TNPSC Physics Online Test in Tamil and English - 2

Question: 6

Comparison of Fraunhofer lines with the absorption spectra of known element reveals

(A) The rarer earth elements

(B) The elements present in the sun's atmosphere

(C) The elements present in the moon's atmosphere

(D) The elements present on the earth

Question: 7

A linear source of light gives rise to ______ wavefront.

(A) Plane

(B) Semicircular

(C) Spherical

(D) Cylindrical

Question: 8

In a discharge tube with perforated cathode rays and canal rays travel

(A) In circular paths

(B) At right angles to each other

(C) In opposite direction

(D) In same direction

Question: 9

The circular metal plates are held together by

(A) Glass rods

(B) Glass or ebonite rods

(C) Brass rods

(D) Ebonite rods

Question: 10

The intensity of X-rays depends upon

(A) Number of electrons striking the target

(B) Thickness of the target

(C) The target material used

(D) None of the above