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Current and circuits
Lower Sec Science · Secondary 2 · Medium · Current and circuits
A circuit has a cell, a switch and a bulb connected in series. When the switch is closed, the bulb lights up. Which statement best explains why the bulb lights?
- Closing the switch completes the circuit so current can flow through the bulb.
- Closing the switch increases the voltage of the cell.
- Closing the switch reduces the resistance of the bulb to zero.
- Closing the switch makes the bulb produce its own charges.
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