Wednesday, 22 January 2020

Physics Objective Questions And Answers Online Preparations

Hello Readers here you will learn solved question Answers of Physics One line question answers. These MCQs are helpful for Teachers of Physics For NTS - National Testing Service and PPSC - Punjab Public Service Commission Jobs Test for Physics question Answers.


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Physics MCQs Question Answers


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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. π/2
  2. π
  3. 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

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