Discussion
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- Question
An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately
Options- A. 385 Ω
- B. 38.5 Ω
- C. 3.1 Ω
- D. 31 Ω
- Correct Answer
- 31 Ω
- 1. If you wish to increase the amount of current in a resistor from 120 mA to 160 mA by changing the 24 V source, what should the new voltage setting be?
Options- A. 8 V
- B. 320 V
- C. 3.2 V
- D. 32 V Discuss
- 2. A resistance of 3.3 MΩ is connected across a 500 V source. The resulting current is approximately
Options- A. 15.1 µA
- B. 151 µA
- C. 66 mA
- D. 660 mA Discuss
- 3. If 24 V are applied across a resistor and there are 10.9 mA of current, the resistance is
Options- A. 220 kΩ
- B. 22 kΩ
- C. 2.2 kΩ
- D. 220 Ω Discuss
- 4. How much current is produced by a voltage of 18 kV across a 15 kΩ resistance?
Options- A. 1.2 A
- B. 12 A
- C. 120 mA
- D. 12 mA Discuss
- 5. What is the approximate filament resistance of a light bulb if it operates from a 110 V source and 0.6 A of current is flowing?
Options- A. 183 Ω
- B. 18.3 Ω
- C. 66 Ω
- D. 6.6 Ω Discuss
- 6. A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of
Options- A. 34.4 V
- B. 340 V
- C. 13.6 V
- D. 1.36 V Discuss
- 7. A series circuit consists of three resistors with values of 120 Ω, 270 Ω, and 330 Ω. The total resistance is
Options- A. less than 120 Ω
- B. the average of the values
- C. 720 Ω
- D. 120 Ω Discuss
- 8. Two resistors are in series: a 5.6 kΩ resistor and a 4.7 kΩ resistor. The voltage drop across the 5.6 kΩ resistor is 10 V. The voltage across the 4.7 kΩ resistor is
Options- A. 8.39 V
- B. 10 V
- C. 2.32 V
- D. 0 V Discuss
- 9. Two 6 V batteries are connected series aiding across two 1.2 kΩ resistors in series. Current through each resistor is
Options- A. 5 mA
- B. 10 mA
- C. 0 A
- D. 2.5 mA Discuss
- 10. When a fourth resistor is connected in series with three resistors, the total resistance
Options- A. increases by one-fourth
- B. increases
- C. decreases
- D. remains the same Discuss
Ohm's Law problems
Search Results
Correct Answer: 32 V
Correct Answer: 151 µA
Correct Answer: 2.2 kΩ
Correct Answer: 1.2 A
Correct Answer: 183 Ω
Correct Answer: 1.36 V
Correct Answer: 720 Ω
Correct Answer: 8.39 V
Correct Answer: 5 mA
Correct Answer: increases
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