1) What is the formula for Ohm’s Law? a) V = I × R b) R = V + I c) V = R ÷ I d) I = V × R 2) If a current of 2 A flows through a resistor of 5 Ω, what is the voltage across it? a) 10 V b) 2.5 V c) 0.4 V d) 7 V 3) What is the current through a 240 Ω resistor connected to 120 V? a) 0.5 A b) 0.2 A c) 2 A d) 288 A 4) A device draws 0.5 A with a 120 V supply. What is its resistance? a) 240 Ω b) 60 Ω c) 120 Ω d) 480 Ω 5) Which statement best describes an ohmic conductor? a) Ratio V/I is constant b) Resistance increases with voltage c) V–I graph is curved d) Current stays the same regardless of voltage 6) A resistor follows Ohm’s Law. If voltage is doubled, current will: a) Double b) Halve c) Stay the same d) Quadruple 7) An automotive headlight draws 2.5 A at 12 V. What’s its resistance? a) 4.8 Ω b) 7.2 Ω c) 30 Ω d) 120 Ω 8) You measure 6 V across a resistor when 2 A flows. What is R? a) 3 Ω b) 4 Ω c) 8 Ω d) 12 Ω 9) Which material is considered non‑ohmic based on its V–I behavior? a) Diode or incandescent bulb b) Copper wire c) Ideal resistor d) Aluminum bar 10) Rearranged Ohm’s Law to solve for current (I): a) I = V ÷ R b) I = V × R c) I = R ÷ V d) I = V + R

Ohm's Law

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