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1636 Answer Key
5
(a)
7
3.2 Ω, 2.19 A
9
(b), (d)
11
9.72 × 10−8 Ω·m
13
18 Ω
15
10:3 or 3.33
Chapter 21
Problems & Exercises
1
(a) (b)
3
(a)
(b)
5
7
(a) (b) 9 (a) (b) 11
(a)
0.74 A 0.742 A
60.8 W 3.18 kW
(b)
so that
,
13
(a)
(b) Resistance cannot be negative.
(c) Series resistance is said to be less than one of the resistors, but it must be greater than any of the resistors.
14
2.00 V
16
2.9994 V
18
21
(a) 0.658 A
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