Physics
The earth-wire of a cable is connected to

The outer metallic body of the appliance
The fuse of the appliance
Short circuitry of the appliance
The filament of the appliance

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Physics
Which is evidence that supports the dynamo theory?

Convection occurs in Earth's inner core
Earth's outer core contains liquid that conducts electricity
Granite and basalt conduct electricity
Earth's core contains a large amount of iron

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