الفيزياء العامة الجزء الثاني#موقع الفيزياء.كوم

Direct Current Circuits
8.11) (a) Find the equivalent
resistance between points a and b in
Figure 8.27. (b) A potential
difference of 34V is applied
between points a and b in Figure
28.28. Calculate the current in each
resistor.
7Ω
4Ω
9Ω
8.14) Consider the circuit shown in
Figure 8.30. Find (a) the current in
the 20Ω resistor and (b) the
potential difference between points
a and b.
a
12Ω
12Ω
24V
b
a
10Ω
b
6Ω
6Ω
20Ω
Figure 8.27
8.12) Evaluate the effective
resistance of the network of
identical resistors, each having
resistance R, shown in figure 8.28.
a
R
R R
b
Figure 8.30
8.15) (a) In Figure 8.31 what value
must R have if the current in the
circuit is to be 0.0010A? Take &
ξ 1=2.0V, ξ 2=3.0V, and
r 1 =r 2 =3.0Ω. (b) What is the rate of
thermal energy transfer in R?
R R R
Figure 8.28
8.13) Calculate the power dissipated
in each resistor in the circuit of
figure 8.29.
ξ1
ξ2
r 1
r 2
R
Figure 8.31
18V
2Ω
4Ω
3Ω
1Ω
8.16) In Figure 8.32 (a) calculate the
potential difference between a and
c by considering a path that
contains R and ξ 2.
Figure 8.29
www.hazemsakeek.com