Physics Questions and Answers for Competitive Exam
Physics General Knowledge
Q.32 Out of the following which is not emitted by radioactive substance?
(A) Electrons
(B) Electromagnetic radiations
(C) Alpha particles
(D) Neutrons
Ans . D
Q.33 Lux is the SI unit of
(A) intensity of illumination
(B) luminous efficiency
(C) luminous flux
(D) luminous intensity
Ans . A
Q.34 On a rainy day, small oil films on water show brilliant colours. This is due to
(A) dispersion
(B) interference
(C) diffraction
(D) polarization
Ans . B
Q.35 Point A is at a lower electrical potential than point B. An electron between them on the line joining them will.
(A) move towards A
(B) move towards B
(C) move at right angices to the line joining A and B
(D) remain at rest
Ans . B
Q. 36 Material for rain-proof coats and tents owe their water-proof properties to
(A) surface tension
(B) viscosity
(C) specific gravity
(D) elasticity
Ans . A
Q.37 RADAR is used for
(A) locating submerged submarines
(B) receiving a signal in a radio receiver
(C) locating geostationary satellites
(D) detecting and locating the position of objects such as airplanes
Ans . D
Q.38 Sound of frequency below 20 Hz is called.
(A) audio sounds
(B) infrasonic
(C) ultrasonic
(D) supersonics
Ans . B
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Rajesh Bhatia
A Writer, Teacher and GK Expert. I am an M.A. & M.Ed. in English Literature and Political Science. I am highly keen and passionate about reading Indian History. Also, I like to mentor students about how to prepare for a competitive examination. Share your concerns with me by comment box. Also, you can ask anything at linkedin.com/in/rajesh-bhatia-7395a015b/.
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