Ohm’s Laws – Exercise – 1

6. Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kΩ of resistance?

(a) 27.2 mA
(b) 59 mA
(c) 5.9 mA
(d) 590 mA

Answer
Answer : (c)
Explanation
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7. The current through a flashlight bulb is 40 mA and the total battery voltage is 4.5 V. The resistance of the bulb is approximately ________.

(a) 112 Ω
(b) 11.2 Ω
(c) 1.2 Ω
(d) 18 Ω

Answer
Answer : (a)
Explanation
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8. A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately ________.

(a) 15.1 µA
(b) 151 µA
(c) 66 mA
(d) 660 mA

Answer
Answer : (b)
Explanation
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9. How much resistance is required to limit the current from a 12 V battery to 3.6 mA?

(a) 3.3 kΩ
(b) 33 kΩ
(c) 2.2 kΩ
(d) 22 kΩ

Answer
Answer : (a)
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10. If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is ________.

(a) 220 kΩ
(b) 22 kΩ
(c) 2.2 kΩ
(d) 220 Ω

Answer
Answer : (c)
Explanation
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