Download Parallel Circuits KEY

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Parallel Circuits
1.
What is different between series and parallel circuits? List two advantages of parallel
circuits over series circuits.
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2.
A parallel circuit is a circuit with more than one path over which the current
may flow, while a series has one.
Each device in the circuit has the same voltage drop as the voltage source and
Each device in the circuit may be turned off independently.
What is the same for all branches of a parallel circuit?
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All branches have the same voltage.
3.
Draw the circuit diagram for a circuit containing two bulbs in parallel.
4.
Use the parallel circuit pictured to the right to answer the following questions.
a. What is the voltage across each bulb?
V = 12 V
b. What is the current in each branch?
c. What is the total current provided by the battery?
It = I1 + I2 = 6 A + 6 A = 12 A
d. Calculate the total resistance in the circuit.
5.
Use the parallel circuit pictured to the right to answer the following questions.
a. What is the voltage across each bulb?
V = 12 V
b. What is the current in each branch?
c. What is the total current provided by the battery?
It = I1 + I2 = 6 A + 4 A = 10 A
d. Use the total current and the total voltage to calculate the circuit’s total resistance.