Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : n-p-n transistor permits more current than a p-n-p transistor.

Reason R : Electrons have greater mobility as a charge carrier.

Choose the correct answer from the options given below :

For a transistor to act as a switch, it must be operated in

Identify the correct Logic Gate for the following output (Y) of two inputs A and B.

The positive feedback is required by an amplifier to act an oscillator. The feedback here means :