TNPSC Group 1, 2 Physics Online Mock Test in English and Tamil - 3

Question: 11

Millikan’s experiment determines ___

(A) Mass of an electron

(B) Charge density of an electron

(C) Charge of an electron

(D) Specific charge of an electron

Question: 12

The energy of a photon of characteristics X-ray from a Coolidge tube comes from ___

(A) An atomic transition in the target

(B) The kinetic energy of the striking electron

(C) The kinetic energy of ions of the target

(D) The kinetic energy of the free electrons of the target

Question: 13

Canal rays are produced at a pressure of ______ of mercury.

(A) 1 mm

(B) 0.01 mm

(C) 10 mm

(D) 0.01 mm

Question: 14

Cathode rays possess ___

(A) Momentum

(B) Kinetic energy

(C) Potential energy

(D) Both (a) and (b)

Question: 15

The electric current passes through a gas column if the applied potential difference is ___

(A) Small and the pressure is high

(B) Small and the pressure is low

(C) Large and the pressure is low

(D) Large and the pressure is high