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There is a desktop computer and it is connected to a mains supply by a plug containing a fuse. The computer has a metal case. A fault occurs and a live wire touches the metal case. Explain how an earth wire and the fuse in the plug protect the user.
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The earth wire provides a path for fault currents to safely dissipate into the ground, preventing electric shock to the user, while the fuse acts as a protective device, interrupting the circuit to prevent overheating and electrical hazards.
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