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  1. An electric kettle takes 4A current at 220 V. How much time will it take to boil 1 kg
  2. Work done by an external agent in separating the parallel plate capacitor is
  3. A 220 volt and 1000 watt bulb is connected across a 110 volt mains supply.
  4. A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.
  5. A light emitting diode(LED) has a voltage drop of 2 volt across it