Question

If x3- 3x2+ 3x - 7 = (x + 1)(ax2+bx + c), then a + b + c = *


3

-10

4

12

​

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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