Question

calculate electric flux for cube of side a as shown in figure where Ex=betax^1/2 ,Ey=Ez=0 ,a=10cm and betta=900 NC^-1m^-2

Answer 1

Since P(power)= Vsquare/R.

Here we have V=220volt and P= 1000watt.

=>1000=220×220/R

=>R=220×220/1000

=>R=48.4ohm

Thus resistance of heating filament will be 48.4 ohm

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