A camera uses a _____ to form an image.
A. convex lens
B. concave lens
C. condenser lens
D. none of these
Which from the following is true for “Sound”?
A. Sound cannot travel through a vaccum
B. Sound cannot travel through gases
C. Sound cannot travel through liquids
D. Sound cannot travel through solids
A device which converts chemical energy into electrical energy is called:
A. motor
B. generator
C. moving-coil meter
D. Battery
For a fixed mass of gas at constant temperature, if we decrease volume, the pressure will:
A. also decrease
B. increase
C. remains constant
D. none of these
A Longsightedness can be corrected by using the _____ lens.
A. Concave
B. Convex
C. Diverging
D. None of these
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