Question Detail

Radiocarbon is produced in the atmosphere as a result of

collision between fast neutrons and nitrogen nuclei present in the atmosphere
action of ultraviolet light from the sun on atmospheric oxygen
action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
lightning discharge in atmosphere

Answer: Option A

1. Solar cell converts

Sound energy into electrical energy
Electrical energy into mechanical energy
Solar energy into electrical energy
Electrical energy into light energy

Answer: Option C

2. What is unit of Electrical Capacity ?

henry
farad
volt
ohm

Answer: Option B

Explanation:

henry is unit of Magnetic Induction,

volt is unit of Potential Difference,

ohm is unit of Electric Resistance.

3. The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.

True
False

Answer: Option B

4. Lognitudinal waves and Transverse waves are types of ?

Mechanical waves
Non-Mechanical waves
Both of above
None of Above

Answer: Option A

5. Which instrument is used to measure pressure of gases ?

Manometer
Machmeter
Magnetometer
Micrometer

Answer: Option A

Explanation:

Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,

Magnetometer - is used to compare magnetic movements and fields,

Micrometer - is used to convert sound waves into electrical vibrations.