A metal plate is getting heated. It can be because

A metal plate is getting. It can be because

A metal plate gets heted, when cathode rays strike against it due to

If a uniform metal plate with a hole in it heated then explain how the size of the hole gets effected?

There is a hole in a metal plate. Upon heating the plate, the diameter of the hole

When a metal rod is heated it expands because

Heating a plate. When a circular plate of metal is heated in an oven, its radius increases at the rate of 0.01cm//"min" . At what rate is the plate's area increasing when the radius is 50 cm ?