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The supply voltage to a room is 120 V. The resistance of the lead wires is 6O. 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? A) Zero Volt B) 2.9 Volt C) 13.3 Volt D) 10.04 Volt

The supply voltage to a room is 120 V. The resistance of the lead wires is 6O. 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?
A) Zero Volt
B) 2.9 Volt
C) 13.3 Volt
D) 10.04 Volt

Grade:12

1 Answers

Saurabh Koranglekar
askIITians Faculty 10341 Points
one year ago
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