Which of the following corresponds to Joule's law of heating?

1. I²R
2. I²Rt
3. V²Rt
4. IR²t

Assertion: Current is the rate of flow of charge.

Reason: Electric current will not flow between two charged bodies when connected, if they are at the same potential

1. Both Assertion and Reason are true.
2. Both Assertion and Reason are false.
3. Assertion is false but Reason is true.
4. Assertion is true but Reason is false

Which of the following is not a type of equilibrium ?

1. Static
2. Dynamic
3. Neutral
4. Rolling

The correct descending order of the electro magnetic waves according to their wavelengths is

1. UV-rays, γ-rays, microwaves, infrared
2. infrared, microwaves, UV-rays, γ-rays
3. γ-rays, UV rays, Infrared rays, microwaves
4. microwaves, infrared rays, UV rays, γ-rays