n a transistor amplifier, if the base-emitter junction is open, the collector voltage is(a) 𝑉𝐶𝐶 (b) 0V (c) Floating (d) 0.2V

In a transistor amplifier, if the base-emitter junction is open, the collector voltage is (c) Floating.

Here's why:

A transistor amplifier works on the principle of varying input current at the base-emitter junction to produce a varying output voltage at the collector-emitter junction.

If the base-emitter junction is open, it means there is no input current. Without an input current, the transistor cannot control the output voltage at the collector-emitter junction.

Therefore, the collector voltage is not fixed and is considered to be 'floating'. This means it can take any value depending on other factors in the circuit.