Examine the following network containing a lamp, a capacitor and a battery. The lamp is lighted when connected directly to the battery. What happens to it in this circuit when the switch is closed.
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Explanation:
In the circuit you described with a lamp, a capacitor, a battery, and a switch, if the lamp lights up when connected directly to the battery, it means that the lamp is a resistive load that operates when a voltage is applied across it.
When you close the switch in this circuit, the following happens:
1. Initially, the capacitor is uncharged.
2. As you close the switch, the battery provides a voltage across the circuit.
3. Since the lamp is a resistive load, it immediately starts drawing current and lights up.
4. At the same time, the capacitor starts to charge, but it doesn't affect the lamp's operation in the short term.
The lamp will remain lit as long as the switch is closed and there's sufficient voltage from the battery to power it. The capacitor, in this case, acts as a passive component and doesn't have an immediate impact on the lamp's operation. It will only start to influence the circuit behavior once it's fully charged, which may take some time depending on the circuit's resistance and the capacitor's capacitance.