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(ELEC102)test1_pastf.pdf
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1

(20)

(5)

(4)

(3)

(8)

(158)



Text Box: (a) A digital multi-meter (DMM) with a bandwidth of 10kHz is used to measure a Vm*cos(2.10kt) V signal. If the DM
Text Box: (c)


(9)

+
-

1mH

I(t)

t (sec)

2




Text Box: 2. (a) X = 1H. For the given V(t), find and plot I(t). Find also the maximum energy stored in X. (9)




Text Box: (9)

Text Box: (a)



(15)

2

(3)




Text Box: 2 (b) If Y = 1mF, find i(t). Find also the power consumed or delivered by X . Is X a passive element? (15)
Text Box: active element


Text Box: (4)

3

(17)

2k.

1mH

v(t)

(4)

(3)

(3)

(3)

(4)


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

4

(17)

Vo(t)

Io(t)

Vo(t)

Io(t)

(5)

(4)

(4)

(4)


Text Box: At t = 0 sec, the switch is closed. Find Vo(0) , Vo(.V) and time constant .. ( = CR). Find also Io(t) in terms o

5

(13)

4A

1.

2.

0V

2.

4A

2.

0V

2.

4A

1.

2.

0V

-16V

2.

-8V

4V











Text Box: (14)
Text Box: 5. In the circuit, find IO . (14)


(14)

9mA

6k.

9mA

16/3 mA

11/3 mA

9mA

0V

22V

6V

9mA

6k.

6k.

I9mA

6k.

6k.

I

Vo

I6V

(6)

(6)

(2)


Text Box: 6. Use Superposition Method to find Io . (14)













Text Box: (18)


7

1.

4.

1.

3V

1.

1V

(5)

(4)

4.

3.

(5)

(5)



(14)

8

0V

-100V

60V

-36V

20.

40.

4A

60V

1.6A

4.8A

5A

0V

-100V

60V

Vo

20.

40.

4A

60V

5A







Text Box: 8. Use nodal voltage method to find Vo . (14)





9

(20)

5v

2.

5v

2.

2.

(20)




Text Box: 9. Find v . The dependent source (current controlled voltage source) is in volt and equal to 5v . (20)