Question

The bulb in a circuit glows when electric current __________

1)flows through its filament.

2)flows through the glass covering.

3)stops flowing to the bulb.

4)flows into the air through the bulb.

Answer 1

$answer$

Due to the heating effect of electric current, the bulb glows when the electric current passes through it. The filament of the bulb gets heated to a high temperature and it starts glowing.