1.
In the radioactive decay of a nucleus, an electron is emitted because-
2.
The pressure at the bottom of a liquid tank is independent of-
3.
A person standing in front of a mirror finds his image thinner but with normal height. This effect is due to the mirror of--
4.
The absolute zero temperature on the Celsius scale is-
5.
When two capillary tubes of varying diameters are immersed in water, the height to which the water rises is-
6.
A mirage observed in a desert is caused by the phenomenon of-
7.
Which type of glass is capable of blocking ultraviolet rays?
8.
Laser light is considered coherent because it consists of-
9.
Diopter is the unit of-
10.
If a ray of light strikes a plane mirror at an angle of 30° to the mirror, the angle of reflection will be-
11.
When a stone is dropped into still water, the resulting waves are-
12.
In which of the following processes does the internal energy of a system remain constant?
13.
The Doppler effect is independent of-
14.
The movement of a liquid column oscillating in a U-tube is known as-
15.
When the distance between two masses is doubled, the gravitational force between them becomes-
16.
A white and smooth surface is known to be-
17.
Which type of molecular motion does not contribute to the internal energy of a system?
18.
When a metal ball is weighed in a liquid whose temperature is steadily increased, the apparent weight of the ball-
19.
Ultrasonic waves can be detected using-
20.
When a large magnet is broken into two pieces with lengths in the ratio of 3:4, the ratio of their pole strengths will be-
21.
The connection between a star's color and its temperature is represented by-
22.
When a sound source moves toward a stationary observer, it causes-
23.
The wavelength of radiation emitted by a body depends on-
24.
As the temperature increases, the speed of sound in a gas-
25.
X-rays are strongly absorbed by lead atoms, but barium sulfate is typically given to patients for X-ray photographs of the stomach instead of lead salts because-
