1. Assume the resistance values are R 1 = 2,300 ?, R 2 = 1,300 ?, R 3 = 4,300 ?,

Question

1. Assume the resistance values are

R1 = 2,300 ?, R2 = 1,300 ?, R3 = 4,300 ?, and R4 = 5,800 ?,

and the battery emf is

In the figure below, what is the current through the battery and resistor R1? Hint: First redraw the circuit so that the parallel and series resistor combinations are more obvious.
A

3.

Consider the circuit in the figure below with resistors R1 = 590 ?, R2 = 420 ?, R3 = 280 ?, and R4 = 140 ?.

What is the equivalent resistance between points A and B?
=______ ?

Explanation / Answer

1] the equivalent resistance of the circuit is to calculated first

R eq= 3151 ohms

so now the current in the circuit = V/R = 3/3151= 9.51*10^-4 A

so the current through R1= 9.51*10^-4 A

2]the equivalent resistance of the circuit = R + R/2 = 140 + 70 = 210

so the current in the circuit = 32/210= 0.15

so the current through BULB 1 = 0.15 A

and the current through Bulb 2 = 0.075 A

3]the equivalent resistance of the circuit = 776.66 ohms

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