TNPSC Physics Objective Questions and Answers - 1

Question: 1

____ is the device used in discharge tube to maintain a high potential difference.

(A) DC generator

(B) Induction coil

(C) AC generator

(D) Transformer

Question: 2

The first excitation potential energy or the minimum energy required to excite the atom from ground state of hydrogen atom is ___

(A) 1.89 eV

(B) 13.6 eV

(C) 10.2 eV

(D) 3.4 eV

Question: 3

The potential required for conduction of electricity through a gas under low pressure is ____

(A) 50 V

(B) 500 V

(C) 5000 V

(D) 50,000 V

Question: 4

Retina of the eye is comparable to which of the following parts of a traditional camera?

(A) Cover

(B) Shutter

(C) Lens

(D) Film

Question: 5

The colour of the star is an indication of its

(A) Distance from the sun

(B) Luminosity

(C) Temperature

(D) Distance from earth