Current Electricity and Electrical InstrumentHard

Question

Find the current flowing through the resistance R1 of the circuit shown in figure if the resistances are equal to R1 = 10 Ω, R2 = 20 Ω, and R3 = 30 Ω, and the potentials of points 1, 2 and 3 are equal to φ1 = 10 V, φ2 = 6 V, and φ3 = 5 V.

Options

A.0.1 A
B.0.2 A
C.0.3 A
D.0.4 A

Solution


Apply KCL for circuit  = 0
6V − 60 + 3V − 18 + 2V − 10 = 0    ⇒    11V = 88    ⇒    V = 8 V        Ans
current in resistance R1 = = 0.2 amp

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