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