**1. The formula to find current (I) when the values of voltage (V) and Resistance(R) are known is**

- I = VR
- I = V/R
- I = R/V
- V = IR

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Answer. b

**2. An electric heater draws 3.6 A from a 110 V source. The resistance of the heating element is approximately**

- 30.5 Ω
- 385 Ω
- 31 Ω
- 3.1 Ω

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Answer. a

**3. When there is 12 mA of current through a 1.2 k resistor, the voltage across the resistor is**

- 100 V
- 10 V
- 14.4 V
- 1.4 V

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Answer. c

**4. Approximately how many milliamperes of current flow through a circuit with a 40 V source and 6.8 kohm of resistance?**

- 5.9 mA
- 590 mA
- 27.2 mA
- 59 mA

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Answer. a

**5. A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?**

- 214 mA
- 21.4 mA
- 2 mA
- 2.2 mA

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Answer. d

**6. How much resistance is required to limit the current from a 12 V battery to 3.6 mA?**

- 2.2 kΩ
- 22 kΩ
- 3.3 kΩ
- 33 kΩ

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Answer. c

**7. What is the approximate resistance setting of a rheostat in which 650 mA of current flows through a 150 V source?**

- 23
- 230
- 9.7
- 97

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Answer. b

**8. What is the voltage source for a circuit carrying 2 A of current through a 36 ohm resistor?**

- 7.2 V
- 72 V
- 1.8 V
- 18 V

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Answer. b

**9. How much voltage is needed to produce 2.5 A of current through a 200 ohm resistor?**

- 80 V
- 8 V
- 50 V
- 500 V

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Answer. d

**10. If 750 µA is flowing through 11 k of resistance, what is the voltage drop across the resistor?**

- 82.5 V
- 8.25 V
- 14.6 V
- 146 V

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Answer. b