What is the equivalent resistance between points A and B in the figure when R = 10 ?
a.
20
b.
10
c.
25
d.
15
e.
3.2
[Ques. 2] What is the equivalent resistance between points A and B in the figure when R = 18 ?
a.
48
b.
64
c.
80
d.
96
e.
110
[Ques. 3] What is the equivalent resistance between points A and B in the figure when R = 20 ?
a.
77
b.
63
c.
70
d.
84
e.
140
[Ques. 4] A 10-V battery is connected to a 15- resistor and an unknown resistor R, as shown. The current in the circuit is 0.40 A. How much heat is produced in the 15- resistor in 2.0 min?
a.
0.40 kJ
b.
0.19 kJ
c.
0.29 kJ
d.
0.72 kJ
e.
0.80 kJ
[Ques. 5] If 480 C pass through a 4.0- resistor in 10 min, what is the potential difference across the resistor?
a.
3.6 V
b.
2.8 V
c.
2.4 V
d.
3.2 V
e.
5.0 V
[Ques. 6] A certain brand of hot dog cooker applies a potential difference (120 V) to opposite ends of the hot dog and cooks by means of the joule heat produced. If 60 kJ is needed to cook each hot dog, what current is needed to cook four hot dogs simultaneously in 3.0 min?
a.
11 A
b.
2.8 A
c.
8.3 A
d.
2.1 A
e.
3.6 A
[Ques. 7] If R1 = 3.0 , R2 = 6.0 , R3 = 12 , and I = 0.50 A, at what rate is heat being generated in R1?
a.
20 W
b.
17 W
c.
12 W
d.
31 W
e.
6.0 W
[Ques. 8] If R1 = 10 , R2 = 15 , R3 = 20 , and I = 0.50 A, at what rate is heat being generated in these resistors?
a.
29 W
b.
16 W
c.
22 W
d.
11 W
e.
1.1 W
[Ques. 9] What is the equivalent resistance between points a and b?
a.
14
b.
8.0
c.
6.0
d.
25
e.
40
[Ques. 10] What is the equivalent resistance between points a and b when R = 12 ?
a.
20
b.
16
c.
24
d.
28
e.
6.0
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