Questions in Current Electricity

Select	Question
	A 10 V storage battery of negligible internal resistance is connected across a $50\,\Omega $ resistor. How much heat energy is produced in the resistor in 1 hour
	A hot electric iron has a resistance of $80\,\Omega $ and is used on a 200 V source. The electrical energy spent, if it is used for two hours, will be
	The heat produced by a 100 watt heater in 2 minute will be equal to
	If two wires having resistance R and 2R. Both joined in series and in parallel then ratio of heat generated in this situation, applying the same voltage,
	Two electric bulbs A and B are rated as 60 W and 100 W. They are connected in parallel to the same source. Then,
	Three identical resistances A, B and C are connected as shown in the given figure. The heat produced will be maximum
	If 2.2kW power is transmitted through a $100\Omega $ line at $22,000V,$ the power loss in the form of heat will be
	A heater coil connected to a supply of a 220 V is dissipating some power ${P_1}.$ The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power ${P_2}.$ The ratio of power ${P_1}\,\,:\,\,{P_2}$is
	An electric lamp is marked 60 W, 230 V. The cost of a 1 kWh of energy is Rs. 1.25. The cost of using this lamp 8 hrs a day for 30 day is
	An electric iron draws 5 amp, a TV set draws 3 amp and refrigerator draws 2 amp from a 220 volt main line. The three appliances are connected in parallel. If all the three are operating at the same time, the fuse used may be of