In a simple resistive circuit with a 9 V source and a 3 Ω resistor, what is the current?

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Prepare for the 3rd Year Electrical Trades Qualification (TQ) exam. Use flashcards and multiple choice questions to master the material. Each question comes with hints and explanations to help you succeed. Get set for your qualification!

Multiple Choice

In a simple resistive circuit with a 9 V source and a 3 Ω resistor, what is the current?

Explanation:
Think about Ohm’s Law for a single resistor circuit. The current through the resistor is found by I = V / R. With a 9 V source across a 3 Ω resistor, the current is I = 9 / 3 = 3 A. So the circuit carries 3 amperes from the source through the resistor. This also reflects how the voltage and resistance relate: higher voltage pushes more current, while higher resistance reduces it.

Think about Ohm’s Law for a single resistor circuit. The current through the resistor is found by I = V / R. With a 9 V source across a 3 Ω resistor, the current is I = 9 / 3 = 3 A. So the circuit carries 3 amperes from the source through the resistor. This also reflects how the voltage and resistance relate: higher voltage pushes more current, while higher resistance reduces it.

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