General Physics Questions And Answers, Set 41

 

General Physics Questions And Answers

Q1. 

When water is kept in a very hot pan, the entire water heats up. Which mode of heat transfer is responsible for this?

Ans.

Convection

Q2. 

Change of phase occurs at a constant temperature, which implies that even on addition of heat to a substance temperature remains constant. True or False?

Ans.

True

Q3. 

Getting burnt by steam is less dangerous than boiling water. True or False?

Ans.

False

Q4. 

Same amount of heat is added to two substances of same mass having specific heat capacities s1 & s2 such that s1 > s2. Select the correct statement.

Ans.

The change in temperature of 1 is less than the change in temperature of 2

Q5. 

The value of coefficient of thermal expansion is always the same for a material. True or False?

Ans.

False

Q6. 

Why can any low density gas be used in a constant volume gas thermometer?

Ans.

All low density gases show the same expansion behaviour

Q7. 

Why is mercury used in thermometers?

Ans.

It shows linear variation in volume with temperature

Q8. 

A cyclic process is always reversible. True or False?

Ans.

False

Q9. 

Pressure is a vector quantity. True or False?

Ans.

False

Q10. 

From which of the following is the working of hydraulic machines based on?

Ans.

Pascal’s Law

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