Kilowatt hours class 10 | prove that 1kwh = 3.6MJ | punjab, federal, kpk, balochistan, sindh board скачать в хорошем качестве

Kilowatt hours class 10 | prove that 1kwh = 3.6MJ | punjab, federal, kpk, balochistan, sindh board

Kilowatt hours 10th physics chapter 14 | prove that 1kwh = 3.6MJ | urdu hindi | atif ahmed Official Kilowatt-Hour Electric energy is commonly consumed in very large quantity for the measurement of which joule is a very small unit. Hence, a very large unit of electric energy is needed which is called kilowatt-hour. It is defined The amount of energy delivered by a power of one kilowatt in one hour is called kilowatt-hour. One kilowatt-hour1 kWh= 1000 W ×1 hour =1000 W × (3600 s) 5 = 36 × 10 J=3.6 M J The energy in kilowatt-hour can be obtained by the following formula: The amount of energy in kilowatt-hour The electric meter installed in our houses measures the consumption of electric energy in the units of kilowatt-hour according to which we pay our electricity bills. If the cost of one kilowatt-hour i.e., one unit is known, we can calculate the amount of electricity bill by the following formula: Cost of electricity = number of units consumed × cost of one unit Example 14.8: Calculate the one month cost of using 50 W energy saver for 8 hours daily in your study room. Assume that the price of a unit is Rs. 12. Solution:Given that, Power = 50 W = 0.05 kW, time = 8 hours Number of units consumed = 8 × 30 × 0.05 =1 10th class physics chapter 14 Kilowatt hour Kilowatt hour 10th class physics Kilowatt hour 10th physics