=========================preview======================
(ELEC102)test1_paste.pdf
Back to ELEC102 Login to download
======================================================
1

(18)

(5)

(4)

(3)



Text Box: (a) A digital multi-meter (DMM) with a bandwidth of 10kHz is used to measure a 2sin(2.10kt) V signal. What is the

Text Box: (c)

(8)

2

Vo(t)


Text Box: a. In the circuit, find Vo(t). Find also the energy stored in the inductor. (8)
Text Box: (4)

Text Box: i(t)=10A

Text Box: (a)

Text Box: (4)

(18)

2



Text Box: b. In the circuit, if X = 3.YF and I(t) is given as shown.Determine and label clearly the waveform of the voltage V(



Text Box: (8)

Text Box: c) Find I . Find also the power consumed or delivered by Y. Is Y a passive element? (9)
Text Box: I = - 2A

Text Box: Hence the slope is 10V/2ms

(18)

3

3k.

4k.

36V

4k.

4k.

6k.

3k.

4k.

12mA

2k.

4k.

12mA

6k.

2k.

8mA


Text Box: 3. Use Superposition Method to find Io . (18)










Text Box: (8)
Text Box: (2)

4

(13)

3mA

1k.

6V

1k.

3mA

-1V

5V



Text Box: 4. Find Io. (13)



Text Box: Apply KVL to 6V mesh



(13)

2k.

6mA

6mA

12V

3mA

2k.

5

(13)

6mA




Text Box: 5. In the circuit, use node voltage method to find V1. (13)






(21)

4.

8A

32V

0V

24V

6A

4A

8V

4.

8A

6

8V

4.

4.

(7)

(4)

(3)

8A

4.

(3)

(4)

4.

16V

0V

8V

2A

8A






Text Box: 6. (a) Show that the open circuit voltage at terminals ab = 32V. Hence find the Thevenin equivalent at terminals ab










Text Box: (a)
Text Box: (b)
Text Box: (c)

7

(4)

(15)

12V

2k.

1mF

2k.

V

(2)

i

(5)

12V

2k.

2k.

V

i

1k.

1k.

(4)




Text Box: t < 0, S is closed

Text Box: In the circuit, the switch has been closed for a long time. At t = 0 sec, the switch is opened. Find i(0), i(.V),


Text Box: t .d 0, S is opened






8

(15)

(4)

(5)

(2)


Text Box: t < 0
Text Box: In the circuit, at t = 0 sec, the switch is switched from terminal a to terminal b.Find V(0) , V(.V), i(0), and

Text Box: t .d 0







4V

3mA

3mA

Io

4V

9

(20)


Text Box: 9. Find Io . The dependent source (current controlled current source) is in mA and equal to 2i. (13)






Text Box: (20)

Text Box: Use superposition