Question

An electric lamp is marked 100w ,220v it is used for 5 hours daily. Calculate (I) it's resistance while growing (ii) energy consumed in key per day

Answer 1

W=VI

=>I=W/V

   =(100/220)A

=>I=5/11A

(i)NOW, R=V/I

             R=(220)/(5/11)

               =(220*11)/5

               =44*11

               =484ohms

(ii)Now , If Energy consumed by lamp in one hour=100w

              and it used for 5 hour daily then energy consumption=(100*5)wh

                                                                                                        =500wh

                                                                                                        =0.5Kwh or

                                                                                                        =0.5unit

Answer 2

Answer:

484ohm, 2kwh

Explanation:

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