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Find the value of R if the power in the circuit is 1000W.(a) 10 ohm(b) 9 ohm(c) 8 ohm(d) 7 ohmI got this question in my homework.This intriguing question originated from Kirchhoff’s Laws and Network Solutions in section Network Theorems of Basic Electrical Engineering

Answer»

Right answer is (c) 8 OHM

Easy explanation: To FIND the value of I:

VI=P =>100I=1000 => I=10A.

Voltage ACROSS the 2 ohm resistor = 20V.

Voltage across the R resistor = 100-20= 80V.

R=V/I => R=80/10 = 8A.



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