Explore topic-wise MCQs in Physics.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

1.

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.

A. The change in temperature of 1 is greater than the change in temperature of 2
B. The change in temperature of 1 is less than the change in temperature of 2
C. Both will have the same change in temperature
D. Temperature changes can’t be related with specific heat capacities
Answer» C. Both will have the same change in temperature
Discussion
2.

What should be the temperature of 1g of ice, so that when it’s added to 9g of water, lowers the temperature of water by 10°C? Sw = 1cal/ g°C, Sice = 0.5cal/ g°C, Lfus= 80cal/g.

A. 20°C
B. -20°C
C. 0°C
D. 10°C
Answer» C. 0°C
Discussion
3.

30g water at 30°C is mixed with 1g of steam at 100℃. Calculate the final temperature of the mixture. Sw = 1cal/ g°C, Lvap= 540cal/g.

A. 49.67°C
B. 38.33°C
C. 53.67°C
D. 41.33°C
Answer» B. 38.33°C
Discussion
4.

The temperature of 50g of water has to be risen from 15°C to 85°C by using steam at 120°C. What is the amount of steam, in gms, required for the same? Sw= 1cal/ g°C, Lvap = 540cal/g, Ssteam =0.48cal/g°C.

A. 6.29g
B. 8.34g
C. 7.22g
D. 6.19g
Answer» E.
Discussion
5.

What is the definition of 1 calorie?

A. It is the heat required to raise the temperature of 1g of water from 14.5°C to 15.5°C at 760mm Hg
B. It is the heat required to raise the temperature of 1g of any substance by 14.5°C to 15.5°C at 760mm Hg
C. It is the heat required to raise temperature of 1g of water by 1°C at 760mm Hg
D. It corresponds to the heat supplied at 760mm Hg for 1°C raise in temperature
Answer» B. It is the heat required to raise the temperature of 1g of any substance by 14.5°C to 15.5°C at 760mm Hg
Discussion
6.

What is the principle of a calorimeter?

A. Heat loss rate is directly proportional to temperature difference
B. The total heat lost by a hot body is same as the total heat gained by the cold body provided no heat is lost to the surroundings
C. Heat loss depends only on specific heat of a substance
D. For the same amount of heat flow from a sample to two different samples of same mass is a product of their specific heats and temperature difference
Answer» C. Heat loss depends only on specific heat of a substance
Discussion
7.

A calorimeter does not involve measurement of temperature. True or False?

A. True
B. False
Answer» C.
Discussion