Calculate the work done by a 6.0-v battery as it charges a 7.6-μf capacitor in the flash unit of a camera.

The work done by the battery to charge the capacitor is equal to the electric potential energy stored in the capacitor at full charge, which is given by:

where 
is the capacitance of the capacitor
is the voltage across the capacitor (which corresponds to the voltage of the battery)

By substituting the numbers into the equation, we find the work done:

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.