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JEE Main 2013 Physics question

PhysicsCurrent ElectricityJEE Main 2013

The supply voltage to a room is 120 V. The resistance of the lead wires is 6Ω. 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 ?

Answer: (2)

Solution

. Initial V. With heater

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Question ID VK-000837