Q.4) A coil having 20 turns has an induced emf of 4 mV when the current is changing at the rate of 2 A/s. What is the inductance?
Q.6) If a power company charges 0.1$ for each KWh of energy delivered to a customer. Find the total cost of operating a 500 W television set for 2 h, six 75 W light bulbs for 4 h. a 1500 W clothes drier for 30min and a 2 KW electric heater for 45 min?
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