viewquestions/9264/ When we press the bulb of a dropper with its nozzle kept in water air in the dropper is seen to escape in the form of bubbles Once we release the pressure on the bulb water gets filled in the dropper The rise of water in the dropper is due to cbse class8 physics 2015
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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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