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1. Homework Statement
a. What is the net resistance in the circuit?
b. What is the current through the 4 Ω resistor?
c. What is the voltage drop across the 3 Ω resistor?
2. Homework Equations
R12 = R1 +R2
R34 =R3 + R4
1/Rt = 1/R12 + 1/R34
I3=I4
3. The Attempt at a Solution
a) R12 = 2+ 3
R 12= 5 ohms
R34 = 4+1
R34 = 5 ohms
1/Rt =1/5 + 1/5
1/Rt = 2/5 ohms
Rt/1 = 5/2 ohms
Rt= 2.5 ohms
b) I3 =I4
I3 = 1.5 A
c) For parallel circuits, voltage is the same across. However, with two series made up in the parallel, my formula does not seem to be correct. For instance, to find V4, V =IR... V= 1.5 (1) = 1.5 V
V3 = IR ... V3= 1.5(4) = 6 V. Following this way, the voltage will not be same throughout the circuit. I am asking for some guidance on finding the voltage and solution for part c.
Thank you.
a. What is the net resistance in the circuit?
b. What is the current through the 4 Ω resistor?
c. What is the voltage drop across the 3 Ω resistor?
2. Homework Equations
R12 = R1 +R2
R34 =R3 + R4
1/Rt = 1/R12 + 1/R34
I3=I4
3. The Attempt at a Solution
a) R12 = 2+ 3
R 12= 5 ohms
R34 = 4+1
R34 = 5 ohms
1/Rt =1/5 + 1/5
1/Rt = 2/5 ohms
Rt/1 = 5/2 ohms
Rt= 2.5 ohms
b) I3 =I4
I3 = 1.5 A
c) For parallel circuits, voltage is the same across. However, with two series made up in the parallel, my formula does not seem to be correct. For instance, to find V4, V =IR... V= 1.5 (1) = 1.5 V
V3 = IR ... V3= 1.5(4) = 6 V. Following this way, the voltage will not be same throughout the circuit. I am asking for some guidance on finding the voltage and solution for part c.
Thank you.
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