light, heat, thermodynamics, wave motion, sound, optics & oscillations - Category wise Question and Answer Practice Test with Solutions

Question : 1

Consider the following statements:

1. A flute of smaller length produces waves of lower frequency.
2. Sound travels in rocks in the form of longitudinal elastic waves only.

a) 1 and 2 both

b) 1 only

c) 2 only

d) None

Question : 2 [PSC (Pre) 2015]

Consider the following statements.
Assertion (A):
Space based solar power (SBSP), it is suggested be made a national goal.
Reason (R):
Supply of SBSP is 99% uninterrupted throughout the year, besides the enormity of energy availability.
Select the correct answer using the codes given below.
Code

a) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

b) (A) is true, but (R) is false

c) Both (A) and (R) are true and (R) is the correct explanation of (A)

d) (A) is false, but (R) is true

Question : 3

The bulb of one thermometer is spherical, while that of other is cylindrical. If both of them have equal amount of mercury, which thermometer will respond quickly to the temperature?

a) elliptical bulb

b) spherical bulb

c) cylindrical bulb

d) both (a) and (c)

Question : 4

When water is heated from 0°C to 20°C, how does its volume change?

a) It shall decrease

b) It shall increase

c) It shall first increase and then decrease

d) It shall first decrease and then increase

Question : 5 [BPSC (Pre) 2005]

Light is made of seven colours. What is the method of separating the colours?

a) The colours can be separated by plants

b) The colours can be separated by a filter

c) The colours can be separated by a prism

d) The colours cannot be separated