The extremely high input impedance of a MOSFET is Primarily because of

(A) Absence of its channel
(B) Depletion of current carriers
(C) Extremely small leakage current of its gate capacitor
(D) Negative VGS

The crawling in an induction motor is caused by

(A) Improper design of the machine
(B) Low voltage supply.
(C) High loads.
(D) Harmonics developed in the motor.

The “Superposition theorem” is essentially based on the concept of

(A) duality.
(B) linearity.
 (C) reciprocity.
 (D) non-linearity.