Question

Q3

Calculate the equivalent resistance of the circuit below if resistor R is 1500 m of 0.4mm radius copper wire (Pcopper -1.7 x

9n Mi 5-n

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Answer #1

Here , for the resistance R

R = p * L/Area

R = 1.7 *10^-8 * 1500/(pi * (0.4 *10^-3)^2)

R = 50.7 Ohm

for the net resistance

Rnet = 50.7 * 5/(50.7 + 5) + (1/(1/2 + 1/9 + 1/3)) + 10

Rnet = 15.61 Ohm

the equivalent resistance of the circuit is 15.61 Ohm

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