Physics - Section 1 Multiple Questions and Answers.




26.Lux is the SI unit of
A. intensity of illumination
B. luminous efficiency
C. luminous flux
D. luminous intensity

27. On a rainy day, small oil films on water show brilliant colours. This is due to
A. dispersion
B. interference
C. diffraction
D. polarization

28.. 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

29. Materials for rain-proof coats and tents owe their water-proof properties to
A. surface tension
B. viscosity
C. specific gravity
D. elasticity

30.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

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