Consider a circuit where the batteries have zero internal resistance and the cur

ID: 2281164 • Letter: C

Question

Consider a circuit where the batteries have

zero internal resistance and the currents are

flowing in the direction indicated by the ar-

rows.

Please answer A and B.

A. Using the direction of the arrow as posi-

tive (as shown), find the current through the

14.1 resistor and the 8.4 V battery at the

top of the circuit. A negative current denotes

flow opposite to the direction of the arrow.

Answer in units of A

B, Using the direction of the arrow as positive (as

shown), find the current through the 21.3

resistor in the center of the circuit.

Answer in units of A

8.4 V 14.1 19.5 V

I1=I2+I3:Kirchoff's Current Law

using KVL across both loops

14.1*I1-8.4+21.3*I2=0

-21.3*I2-19.5=0

I1=1.97 A

I2=-0.91 A

I3=2.88 A

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