Current & Voltage Operating Semiconductor Device

Read your textbook.

You always could read the manufacturer's data sheet, too.

As a final resort, you can change the current without changing the voltage or change the voltage without changing current and observe.

You DO NOT. A device has characteristics, defined by physics. There is no choice for you. Now, you decide, how to USE a device.

Example: a power Mosfet can be used as a parallel resistor, a series resistor, a good switch, a poor capacitor. What do you want? More exactly, what can be extracted from it in a given configuration? It is not a simple question.

i know sir this is not a simple question but i want to know the basic thing that how can i detect that the device is current operating/voltage operating.

You don't seem to be willing to do your own research here, do you. I say this because without a good understanding of fundamental circuit theory it is very difficult to give you an accurate answer.

You see a single simple BJT (2N2222A) is typically considered a current sensitive device but with the inclusion of just one resistor the whole circuit can be made into something resembling a voltage sensitive device. A collection of BJT and resistors can make what is known as an operational amplifier (μA741) that operates like an ideal voltage sensitive device.

Similarly a FET (2N4416A) nominally operates as a voltage sensitive device but again just one strategically placed resistor can make the whole circuit to approximate a current sensitive device.

A very general answer to your question is that a Bipolar Junction Transistor (BJT) is controlled with current, and a Field Effect Transistor (FET) is controlled with voltage.