|Physics MCQs With Answers For PPSC|
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Physics MCQs Objective Type Question Answers Quiz Test
Physics Objective Type Solved MCQs With Answers
Q.1: The number 76.85 is rounded off up to two significant figures as------- ?
- None of these
Q.2: The period of a circular motion is given by------- ?
- T = πv
- T = πw
- T = 2πr
- T = 2πr/v
Q.3: What is the outward force acting on a mass of 10 kg when rotating at one end an inelastic string 10m long at speed of 1m/s ?
Q.4: If a car moves with a uniform speed of 2 ms-1 in a circle of radius 0.4. Its angular speed is-------- ?
- 4 ra
- 5 ra
- 1.6 ra
- 2.8 ms-1
Q.5: If a body of mass 10 kg is allowed to fall freely, its weight becomes--------- ?
- 9.8 N
Q.6: The drag force is given by----------- ?
- Newtons law
- Pascals law
- Gauss law
- Stokes law
Q.7: Concentration of red cells in blood is about------ ?
Q.8: The effect of the decrease in pressure with the increase of the speed of the fluid in a horizontal pipe is known as--------- ?
- Bernoulli effect
- Torricelli effect
- Venturi effect
- Stokes effect
Q.9: The speed of the fluid is maximum in the venturi meter at--------- ?
- Convergent duct
- Divergent duct
- None of these
Q.10: The frequency of the second pendulum is-------- ?
- 1 hertz
- 0.5 hertz
- 1.5 hertz
- 2.5 hertz
Q.11: For what displacement the P.E becomes 1/4 of its maximum value ?
- x = x’
- x = x’/2
- x = x’/4
- x = x(2)’/2
Q.12: A convex lens acts as a diverging lens if the--------- ?
- object is beyond C
- if the object is with in C
- if the object is within f
- both B and C
Q.13: The mass attached to a spring executes ?
- Vibratory motion
- Rotatory motion
- Both A and C
Q.14: Mark the wrong statement ?
- a frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference
- an un-accelerated frame of reference is called an inertial frame of reference
- all the frames of reference in uniform rectilinear motion are equivalent
- Newtons laws of motion are valid in an accelerated (non inertial) frame of reference
Q.15: Einstein’s photoelectric equation is given by------- ?
- 1/2 mvmax2=hf+Φ
- 1/2 mvmax2-hf = Φ
- 1/2 mvmax2=hf-Φ
- All of above are correct
Q.16: If a photon is reflected from the mirror then the change in momentum of each photon is--------- ?
Q.17: In an electron microscope, we use energetic particles because of--------- ?
- Penetrating power is high
- Kinetic energy is large
- Wavelength is very short
- All the above reasons
Q.18: If an object is placed away from 2f of a converging lens then the image will be--------- ?
- real and erect
- virtual and erect
- real and inverted
Q.19: For normal adjustment, length of astronomical telescope is--------- ?
- fo + fe
- fo – fe
- fo / fe
- fe / fo
Q.20: Errors in the transmission of power through optic fiber can be minimized by using a--------- ?
- Multimode index fiber
- Graded index fiber
- Single mode step index fiber
- Copper wire