# Ohm’s Laws – Exercise – 1

Ohm’s Laws » Exercise – 1

1. Ohm’s law is not applicable to : (a) semi-conductors. (b) DC circuits (c) high currents (d) small resistors

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2. 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? (a) 2 mA (b) 2.2 mA (c) 214 mA (d) 21.4 mA

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3. 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

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4. If 750 µA is flowing through 11 kΩ of resistance, what is the voltage drop across the resistor? (a) 8.25 V (b) 82.5 V (c) 14.6 V (d) 146 V

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5. The formula to find I when the values of V and R are known is ________. (a) I = VR (b) I = R/V (c) V = IR (d) I = V/R