The supply voltage to a room is 120 V. T...

The supply voltage to a room is 120 V. The resistance of the lead wires is 6 `Omega` A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?

zero Volt

2.9 volt

13.3 volt

10.04 volt

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