physics Mcqs
551. The maximum safe limit dose for persons working in a nuclear power station is ________________?
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A. 1 rem per week

B. 4 rem per week

C. 3 rem per week

D. 5 rem per week
552. The velocity of the mass attached to a spring is maximum at_______________?
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A. Mean position

B. Extreme position

C. Both A and B

D. None

553. For what displacement the P.E becomes 1/4 of its maximum value ?
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A. x = x/2

B. x = x(2)/2

C. x = x/4

D. x = x

554. If n number of the photon is striking on a metal surface then total momentum exerted is_______________?
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A. n

B. p

C. None

D. 0

555. The speed of the fluid is maximum in the venturi meter at_______________?
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A. None of these

B. Convergent duct

C. Divergent duct

D. Throat

556. Ideal fluid is_______________?
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A. Possess all properties

B. Steady flow

C. Non-viscous

D. Incompressible

557. After traveling through a vacuum a photon of light entering into some transparent denser medium. Thus the energy of light______________?
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A. Decreases because speed decreases

B. Increases then decrease

C. Remains same

D. Increases because wavelength decreases

558. Which branch of science plays an important role in the development of technology and engineering ?
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A. Biology

B. Chemistry

C. Geology

D. Physics
559. The blood flow is _______________ flow at systolic pressure?
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A. Turbulent

B. Laminar

C. Mixed

D. None

560. 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__________________?
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A. Vibratory motion

B. Rotatory motion

C. Linear motion

D. Angular motion
561. A lens which converges a beam of parallel rays to a point is called______________?
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A. converging (or convex) lens

B. diverging (or concave) lens

C. plano concave lens

D. plano convex lens

562. According to equation of continuity A1V1 = A2V2 = constant. The constant is equal to_______________?
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A. Mass of fluid

B. Flow rate

C. The density of the fluid

D. Volume of fluid

563. The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?
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A. Stephens law

B. Plancks

C. Rayleigh-Jeans law

D. Karl-Weins law

564. The instrument used to measure blood pressure is called____________?
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A. Sphygmomanometer

B. Blood pressure

C. Venturimeter

D. Sonometer

565. Pair production cannot take place in a vacuum as ________________?
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A. Energy is not conserved

B. Mass is not conserved

C. Momentum is not conserved

D. The chargee is not conserved

566. A satellite moving around the earth constitutes______________?
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A. An inertial frame of reference

B. Non-inertial frame

C. Neither inertial nor non-inertial

D. Both inertial and non-inertial

567. Photon of highest frequency will be absorbed when transition takes place from_____________?
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A. 4th to 5th orbit

B. 1st to 5th orbit

C. 3rd to 5th orbit

D. 2nd to 5th orbit

568. For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?
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A. Should be greater than the speed of light.

B. 107m/sec

C. Not be wave-like

D. Be zero

569. Venturi meter is used to measure_________________?
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A. Fluid pressure

B. Fluid speed

C. None

D. Fluid density

570. The product of the frequency and time period is equal to_________________?
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A. 1

B. 2

C. 3

D. 4

571. Forced vibration is known as_____________________?
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A. Simple harmonic vibration

B. Driven harmonic vibration

C. Free vibration

D. Natural vibration

572. In Compton scattering, the change in wavelength is maxed if_______________?
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A. The angle of scattering is 180

B. The angle of scattering is 0

C. The angle of scattering is 90

D. The angle of scattering is 60

573. Displacement of the body in S.H.M is equal to amplitude when the body is at_______________?
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A. Mean position

B. Extreme position

C. Elsewhere

D. None

574. At Murree Hills (Assume the value of g changes). If we use a simple pendulum as time standard then one-second duration will_____________?
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A. Increase

B. Remains the same

C. Decrease

D. Is zero

575. Which of the following is not a correct representation method for prefixes______________?
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A. 1mm

B. 10km

C. 1000um

D. Both A and B

576. The period of a circular motion is given by_______________?
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A. T = ?v

