The supply voltage to a room is 120 V The resistance of the lead wires is 6 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 physics 2013
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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 ? - physics 2013

 (1) zero Volt (2) 2.9 Volt (3) 13.3 Volt (4) 10.04 Volt 


By:milan-ransingh

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