Engineering Physics I Mock Test 3

10%

Question 1 of 10

1. If no external torque acts on a body, its angular velocity remains conserved.

True

False

Question 1 of 10

Question 2 of 10

2. Which one of the following is the property of an ionic compound?

Non conductors of electricity

High melting and boiling points

Weak inter-atomic forces

Low melting and boiling points

Question 2 of 10

Question 3 of 10

3. How many propellers are there in a helicopter?

One

No propellers

Three

Two

Question 3 of 10

Question 4 of 10

4. If the earth were to shrink suddenly, what would happen to the length of the day?

It remains the same

It increases

It decreases

It becomes unpredictable

Question 4 of 10

Question 5 of 10

5. If the diameter if the earth becomes twice its present value but its mass remains unchanged, then how would be the weight of an object on the surface of the earth affected?

1/4 W

1/3 W

1/2 W

Question 5 of 10

Question 6 of 10

6. Statement 1- An astronaut experiences weightlessness in a space satellite.
Statement 2- When a body falls freely, it does not experience gravity.

Statement 1 is true but statement 2 is false

Statement 1 and statement 2 are correct but statement 2 is not the correct explanation of statement 1

Statement 1 and statement 2 are correct and statement 2 is the correct explanation of statement 1

Both statement 1 and 2 are false

Question 6 of 10

Question 7 of 10

7. A bullet is fired and gets embedded in a block kept on the table. If a table is frictionless, then ___________

Kinetic energy gets conserved

Potential energy gets conserved

Momentum gets conserved

Kinetic energy and potential energy gets conserved

Question 7 of 10

Question 8 of 10

8. There is no atmosphere on the moon, because ___________

Escape velocity of gas molecules is greater than their root mean square velocity

It is too far from the sun and also it has very low pressure on its outer surface

Escape velocity of gas molecules is less than their root mean square velocity

It is closer to the earth and also it has inactive inter gases in it

Question 8 of 10

Question 9 of 10

9. A ball moves in a frictionless inclined table without slipping. The work done by the table surface on the ball is ___________

Positive

Infinity

Negative

Zero

Question 9 of 10

Question 10 of 10

10. Statement 1: If polar ice melts, days will be longer.
Statement 2: Moment of inertia decreases and thus angular velocity increases.

Both statement 1 and 2 are true but the statement2 is not the correct explanation of the statement1

Statement 1 and 2 are false

Both statement 1 and 2 are true and statement2 is the correct explanation of the statement1

Statement 1 is true but statement 2 is false

Question 10 of 10