11. What is the approximate resistance of a rheostat if the voltage source is 18 V and the current is 220 mA? A. 8.2 kΩ B. 820 Ω C. 8.2 Ω D. 82 Ω Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
12. A resistance of 3.3 MO 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 & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
13. An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately A. 385 Ω B. 38.5 Ω C. 3.1 Ω D. 31 Ω Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
14. A current of 200 µA through a 6.8 kΩ resistor produces a voltage drop of A. 34.4 V B. 340 V C. 13.6 V D. 1.36 V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
15. How much voltage is needed to produce 2.5 A of current through a 200 Ω resistor? A. 50 V B. 500 V C. 80 V D. 8 V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
16. Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor? A. 4 Ω B. 400 Ω C. 4 kΩ D. 4.4 Ω Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
17. How much resistance is needed to draw 17.6 mA from a 12 volt source? A. 212 Ω B. 6.8 kΩ C. 68 Ω D. 680 Ω Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
18. The formula for finding resistance when current and voltage are known is $${\text{R}} = \frac{{\text{I}}}{{\text{V}}}.$$ A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
19. The formula for finding voltage when resistance and current are known is $${\text{V}} = \frac{{\text{I}}}{{\text{R}}}.$$ A. True B. False Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
20. When there is 12 mA of current through a 1.2 kΩ resistor, the voltage across the resistor is A. 14.4 V B. 1.4 V C. 100 V D. 10 V Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board