Tiêu đề SES 2021 PAPER 2 ELECTRICAL ENGINEERING_A.pdf ✅

SET-A [ A-3 ] CO-ENG-ELEC 1. For the given circuit, the value of V1 will be : 16 Ω 54 Ω 36 Ω 18 Ω V1 80 V + – (A) 12 V (B) 24 V (C) 80 V (D) 53.3 V 2. Find the Thevenin’s equivalent resistance for a DC supply that has a 30 V terminal voltage when delivering 400 mA and 27 V terminal voltage when delivering 600 mA: (A) 5 Ω (B) 10 Ω (C) 15 Ω (D) 3 Ω 3. For the given circuit, what is the value of R3 in equivalent-delta connection? ≡ C R3 B A C B A 12 Ω 15 Ω 18 Ω (A) 44.4 Ω (B) 37 Ω (C) 55.5 Ω (D) 15 Ω
SET-A [ A-4 ] CO-ENG-ELEC 4. Network equation of the equivalent circuit shown in the figure is : M L2 L1 i 2 e2 e1 i 1 (A) 1 2 1 1 di di eL M dt dt = + (B) 1 2 1 1 di di eL M dt dt = − 2 1 2 2 di di eL M dt dt = + 2 1 2 2 di di eL M dt dt = − (C) 1 2 1 1 di di eL M dt dt = + (D) 1 2 1 1 di di eL M dt dt = − 2 1 2 2 di di eL M dt dt = − 2 1 2 2 di di eL M dt dt = + 5. For an AC circuit, Thevenin’s equivalent open-circuit voltage and Norton’s equivalent short-circuit current across terminal ab are found to be 3.47 V and 0.71 A respectively. The magnitude of ZTh will be : (A) 0.049 Ω (B) 0.49 Ω (C) 4.9 Ω (D) 49 Ω 6. For the given Laplace transform 3 2 5432 17 7 6 ( ) 3542 s ss Y s sssss + ++ = ++++ the initial and final value of the corresponding time function y(t) will be : (A) 0, 0 (B) 0, 3 (C) 3, 0 (D) 3, 3