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For a Heater Rated at 4 Kw and 220 V, Calculate: (A) the Current, (B) the Resistance of the Heater, (C) the Energy Consumed in 2 Hours, and (D) the Cost If 1 Kwh is Priced at Rs 4.60. - Science

For a heater rated at 4 kW and 220 V, calculate:

(a) the current,
(b) the resistance of the heater,
(c) the energy consumed in 2 hours, and
(d) the cost if 1 kWh is priced at Rs 4.60.

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Solution

Given: 

V=220V 

`P=4KW=4xx10^3W` 

(a) `I=P/V=(4xx10^3)/220=18.18A` 

(b) `R=V/I=220/18.18=12.1 I  ` 

(c)Energy consumed in two hours,`E=Pxxt`

                                                  `=4KWxx2h`

                                                  `=8Kwh` 

(d) cost of 1kwh= Rs 4.6 

Total cost =Energy consumed x price 

              = 8 x 4.6 

              = Rs 36.80 

  Is there an error in this question or solution?
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APPEARS IN

Lakhmir Singh Class 10 Physics (Science)
Chapter 1 Electricity
Q 20
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