KVL, KVL, and Ohm’s Law
Problem 1
a)
In the circuit below, resistor R is increased. What happens to the following quantities? (Circle the
appropriate answer.)
V
R1
R
R2
R3
•
Power dissipated in R1
increases
decreases
stays the same
•
Power dissipated in R2
increases
decreases
stays the same
•
Power supplied by voltage source
increases
decreases
stays the same
•
Voltage across R3
increases
decreases
stays the same
b)
Find the power associated with each element in the circuit below. State whether each source is
supplying or absorbing power.
10V
5A
2I
1
5V
1
10A
I
1

V
1
+
Element
Voltage
Current
Power
Absorbed or
delivered
5A source
Dependent source
5V
1
Dependent source
2i
1
10V source
10A source
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View Full Documentc)
For the circuit below, V
A
and V
B
are defined relative to the reference node as shown.
Find the
requested quantities.
Switches A and B are
open
V
A
= ___________
V
B
= ___________
Power dissipated
in
R
1
=________
Switch A is closed, B
is open
V
A
= ___________
V
B
= ___________
Power dissipated
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 Fall '06
 MCCANN
 Power, Volt, Resistor, Electrical resistance, Voltage source, R1 Power

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