Question Detail

Which law is also called law of inertia ?

Newton first law
Newton second law
Newton third law
All of above

Answer: Option A

1. The rotational effect of a force on a body about an axis of rotation is described in terms of

Centre of gravity
Centripetal force
Centrifugal force
Moment of force

Answer: Option D

2. What is Hooke's Law ?

Stress is inversely proportional to strain.
Stress is directly proportional to strain.
Stress and strain are dependent on each other.
Stress and strain are independent of each other.

Answer: Option B

3. K. Macmillan invented

Bicycle
Barometer
Calculating Machine
Centigrade Scale

Answer: Option A

Explanation:

K. Macmillan of Scotland invented Bicycle in 1839.

Barometer was invented by E. Torricelli of Italy in 1644.

Calculating Machine was invented by Pascal of France in 1642.

Centigrade Scale was invented by A. Celsius of France in 1742.

4. Which of following in not a property of cathode ray.

Cathode rays are invisible and travel in a straight line.
These rays can ionise gases.
These rays can penetrate through thin metal foils.
These rays make materials cool on which they fall.

Answer: Option D

Explanation:

These rays heat the materials on which they fall.

5. What is unit of Work and Energy ?

Joule
kilogram
amphere
meter

Answer: Option A