physics MCQs – Page 17

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs

321. A particle having the mass of an electron and the charge of a proton is called a______________?
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A. Positron

B. Gamma rays

C. Photon

D. Antiproton

322. The angular position of cells remains the same for a sample of a crystal. This property is called___________________?
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A. Cleavage

B. Isotropy

C. The external symmetry of form

D. Homogeneity

323. The curie temperature is that at which ____________________?
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A. Semi-conductor becomes conductors

B. Metals become super conductor

C. Ferromagnetic becomes paramagnetic

D. Paramagnetic becomes diamagnetic

324. The direction of propagation of an electromagnetic waves is________________?
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A. Perpendicular to electric field

B. Perpendicular to both electric and magnetic field

C. Perpendicular to magnetic field

D. Parallel to electric and magnetic field

325. An alternating current or voltage_____________________?
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A. changes its direction again and again

B. changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals

C. fluctuates off and on

D. varies in magnitude alone

326. In which quadrant, the only value of tan will be positive ?
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A. First

B. Second

C. Third

D. Both 1st and 3rd

327. The highest value of escape velocity in solar system is planet____________________?
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A. Moon

B. Neptune

C. Earth

D. Jupiter

328. Geiger counter is suitable for _________________?
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A. Fast counting

B. Extremely fast counting

C. Slow counting

D. All situations

329. The electrons in conduction band are free to___________________?
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A. Transport impulses

B. Transport signals

C. Transport vibrations

D. Transport charge

330. In a multi range ammeter as the range increases _____________________?
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A. shunt value decreases

B. none of the above

C. shunt value increases

D. shunt value remains the same

331. Cos?i^ + Sin?j^ is a_________________?
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A. Vector in the direction at angle ? with an x-axis

B. Vector

C. The unit vector in the direction at angle ? with an x-axis

D. Position Vector

332. The escape velocity of a body in gravitational field of earth is independent of__________________?
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A. its mass

B. the angle at which it is thrown

C. both its mass and the angle at which it is thrown

D. gravitational field of earth

333. Work done by variable force is determine by dividing____________________?
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A. force into small interval

B. displacement into small interval

C. both force and displacement into small intervals

D. force into small and displacement into large intervals

334. The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?
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A. Iron rods

B. Graphite rods

C. Platinum rods

D. Cadmium rods

335. Maximum number of components of a vector may be________________?
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A. 2

B. Infinite

C. 1

D. 3

336. The bulk properties of materials such as their mode of fracture can be related to their____________________?
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A. Dislocation

B. Cleavage

C. Microstructure

D. Polymerization

337. A mass spectrograph (spectrometer) sorts out____________?
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A. Molecules

B. Ions

C. Elements

D. Isotopes

338. The breaking of crystals along definite direction is called _____________________?
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A. Cleavage

B. Symmetry

C. Homogeneity

D. Isotropy

339. A field in which the work done in a moving a body along closed path is zero is called________________?
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A. conservative field

B. electric field

C. electromagnetic field

D. gravitational field

340. Which one of the following possesses greater penetration power ?
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A. ?-rays

B. ?-rays

C. Neutron-rays

D. ?-rays

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