Physics General Knowledge Questions: Physics GK Question for Competitive Exams
Q. Lux is the SI unit of
A.intensity of illumination
B.luminous efficiency
C.luminous flux
D.luminous intensity
Ans .A
Q. 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. 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 angles to the line joining A and B
D.remain at rest
Ans .B
Q. RADAR is used for
A.locating submerged submarines
B.receiving a signals in a radio receiver
C.locating geostationary satellites
D.detecting and locating the position of objects such as aeroplanes
Ans .D
Q. Sound of frequency below 20 Hz is called
A.audio sounds
B.infrasonic
C.ultrasonic
D.supersonics
Ans .B
Q. Radiocarbon is produced in the atmosphere as a result of
A.collision between fast neutrons and nitrogen nuclei present in the atmosphere
B.action of ultraviolet light from the sun on atmospheric oxygen
C.action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
D.lightning discharge in atmosphere
Ans .A
Q. It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A.work done in rolling is more than in lifting
B.work done in lifting the stone is equal to rolling it
C.work done in both is same but the rate of doing work is less in rolling
D.work done in rolling a stone is less than in lifting it
Ans .D
Q. Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to
A.the heating effect of current alone
B.hysteresis loss alone
C.both the heating effect of current and hysteresis loss
D.intense sunlight at noon
Ans .C
Q. Nuclear sizes are expressed in a unit named
A.Fermi
B.angstrom
C.newton
D.tesla
Ans .A
Q. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is
A.1200 m
B.0.33 km
C.3.33 km
D.33 km
Ans .A
Q. One nanometer is equal to
A.10-6m
B.10-8m
C.10-9m
D.10-5m
Ans .C
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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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