1.
When a person stands on feet, the pressure on the surface is 'p'. What will be the pressure when the person stands on just one foot?
2.
Why does a person experience a strong shock when accidentally touching a live wire carrying 220V?
3.
A stationary wave is formed by-
4.
A girl is swinging on a swing while sitting. How will the time period of the swing change if she stands up?
5.
Particles that can be added to the nucleus of an atom without altering its chemical properties are-
6.
The unidirectional property of a p-n junction is useful for its application as a-
7.
Clouds float in the atmosphere due to their low-
8.
Ampere is the unit of-
9.
A semiconductor device is connected in series with a battery and a resistor. Current flows through the circuit, but when the battery's polarity is reversed, the current drops to zero. What could the device be?
10.
When cathode rays enter an electric field perpendicular to the lines of force, their path becomes-
11.
Fat can be separated from milk in a cream separator due to-
12.
A liquid drop tends to assume a spherical shape because of-
13.
How many images will a man see if he stands between two plane mirrors inclined at an angle of 60°?
14.
The cooling system (radiator) in a motor car works on the principle of-
15.
A gas-filled balloon bursts more easily with a needle than with a nail because-
16.
A superconductor has a conductivity that is-
17.
A lens becomes invisible when immersed in a liquid if-
18.
A transformer operates with-
19.
Parsec is the unit of-
20.
Planet A has double the radius of Planet B, and its mass is four times greater than Planet B. Which of the following statements about the weight of an object on these planets is correct?
21.
If the intensity ratio of two waves is 25:9, the ratio of their amplitudes is-
22.
A real gas can be liquefied by applying pressure when its temperature is-
23.
A geostationary satellite should be launched in such a way that it moves from-
24.
The value of which of the following quantity remains the same in all systems of units?
25.
Which type of lens is used in movie projectors?
