21)

Newton’s laws of motion is the scientific principle used in

Class 11 Physics

A)

Rocket propulsion

B)

Electric generator

C)

Computers

D)

None

22)

Electric generator is based on the scientific principle

Class 11 Physics

A)

Faraday’s laws of electromagnetic induction

B)

Superconductivity

C)

Newton’s laws of motion

D)

None

23)

Reflection of ultrasonic waves this principle is used in

Class 11 Physics

A)

SOLAR

B)

SONAR

C)

RADAR

D)

Optical fibre

24)

The principle of total internal reflection is used in

Class 11 Physics

A)

Optical fibre

B)

Sonar

C)

Electron microscopy

D)

Photoelectric effect

25)

The scientific principle of wave nature of electron is used in

Class 11 Physics

A)

Photoelectric effect

B)

Optical fibre

C)

Computers

D)

Electron microscope