B. T = 2?r

C. T = ?w

D. T = 2?r/v
577. Simple harmonic motion is a type of________________?
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A. Rotational motion

B. Circular motion

C. Vibratory motion

D. Musical arrangement

578. For which position maximum blood pressure in the body have the smallest value ?
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A. Laying horizontally

B. Sitting on chair

C. Standing straight

D. Sitting on ground

579. Mark the wrong statement ?
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A. a frame of reference which is either at rest or moves with a constant velocity is called an inertial frame of reference

B. all the frames of reference in uniform rectilinear motion are equivalent

C. Newtons laws of motion are valid in an accelerated (non inertial) frame of reference

D. an un-accelerated frame of reference is called an inertial frame of reference

580. The angular speed for daily rotation of the earth in rad S-1 is______________?
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A. 3.7 x 10 7.3 x 5 radians/second

B. 7.3 x 10-5 radians/second

C. 7.3 x 10 radians/second

D. 7.3 x 5 radians/second

581. Bernoullis equation is obtained by applying the law of conservation of ________________?
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A. Momentum

B. Energy

C. Mass

D. Fluid

582. Errors in the transmission of power through optic fiber can be minimized by using a______________?
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A. Copper wire

B. Multimode index fiber

C. Graded index fiber

D. Single mode step index fiber

583. ML-1 T-2 is the dimension of_______________?
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A. Pressure

B. Force

C. Energy

D. Momentum

584. 0.001 kg mass will be equivalent to_________________?
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A. 25.00 GWh

B. 250 GWh

C. 0.26 GWh

D. 2.50 GWh

585. The energy absorbed by a body is __________________ at resonance?
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A. Maximum as well minimum

B. Maximum only

C. 0

D. Minimum only

586. The relativistic energy E is equivalent to relativistic mass given by_______________?
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A. E/c2

B. E/c

C. c2/E

D. Ec2

587. In any measurement the significant figures are______________?
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A. All accurately known and all doubtful digits

B. Only doubtful digits

C. All accurately known digits and the first doubtful digit

D. Only accurately known digits

588. According to Einstein, the gravitational interaction is possible between_______________?
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A. electromagnetic radiations

B. material objects only

C. material objects and electromagnetic radiation only

D. none of the above

589. A point where the incident parallel rays of light converge or appear to diverge after passing through a lens is called______________?
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A. focus

B. aperture

C. center of curvature

D. optical center

590. The waveform of S.H.M. is________________?
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A. Square wave

B. Sine wave

C. None

D. Standing wave

591. A chimney works best if air exposed to the chimney is______________?
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A. Stationary

B. Moving fast

C. Moving

D. Moving slowly

592. When the amplitude of a wave becomes double its energy become_________________?
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A. None time

B. Double

C. Four times

D. One half

593. The dimensions of the coefficient of viscosity are_____________?
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A. ML-1T-1

B. M2L1T1

C. ML1T-1

D. M2L-1T-1

594. The acceleration of a projection on the diameter for a particle moving along a circle is_______________?
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A. wx2

B. wx2

C. w2x

D. w2x
595. The force responsible for the vibratory motion of the simple pendulum is_________________?
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A. mg ton?

B. mg

C. mg cos?

D. mg sin?
596. If the length of the second pendulum becomes four times, then its time period will become________________?
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A. 2 times

B. 8 times

C. 4 times

D. 6 times

597. A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?
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A. K.E hoop = 2K.E disc

B. K.E hoop = 4K.E disc

C. K.E hoop = 1/2K.E disc

D. K.E hoop = K.E disc

598. When the body moves with terminal velocity the acceleration in the body become_____________?
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A. 0

B. Variable

C. Infinite

D. Maximum

599. A device for producing high-velocity nuclei is ________________?
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A. Wilson cloud chamber

B. A mass spectrograph

C. Linear accelerator

D. Cloud chamber

600. In obtaining an X-ray photograph of our hand we use the principle of______________?
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A. any of above

B. shadow photograph

C. photo electric effect

D. ionization