ELCT801 Electronics for Biotechnology
Assignment (1)
Name
ID
Note:
Please print and solve in this sheet, delivery on other prints will not be accepted
Dead line for delivery is Thursday 19/4/2012 at the TA’s room C7-010
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Problem (1):
In the circuit shown in figure below, if the power delivered by the 6V source is -18W
Use KCL and KVL to find the unknown resistance R.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Problem (2):
For the circuit shown in the figure below:
a) Write the node-voltage equations for the three nodes V1, V2 and V3
b) Calculate the power delivered or absorbed by each source.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question (3):
Find Req at terminals a-b.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question (4):
Using KCL and KVL, Find I o in the circuit shown.
6Ω
6Ω
12 V
12 Ω
6Ω
Assignment 1 – Spring 2012
Io
12 Ω
6Ω
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Electronics for Biotechnology ELCT801t
Question (5):
Using KCL and KVL, Find
Io
in the circuit shown.
2Ω
Io
3Ω
9Ω
12 Ω
36 V
12 Ω
4Ω
5Ω
18 Ω
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question (6):
Find i, v and the power dissipated in the 6
Assignment 1 – Spring 2012
resistor in the following figure.
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Electronics for Biotechnology ELCT801t
Question (7):
Find v and i in the following figure.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question (8):
For the given schematic diagram
a) Draw the equivalent circuit
b) Write the equation for Voutput
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question (9):
The circuit shows an emergency light source. A 6V battery is charged with 12VDC
supply, R1 & R2 applies a voltage drop of 6 volts. The LED acts as a charging indicator.
Redraw the circuit by adding a switch such that:
- When the switch is ON position the lamp is ON and no charging to the battery.
- When the switch is OFF the charging current is applied to the battery and the
lamp is OFF.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t
Question 10:
a) Draw the circuit diagram for the above printed circuit board.
b) Which resistors are in series?
c) Show how on the drawn circuit to interconnect the pins to put all resistors in
series.
Assignment 1 – Spring 2012
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Electronics for Biotechnology ELCT801t