A desk lamp should have a 3A fuse fitted, but a 13A fuse has been fitted by mistake.
The lamp is not faulty.
The lamp is switched on. What happens?
1 )
The fuse blows.
2 )
The fuse does not blow but the lamp does not light.
3 )
The lamp draws too much current and the supply cables could melt.
The lamp works normally.
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