Physics Objective Questions And Answers Online Preparations

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Physics MCQs Question Answers

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Physics Objective Type MCQs For PPSC Interviews

Q.1: When a wheel 1 m in diameter makes 30 rev min the linear speed of the point on its rim in ms-1 is-------- ?

1. 2π
2. π/2
3. π
4. 20π

B

Q.2: When a body is moving along a circular path it covers a certain angle in a given interval of time. Such type of motion is------- ?

1. Vibratory motion
2. Linear motion
3. Rotatory motion
4. Angular motion

D

Q.3: Irregular flow of fluid is called----------- ?

1. Streamline
2. Turbulent
3. Uniform
4. Laminar

B

Q.4: S.I unit of frequency is--------- ?

1. Vibration S-2
2. Radian
3. Hertz
4. ms-1

C

Q.5: Total number of series in hydrogen spectrum is------- ?

1. three
2. four
3. five
4. six

C

Q.6: Bernoulli’s equation is obtained by applying the law of conservation of --------- ?

1. Mass
2. Energy
3. Momentum
4. Fluid

B

Q.7: If a convex lens of large aperture fails to converge the light rays incident on it to a single point, it is said to suffer from-------- ?

1. chromatic aberration
2. spherical aberration
3. both spherical and chromatic
4. distortion

B

Q.8: Reflecting mirrors in laser is used to--------- ?

1. Further stimulation
2. Lasing more
3. For producing more energetic lasers
4. None of these

A

Q.9: In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is--------- ?

1. he/ev
2. he/Vc
3. eV/h
4. impossible to predict

A

Q.10: Metabolism is the name of a process in which energy transformation takes place within--------- ?

1. Heat engine
2. Human body
3. Atmosphere
4. Laboratory

B

Q.11: In which process all the heat supplied is converted into work done ?

1. isothermal
2. isochoric
3. isobaric
4. isentropic

A

Q.12: A body will be in complete equilibrium when it is satisfying--------- ?

1. 1st condition of equilibrium
2. 2nd condition of equilibrium
3. Both Ist and 2nd condition of equilibrium
4. Impossible

C

Q.13: It is easier to turn a steering wheel with both hands than with a single hand because------- ?

1. Accelerating force increases on the wheel
2. Two forces act on the wheel
3. Two hands provide a firm grip
4. The couple acts on the wheel

D

Q.14: Three coplanar forces acting on a body keep it in equilibrium. They should therefore be-------- ?

1. Concurrent
2. Non-concurrent
3. Parallel
4. Non-parallel

A

Q.15: The velocity of an oscillating charge as it moves to and fro along a wire is always------ ?

1. constant
2. zero
3. changing
4. infinite

C

Q.16: The direction of the vector product is given by--------- ?

1. Head to tail rule
2. Right-hand rule
3. Left-hand rule
4. Triangular rule

B

Q.17: Which one is not a type of dynamic equilibrium ?

1. Rotational equilibrium
2. Translational equilibrium
3. Static equilibrium
4. Both A and C are corret answer

C

Q.18: Radioactive decay obeys which one of the following law ?

1. N=Noe-λt
2. N=Noeλt
3. N=Noe-λt/2
4. No=N(1+eλt)

A

Q.19: The SI unit of Heat is------ ?

1. Watt
2. Volt
3. Joule
4. Newton

C

Q.20: The physics of moving charge particles is known as------- ?

1. Plasma physics
2. Electro-static’s
3. Electro-magnetic
4. Electro-dynamics

D