A car fuse marked 3A operates optimally on a 12V battery, calculate the resistance of the fuse

Assessment: WAEC SSCE - Physics - 2004 (Objective) Subject: Physics

Question 1 Report

A car fuse marked 3A operates optimally on a 12V battery, calculate the resistance of the fuse
Answer Details
The formula for calculating resistance is: R = V/I where R is resistance, V is voltage and I is current. Given the fuse is marked 3A, it means it can carry a maximum current of 3A. Also, the voltage of the battery is given as 12V. Using Ohm's law, we can calculate the resistance of the fuse as follows: R = V/I = 12V / 3A = 4.0Ω Therefore, the resistance of the fuse is 4.0Ω.

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