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Mutual Induction

20.The supply...

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20.The supply voltage to room is 120 V. Theresistance of the lead wires is 6 Ω . A 60 W bulbis already switched on. What is the decreaseof voltage across the bulb, when a 240 Wheater is switched on in parallel to the bulb:(2) 2.9 Volt(4 10.40 Volt(1) Zero Volt(3) 13.3 Volt

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Q. The supply voltage to a room is 120

V

. The resistance of the lead wires is 6

Ω

60 W, 120 V

bulb is already switched on. What is the decrease of voltage (in Volts ) across the bulb, when a

240 W, 120 V

heater is switched on in parallel to the bulb?

Q. The supply voltage in 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 across the bulb, when a 240 W heater is switched on in parallel to the bulb?

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120 V

. The resistance of the lead wires is

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heater is switched on?

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