find R if power dissipated is 1000w
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Answer: resistance = R + 20*48/68
v =250 volt
p = 1000 watt= v^2/resistance
=> 1000 =( 250 * 250) / R+( 480/34)
4 * { R + 480/34} = 250
R + 240/17 = 250/4
R = 250/4 - 240/17
R = 62.5 - 14. 11
R = 48.39 ohm
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