Force, Work, Energy and Power — Physics STD 10 — Question

Name the type of energy possessed by the bob of a simple pendulum when it is at the mean position

How does the position of an element change in the periodic table when it emits out an alpha particle?

Name the principle on which functioning of a transformer depends.

State the energy changes in the following case while in use:
an electromagnet.

For which colour of white light, is the refractive index of a transparent medium (a) the least (b) the most?

Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving bus

What is the effect of pressure on the boiling point of water?

Write an expression for the electrical power spent in flow of current through a conductor in terms of current and resistance.

Is it possible that no transfer of energy may take place even when a force is applied to a body?

A fixed pulley is driven by a 100 kg mass falling at a rate of 8.0 m in 4.0 s. It lifts a load of 75.0 kgf.
Calculate : the height to which the load is raised in 4.0 s.