Electrical Engineering Questions and Answers March 13, 2020

Consider a square in the xyplane. The corners of the square are located at (1, 1, 0), (1, 1, 0), (1, 1, 0) and (i, 1, 0). The surface charge density e, within the square is 1.7265 x 1010xx y 1ji cm. Find the at point P (0, 0, 1).

The latching current of a thyristor circuit in Fig. Q1(c) is 50 mA. The duration ofthe firing pulse is 50 μs. Will the thyristor get fired? If the latching current in the circuit shown in Fig. Q1 (d) is 4 mA, obtain the minimum width of the gating pulse required to properly turn-on the thyristor.

20 2 100 V 0.5 H Fig Q 1(c)

1. Given Figure 1.0 and Figure 1.1 below and that bending is about the X-X axis, complete the following tasks:

1. Given Figure 1.0 and Figure 1.1 below and that bending is about the XX axis, complete the following tasks a). Construct the shear force diagram b). Using the shear force diagram construct the bending moment diagram using areas c). Construct the axial force diagram d). Determine the centroid of the section e). Determine the second moment of area

2. Consider a message signal x(t) 2 sin(200nt) 4cos(600nt) is used to modulate a carrier signal with carrier frequency of I MHz. a) Find both the time domain and the frequency domain expressions for i) DSBSC ii) DSBTC, use K 4, m 0.25 ii) PM, use k, 2nX 0.01 radVolt 1X10 HzVolt 3D iv) FM, use k, (22)X416 points) b) Plot the time domain plot