a) Write two points of difference between electric energy and electric power.b) An electric bulb of 200 Omegadraws a current of 1 ampere. Calculate the power of the bulb the potential different at its ends and the energy in KWh consumed burning it for 5h.

a) Write two points of difference between electric energy and electric

1.	a) Write two points of difference between electric energy and electric power.b) An electric bulb of 200 Omegadraws a current of 1 ampere. Calculate the power of the bulb the potential different at its ends and the energy in KWh consumed burning it for 5h.
Answer» Solution :a) Electric ENERGY: 1) The work done or energy supplied by the source in maintaining the flow of electric current is called electrical energy. It appeare in the form of heat given by `VIt = (Vt)/(R) = VRt ` ii) It is EQUAL to the product of power and TIME ` E = P XX t` iii) Its SI units is joule (J) Electric power : i) The time rate at which electric energy is consumed or disipated by an electrical device is called electric power and is given by `P = vI = (v^2)/(R) = I^2 R` ii)It is equal to rate of doing work by an energy source. `P = w/t` iii) Its SI unit is Watt (W) 1W = `1JS^(-1)` (b)Power of the bulb Power of the bulb,` P = I^2R = (1)^2 xx 200` P= 200 W Energy consumed by bulb in 5h in burning. = Power x Time = 200 x 5 = 1000 wh= 1Kwh.