Series Circuits – Exercise – 1

11. If a 6 V and a 9 V source are connected series aiding, the total voltage is ________.

(a) 6 V
(b) 9 V
(c) 3 V
(d) 11 V

Answer
Answer : (d)
Explanation
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12. Three 680 Ω resistors are connected in series with a 470 V source. Current in the circuit is ________.

(a) 69 mA
(b) 230 mA
(c) 23 mA
(d) 690 mA

Answer
Answer : (b)
Explanation
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13. The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates ________.

(a) 12 W
(b) 48 W
(c) 3 W
(d) 8 W

Answer
Answer : (c)
Explanation
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14. Four equal-value resistors are in series with a 12 V battery and 13.63 mA are measured. The value of each resistor is ________.

(a) 22 Ω
(b) 220 Ω
(c) 880 Ω
(d) 88 Ω

Answer
Answer : (b)
Explanation
Explanation : Total Resistance, r = 12 / 13.63 = 0.880 in ohms Total Resistance, r= 880 Each resistance value = r/4 = 880/4 Each resistance value = 220 ohms. Let us discuss.
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15. A series circuit has a 24 V source and a total resistance of 120 Ω. The current through each resistor is ________.

(a) 24 mA
(b) 200 mA
(c) 120 mA
(d) 20 mA

Answer
Answer : (b)
Explanation
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