Electric current, potential difference, Ohm's law, resistance, series/parallel circuits and power dissipation.
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Q1 · Electricity · HARD
Three resistors of 2Ω, 3Ω, and 6Ω are connected in parallel across a 12V battery. What is the total current drawn from the battery?
Q2 · Electricity · MEDIUM
Three resistors of 6 Ω, 3 Ω, and 2 Ω are connected in parallel across a 12 V battery. What is the total current drawn from the battery?
Q3 · Electricity · MEDIUM
A heating coil has a resistance of 50 Ω. If it draws a current of 4 A, what is the power consumed by the coil?