Current Electricity
It becomes more difficult to remove

Third electron from the orbit
First electron from the orbit
Any electron from the orbit
Second electron from the orbit

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Current Electricity
When current flows through heater coil it glows but supply wiring does not glow because

Supply wiring is covered with insulation layer
Resistance of heater coil is more than the supply wires
Supply wires are made of superior material
Current through supply line flows at slower speed

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