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The supply voltage to a room is 120 V. The resistance of the lead wires is 6 O. 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? (1) 2.9 Volt (2) 13.3 Volt (3) 10.04 Volt (4) zero volt

The supply voltage to a room is 120 V. The resistance of the lead wires is 6 O. 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? (1) 2.9 Volt (2) 13.3 Volt (3) 10.04 Volt (4) zero volt

Grade:upto college level

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