Physics

Physics

Problem

Calculate the current flowing through a 20 Ω20\,\Omega resistor when a potential difference of 10 V10\,\text{V} is applied across it. a) 2 A2\,\text{A} b) 5 A5\,\text{A} c) 0.5 A0.5\,\text{A} d) 0.05 A0.05\,\text{A}
Intuitive explanation

This is a straightforward application of Ohm's Law, which tells you how voltage, current, and resistance relate in a circuit. The key insight is that current is directly proportional to the voltage pushing charge through and inversely proportional to the resistance opposing that flow—so higher voltage means more current, while higher resistance means less. Just rearrange the fundamental relationship to solve for the unknown current.

Intuitive explanation

This is a straightforward application of Ohm's Law, which tells you how voltage, current, and resistance relate in a circuit. The key insight is that current is directly proportional to the voltage pushing charge through and inversely proportional to the resistance opposing that flow—so higher voltage means more current, while higher resistance means less. Just rearrange the fundamental relationship to solve for the unknown current.

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