Question
What happens to resistance of a wire when its length is
doubled (keeping area constant)?Ā ĀSolution
Resistance RāL, as per the formula R = Ļ (L/A). So, if length becomes twice and cross sectional area stays same, resistance becomes 2R.Ā Ā This relationship is critical in designing electric circuits and wires.Ā Ā It also helps explain how electric heaters work.
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