Work, Energy, and Power — Physics STD 11 Science — Question

What is the amount of work done in bringing a mass from the surface of Earth on one side to a point diametrically opposite to the other side?

A copper strip AB and an iron strip AC are joined at A. The junction A is maintained at 0^°C and the free ends B and C are maintained at 100^°C. There is a potential difference between:

1. The two ends of the copper strip.
2. The copper end and the iron end at the junction.
3. The two ends of the iron strip.
4. The free ends B and C.

If the temperature of the sink is increased, what will happen to the efficiency of Carnot engine?

Assume that the law of gravitation changes from inverse square to inverse cube. Does the angular momentum of a planet about the sun will remain constant?

Every SHM is periodic motion, but every periodic motion need not to be a simple harmonic motion. Do you agree? Give an example to justify your statement.

Does sound travel faster on a wet hot day or a dry cold day? Why?

Write the relationship between co-efficient of volume expansion and co-efficient of linear expansion.

Should the speed of two artificial satellites of the earth having different masses but the same orbital radius, be the same?

What is the value of modulus of rigidity for a liquid?

Which is the strongest interatomic force ?