TNPSC Physics Quiz - 2

Question: 6

Relation between the colour and the temperature of a star is given by

(A) Hippacrus rule

(B) Hubble’s law

(C) Planck’s law

(D) Wean’s displacement law

Question: 7

At dew point RH is

(A) 0%

(B) 100%

(C) 50%

(D) 25%

Question: 8

A fan produces a feeling of comfort during hot weather because

(A) Conductivity of air increases

(B) Our body radiates more heat in air

(C) Our perspiration evaporates rapidly

(D) Fan supplies cold air

Question: 9

The amount of heat required to raise the temperature of a body through 1k is called, its

(A) Water equivalent

(B) Entropy

(C) Thermal capacity

(D) Specific heat

Question: 10

If a substance contracts on heating , its co-efficient of linear expansion is

(A) + ve

(B) – ve

(C) Zero

(D) Infinity