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 action of blotting paper on ink is due to
diffusion
osmosis
capillarity
surface tension
Correct answer is C
Capillarity is the tendency of a liquid to rise or fall in a narrow tube and it explains why a blotting paper absorbs ink
What is the speed of a body vibrating at 50 cyclic per second
100 πrads−1
200 πrads−1
50 πrads−1
400 πrads−1
Correct answer is A
1 cycle = 360° = 2π rad
∴ 50 cycle = 2 π rad × 50 = 100 πrad
∴ = angular speed = 50 cycles per seconds = 100 π rads−1
The instrument to measure the relative density of liquid is
thermometer
hydrometer
spring balance
beaker
Correct answer is B
Thermometer is used to measure temperature
Hydrometer is used to measure relative density of liquid.
Spring balance is used to measure the weight of an object
Beaker is used to measure or take volume of a liquid
Which of the following surfaces will absorb radiant heat energy?
white
red
black
blue
Correct answer is C
A black solution is a better radiator of heat and allow a better absorber of heat.