Exercise 1

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Suppose you are given the circuit shown below.

The current I1 is 15/7 A, and I2 is 10/7 A.

• By symmetry, what are I4 and I5?
• What is I3?

Write in your journal why I3 has the direction shown.

• Find the potential difference between points b and c.
• If the 4 ohm resistors in the circuit are replaced with 2 ohm resistors, what will the potential difference between points b and c be? What will I3 be?
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If the grounded point is at V = 0, find the potential of points a, b, c and d.

Go to Charging a Capacitor.

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