PG TRB Physics Model Question Paper with Answer - 3

Question: 11

Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into

(A) Sunlight

(B) Infrared light

(C) Ultraviolet light

(D) Mercury light

Question: 12

Two free parallel wires carrying currents in opposite directions.

(A) Do not affect each other

(B) Attract each other

(C) Repel each other

(D) None of these

Question: 13

Stars are twinkling due to

(A) scattering

(B) reflection

(C) refraction

(D) diffraction

Question: 14

Gravitational force shares a common feature with electromagnetic force. In both cases, the force is

(A) between charged objects

(B) between massive and neutral objects

(C) a long range

(D) a short range

Question: 15

The lines of force of a uniform magnetic field

(A) must be divergent

(B) must be convergent

(C) must be parallel to each other

(D) intersect