physics Mcqs
501. If a material object moves with speed of light its mass becomes ________________?
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A. equal to its rest mass

B. infinite

C. double of its rest mass

D. zero

502. The circumference subtends an angle________________?
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A. ?/2 radian

B. 2? radian

C. 4? radian

D. ? radian

503. The normal blood pressure range for a human body is______________?
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A. 100 to 80 torr

B. 60 to 140 torr

C. 120 to 80 torr

D. 120 to 60 torr

504. The drag force is given by_________________?
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A. Gauss law

B. Newtons law

C. Pascals law

D. Stokes law
505. The error in measurement may occur due to_________________?
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A. Inappropriate method

B. Due to all reasons in A, B and C

C. The inexperience of a person

D. The faulty apprentice

506. In hydrogen spectrum which one of the following series lies in the ultraviolet region ?
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A. Bracket series

B. Lymann series

C. Pfund series

D. Balmer series

507. A digit zero in a measurement__________________?
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A. May be significant may not significant

B. Significant only if left to a significant figure

C. Always insignificant sign

D. Always significant

508. SI unit of the coefficient of viscosity is___________________?
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A. Kg.m.S

B. Kg m-1.S-1

C. Kg.m.S-1

D. Kg-1.m-1.S-1

509. Electrical resonance is observed in_______________?
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A. Radio

B. Microwave oven

C. Both in radio and microwave oven

D. Neither in radio nor in a microwave oven

510. A body can have constant velocity when it follows a_____________?
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A. Parabolic path

B. Rectilinear path

C. Circular path

D. Elliptical path

511. The minimum distance between an object and its real image in a convex lens is_____________?
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A. 4f

B. 2.5 f

C. 2 f

D. 3f

512. The equation ? = 1.22 ?/D was devised by_______________?
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A. Raleigh

B. Newton

C. Einstein

D. Planks

513. The frequency of the second pendulum is________________?
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A. 1 hertz

B. 1.5 hertz

C. 0.5 hertz

D. 2.5 hertz

514. The span of the broad jump depends upon_______________?
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A. Height of jump

B. Mass of the jumper

C. Angle of projection

D. None

515. Concentration of red cells in blood is about______________?
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A. 40%

B. 25%

C. 75%

D. 50%
516. A photon of wavelength 900nm behaves like a particle of mass______________?
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A. 1.84 x 10-44kg

B. 5.53 x 10-36kg

C. 0 kg.

D. 2.46 x 10-36kg
517. The angular speed of seconds hand of a watch in rads-1 is______________?
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A. ?/180

B. ?/30

C. ?/2

D. ?

518. Which one is the dimensionally correct equation ?
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A. V=f/t

B. f=vt

C. V=St

D. S=Vit+1/2at2
519. The mass attached to a spring executes ?
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A. Vibratory motion

B. Rotatory motion

C. S.H.M

D. Both A and C
520. Which equation is not dimensionally correct ?
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A. S=1/2at2

B. E=mc2

C. S=Vt2

D. Vf=Vi+at

521. For ___________ flow the path of the fluid particles cannot be tracked?
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A. Laminar

B. Streamline

C. Turbulent

D. Both A and B

522. The effect of the decrease in pressure with the increase of the speed of the fluid in a horizontal pipe is known as______________?
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A. Bernoulli effect

B. Stokes effect

C. Torricelli effect

D. Venturi effect
523. Image of an object 5 mm high is only 1 cm high. Magnification produced by lens is__________________?
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A. 0.5

B. 1

C. 2

D. 0.2

524. One light year is equal to________________?
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A. 9.5x1015m

B. 9.5x1015Km

C. 9.5x1015cm

D. 9.5x1015sec

525. In cricket when a bowler produce reverse swing the ball will move towards______________?
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A. he shinning side of the ball

B. Goes straight

C. Rough side

D. The seam of the ball

526. Terminal velocity of the body is directly proportional to the_______________?
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A. Square of the diameter of the body

B. The radius of the body

C. The diameter of the body

D. Size of the body

527. If a diffraction grating is placed in the path of a light beam it reveals______________?
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A. Electromagnetic wave property

B. Wave property

C. Energy particle

D. Particle property

528. Irregular flow of fluid is called_______________?
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A. Uniform

B. Turbulent

C. Laminar

D. Streamline

529. The density of human blood is nearly equal to____________?
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A. Honey

B. Water

C. Mercury

D. Oil (kerosene)

530. Radiations are used for the treatment of skin of a patient is_______________?
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A. Gamma rays

B. X-rays

C. Beta rays

D. Alpha rays

531. hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?
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A. 180

B. 0

C. 90

D. 45

532. The critical speed of an artificial satellite is_______________?
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A. 8 ms-1

B. 8.1 Kms-1

C. 8 Kms-1

D. 7.9 Kms-1
533. Dioptre power of an concave lens of 10 cm focal length is_______________?
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A. 10 dioptre

B. 1 / 10 dioptre

C. 1 / 10 dioptre

D. 10 dioptre

534. Total number of series in hydrogen spectrum is_____________?
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A. five

B. four

C. three

D. six

535. Ratio of the weight of H-atom to that of an electron is approximately______________?
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A. 183.6

B. 1836

C. 18360

D. 18.336

536. Which of the following will be a better shield against gamma rays ?
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A. Aluminum

B. Heavy water

C. Ordinary water

D. Lead
537. The relation between linear and angular acceleration is______________?
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A. a = r x a

B. r = a x a

C. a = a x r

D. a = a x r

538. Which one of the following radiations has the strongest photon?
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A. Microwaves

B. ?-rays

C. T.V waves

D. X-rays

539. Michelson devised the formula to calculate the speed of light_______________?
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A. C = 8fd

B. C = 4fd

C. C = 5/2fd

D. C = 16fd
540. A body of 2 kg is suspended from the ceiling of an elevator moving up with an acceleration g. Its apparent weight in the elevator will be______________?
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A. 19.6 N

B. 39.2 N

C. 129.4 N

D. 9.8 N

541. 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 ?
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A. 1N

B. 100N

C. 2N

D. 10N

542. The least distance of distinct vision for a normal eye is_______________?
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A. 40 cm

B. 30 cm

C. 15 cm

D. 25 cm
543. Beta particles ionize an atom_________________?
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A. Due to the gravitational force

B. Due to a direct collision

C. Due to the electrostatic force of repulsion

D. Due to the electrostatic force of attraction

544. If an object is placed away from 2f of a converging lens then the image will be_______________?
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A. real and inverted

B. virtual and erect

C. real and erect

D. virtual

545. Stokes law is applicable if body has __________shape?
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A. Square

B. Rough

C. Spherical

D. Circular

546. The value of critical angle for glass is_______________?
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A. 47

B. 50

C. 42

D. 52

547. The radius of geostationary orbit from the centre of the earth is nearly______________?
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A. 36000km

B. 18000 km

C. 24000 km

D. 42000km
548. Absolute uncertainty in a measurement depends upon______________?
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A. Least count of the instrument

B. The magnitude of the measurement

C. Percentage error in the measurement

D. All of a, b and C

549. The carburettor of a car is an application of_______________?
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A. Venturi meter

B. Bernoulli equation

C. Both A and B

D. None

550. The number of significant figures in 5.400 is________________?
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A. None

B. 2

C. 3

D. 5