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Physics · 2013
JEE Main 2013 · 2013-04-07 Offline · Q43
The supply voltage to a room is 120 V. The resistance of the lead wires is 6 Ω. A 60 W bulb is already switched on. What is the decrease of voltage…
The supply voltage to a room is $\displaystyle 120$ V . The resistance of the lead wires is $\displaystyle 6 \Omega$. A $\displaystyle 60$ W bulb is already switched on. What is the decrease of voltage across the bulb, when a $\displaystyle 240$ W heater is switched on in parallel to the bulb ?
Official answer
(1)
10.$\displaystyle 04$ Volt
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