PHY2061
R. D. Field
Problems
Chapter 31
Page 1 of 3
R
1
= 4
Ω
24 V
R
2
= 12
Ω
R
0
= 3
Ω
Chapter 31 Problems
Problem 1:
How much current passes through the
1
Ω
resistor in the circuit shown in the
Figure
?
r
r
r
A
B
r
r
r
r
r
r
r
r
R
r
Problem 2:
Consider the infinite chain of resistors shown in the
Figure
.
Calculate the
effective resistance,
R
, (
in Ohms
) of the network between the terminals
A
and
B
given that each of the resistors has resistance
r = 1 Ohm
.
Problem 3:
Consider the circuit consisting of an EMF
and three resistors shown in the
Figure
.
How much current flows through the
4
Ω
resistor (
in Amps
)?
Problem 4:
A constant power
P
is supplied to a transmission line of resistance
R
by a
power station.
If the power dissipated in the transmission line is
200 Watts
when the power station delivers an
EMF
of
10 Volts
, how much power is
dissipated in the transmission line (
in W
) when the power station delivers
an
EMF
of
20 Volts
(assuming the same power is supplied in both cases)
?
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 Spring '08
 FRY
 Physics, Current, Energy, Volt, Electrical impedance, Series and parallel circuits

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