The supply voltage in a room is 120 V. The resistance of the lead wires is 6Ω. A 60W bulb…
Physics · JEE Main · NTA Exams — Current Electricity
The supply voltage in a room is 120 V. The resistance of the lead wires is 6Ω. A 60W 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 ? Assuming the voltage across the bulb and heater is close to supply voltage.
- zero
- 2.9 V
- 13.3 V
- 10.04 V
Answer
(D) 10.04 V
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