# Bipolar Junction Transistors

If the switching frequency is increased for BJT what happens to the power dissipation? Will it increase, decrease, or remains the same and whats the logical reason for it?

So lets assume there is a certain voltage across the switching device, and the switch is Turned on. The voltage takes time to drop and similarly the current takes time to achieve its final value. Using $P=VI$ we can determine the switching loss.