Gate Questions paper 2022 with answer
1:- In the circuit shown below, the initial charge on the capacitor is 2.5 mC, with the voltage polarity as indicated . The switch is closed at time t = 0 the current it at a time t after the switch is closed is (A) i(t)=15 exp(-2×10³t)A. (B) i(t)= 5 exp(-2×10³)A. (C) i(t) =10 exp(-2×10³)A. (D) i(t) = -5 exp(-2×10³)A. ANSWER :- i(t)=15 exp(-2×10³t)A 2:- The Z- parameter matrix [z¹¹z¹² z²¹z²²] for the two port network shown is (A):- 0 (B):- 99 (C):- 63 (D):- 12 ANSWER:- 0 3:- If Ē = -(2y³-3yz²)x^ -(6xy²-3xz²)6y^+(6xyz)z^ is the electric field in a source free region a valid expression for the electrostatic potential is (A):- xy³-yz² (B):- 2xy³-xyz² (C):- y³+xyz² (D):- 2xy³-3xyz² ANSWER:- 2xy³-3xyz² 4:- Two Silicon diodes,with a forward voltage drop of 0.7 v are used in the circuit shown in the figure. The range of input voltage Vi for which the output Voltage Vo= Vi,is (A):- -0.3 V <Vi<1.3V (B):- -0.3 V < Vi