q.44 Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?

A) X-rays
B) α-rays
C) β-rays
D) γ-rays

Question no 45:

 

Q.45 One pico stands for_________________?

A) 10 raised to power -9
B) 10 raised to power -12
C) 10 raised to power -6
D) 10 raised to power -15

Question no 46:

 

Q.46 Which one is the highest power multiple ?

A) Beta
B) Mega
C) Giga
D) Deca

Question no 47:

 

Q.47 A stone is whirled in a vertical circle at the end of a string. When the stone is at the highest position the tension in the string is______________?

A) Less than the weight of the stone
B) Maximum
C) Equal to the weight of the stone
D) Zero

Question no 48:

 

Q.48 The internal energy of the system increases__________?

A) in isothermal expansion
B) in adiabatic compression
C) in isothermal compression
D) in adiabatic expansion

Question no 49:

 

Q.49 The equation θ = 1.22 λ/D was devised by_______________?

A) Einstein
B) Planks
C) Newton
D) Raleigh

Question no 50:

 

Q.50 Moving along the circumference of a circle completes two revolutions. If the radius of the circular path is R, the ratio of displacement to the covered path will be_______________?

A) 2πR
B) πR
C) 4πR
D) 0

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