Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
The thermometer whose reading is indicated by a change in color of its thermometric property is the?
bi-metalic strip thermometer
thermocouple
platinium resistance thermometer
optical pyrometer
Correct answer is D
A pyrometer is instrument for measuring high temperature.
The optical pyrometer is one in which the luminous radiation from the hot body is compared with that from a known source.
1400 kgm-3
1250 kgm-3
500 kgm-3
1000 kgm-3
Correct answer is B
Weight of glycerine displaced = weight of water dispalced
Mgh glycerine = Mgh water
Pvgh glycerine = Pvgh water
0.4V P glycerine = (0.5v)/v.4v P water = 1.25
(Polycerine)/p water =
But density of substance = relative density x density of water = 1. 25 x 1000kgm3 = 1250kgm-3
If a load of mass 10N stretched a cord by 1.2cm, what is the total work done?
6.0 x 10-2J
7.6 x 10-2J
1.8 x 10-2J
6.6 x 10-2J
Correct answer is A
Work done on a stretched cord
= Average force x extension
= \(\frac{1 \times 10 \times 0.012}{2}\)
= 6.0 x 10\(^{-2}\)J
I and III only
II and III only
III and IV only
I and II only
Correct answer is C
pressure in fluid is given by P = hpg.
∴ fluid pressure depends on height of liquid column, h, density of liquid p and acceleration of free fall g. it is therefore independent of type of container and constituents of the liquid.
3.0
3.1
3.2
2.0
Correct answer is D
V.R = \(\frac{1}{sinθ}\)
= \(\frac{1}{sin 30°}\)
= \(\frac{1}{0.5}\)
= 2