In the figure below, = 9.00 V, R, = 100 Ohm, R2 = 475 Ohm, and R3 = 475 Ohm. Wha

Question

In the figure below, = 9.00 V, R, = 100 Ohm, R2 = 475 Ohm, and R3 = 475 Ohm. What is the equivalent resistance of the three resistors? What is the electric potential across resistance 1? What is the current through resistance 3? Are any of the resistors in parallel or in series? Did you redraw the circuit each time you simplified it? Once you have a simplified loop, can you get the current from a loop equation? Working backwards to get currents in individual resistors: Do parallel resistors have the same current or same potential difference? How about series resistors?

Explanation / Answer

a) equivalent resistance = (R2 || R3 ) + R1 = 475/2 + 100 = 337.5 ohm

b) I = 9/337.5 = 0.0267 A

so, potential across resistance 1 = .0267*R1 = 2.67V

c) current through resistance 3 = .0267/2 = 0.013 A

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