PG TRB Model Question Paper for Physics with Answer - 3

Question: 11

When light rays travel from a rarer medium to denser medium it is refracted

(A) In a different path

(B) Away from the normal

(C) Towards the normal

(D) In the same path

Question: 12

Which instrument measures the intensity of earthquake shocks?

(A) Radar

(B) Thermometer

(C) Seismograph

(D) Barometer

Question: 13

₂He⁴ means

(A) Positive rays

(B) Alpha rays

(C) Beta rays

(D) Gamma rays

Question: 14

Laser is a device for producing

(A) Stimulated radiation

(B) Scattered radiation

(C) Spontaneous radiation

(D) Dispersed radiation

Question: 15

Decibel is used to measure

(A) Sound intensity

(B) Light intensity

(C) Magnitude of earthquake

(D) None of the above