Question

Question:-
What do you need to apply across of bulb to cause a current to flow through it?​

Answer 1

We need to apply voltage from a battery across a bulb to cause a current to flow through it. Without power or a source of current, a current cannot flow through the bulb and make it glow. A voltage or its source, a battery or cell is applied across or in parallel to a bulb to make current flow through the bulb.

Answer 2

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What do you need to apply across of bulb to cause a current to flow through it?

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We need to apply a voltage across a bulb to cause a current to flow through it .

Hope it Helps!