JEE Main 2013 — Current Electricity Question with Solution
From: JEE Main 2013 (Offline)
Question
The supply voltage to room is The resistance of the lead wires is . A bulb is already switched on. What is the decrease of voltage across the bulb, when a heater is switched on in parallel to the bulb?
Choose an option
Show full solutionCorrect option: D
Correct answer
D Volt
Step-by-step explanation
Power of bulb
Resistance of bulb
Power of heater (given)
Resistance of heater
Voltage across bulb before heater is switched on,
volt
Voltage across bulb after heater is switched on,
volt
Hence decrease in voltage
Volt (approximately)
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This is a previous-year question from JEE Main 2013, covering the Current Electricity chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.