General Physics Questions And Answers, Set 43

 

General Physics Questions And Answers

Q1. 

Pressure decreases when _____

Ans.

the force decreases and/or area increases

Q2. 

Which of the following is used to measure pressure?

Ans.

Barometer

Q3. 

What is the expression for heat current? Q is heat, t is time, T is temperature.

Ans.

ΔQ/Δt

Q4. 

What is regelation?

Ans.

Refreezing of ice on reduction in pressure

Q5. 

Select the correct statement for melting of any substance.

Ans.

It requires heat to be supplied to the substance

Q6. 

Why is water used in automobiles as a coolant?

Ans.

It has a high specific heat capacity

Q7. 

What is the value of coefficient of area expansion for a sphere? Assume coefficient of linear expansion is α.

Ans.

2α

Q8. 

What is absolute zero?

Ans.

It is the temperature at which an ideal gas will have zero pressure, assuming it stays a gas

Q9. 

An ice cube is kept on the surface of an aluminium block and another ice cube on the surface of a plastic block. Both blocks have the same temperature. Select the correct statement.

Ans.

Ice will melt faster on the aluminium block

Q10. 

Which of the following is an example of reversible process?

Ans.

Frictionless to and from motion

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