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
6V − 60 + 3V − 18 + 2V − 10 = 0 ⇒ 11V = 88 ⇒ V = 8 V Ans
current in resistance R1 =
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