Question Detail

Electric Motor converts

Electrical energy into mechanical energy
Mechanical energy into Electrical energy
Electrical energy into light energy
None of above

Answer: Option A

1. Scalar Quantities are

physical quantities which have magnitude only and no direction
physical quantities which have no magnitude only and only direction
physical quantities which have magnitude only and direction
physical quantities which have no magnitude and no direction

Answer: Option A

2. Light year is a unit of

Time
Light
Distance
Intensity of light

Answer: Option C

3. newton is used to measure

Speed
Volume
Force
Area

Answer: Option C

4. Who discovered Atom ?

Madam Curie
James Chadwick
Rutherford
John Dalton

Answer: Option D

Explanation:

John Dalton discovered Atom in 1808,

Madam Curie discovered Radium in 1898,

James Chadwick discovered Neutron in 1932,

Rutherford discovered Proton in 1919.

5. Which of the following is an electromagnetic wave ?

Cathode rays
Sound wave
Ultrasonic wave
Infra red rays

Answer: Option D