hi guys,
whats the difference between a voltage and current amplifier?
Say if voltage is amplified ,the current will get amplified right?
I may be wrong please correct me.

 

There is a relationship, yes, but not fixed.

A BJT transistor is a current amplifier. Its base emitter drops a relatively constant voltage (0.6VDC), but as you vary the current it amplifies that. The base emitter barely sees any voltage change at all.

An op amp or a tube is just the opposite, it takes almost no current, but responds to voltage on it's inputs.