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(ELEC102)test2_pastb.pdf
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(13)
1
magnitude Vm4V
Text Box: At bandwidth, V1 .l 0.7 x 2.8 Vrms
Text Box: bandwidth .l 10kHz
Text Box: (5)
Text Box: (4)
Text Box: (4)
Text Box: In the circuit, V1 versus log-frequency f is given as shown. Find roughly the magnitude of VS in V, bandwidth of D
(7)
2a
Text Box: (2)
Text Box: Find V phasor
Text Box: (2)
Text Box: Find frequency f of v(t)
Text Box: (3)
Text Box: Find period of v(t)
(31)
2b
170V
i(t) lags v(t) by 45o
Text Box: (7)
Text Box: (5)
Text Box: (3)
Text Box: Find impedance Z
Text Box: (3)
Text Box: (2)
Text Box: (5)
Text Box: 4..
Text Box: 6j..
Text Box: -2j..
(20)
3
Text Box: 1..
Text Box: (2)
Text Box: In the circuit, if , find V2(t) . The voltage controlled voltage source is in
(19)
4a
(2)
(4)
(2)
(5)
(2)
(4)
4b
Text Box: power absorbed by load A = P
Text Box: power stored by load A = Q
Text Box: power supplied by v(t) = S
Text Box: 4. Load A is connected to V(t) as shown.(a) Show that the power absorbed by load A is 400W. Find also the power st
(31)
4c
(9)
(6)
(4)
(6)
(6)
4d
Text Box: load B is capacitance
Text Box: power factor of load A = PF
(22)
(8)
(8)
(6)
7
Text Box: Use voltage divider
(28)
(7)
(3)
(2)
(6)
(8)
(2)
8b
Text Box: VO(t)
Text Box: 8a. Find VO of the 741 op amp. (10)?
Text Box: 8b. Plot VO(t). Assume ideal op amp. (18)
(30)
9b
voltage follower
(6)
(6)
9a
Text Box: Draw the circuit of an op amp voltage follower and name two advantages of the circuit. (12)
Text Box: 1. Very high input resistance2. Very low output resistance
(28)
10
(4)
Text Box: 10. Find VO and IS . Assume ideal op amp. (28)
(34)
11a
(34)
11b
(3)
(3)
(5)
(3)
(4)
Text Box: ?