1) In a house , 3 bulbs of 100 watt each are lighted for 5 hours daily , 2 fans of 50 watt each are used for 10 hours daily and an electric heater of 1.00 kWh, is used for half an hour daily . Calculate the total energy consumed in a month of 30 days and it's cost at the rate of ₹3.60/kWh
2) 5ohm , 3ohm , 7ohm resistors are connected in series with 3V battery . Calculate the voltage across 7ohm resistors . What is the voltage across the same 7ohm resistors is all 3 resistors are connected in parallel with 5V battery
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Verified answer
3×100×5+2×50×10=2.5
2.5×30×3.60=273.6