Unit 7 Parallel Circuits

The amount of current flowing through each resistor is directly proportional to its resistance.

• true

• false

Circuits that have more than one path for current flow are _____ circuits.

• parallel

• series

• combination

In a parallel circuit, the total current flow is equal to the _____ of the currents through all the branches.

• difference

• average

• sum

• quotient

In a parallel circuit, the total resistance is _____ value resistor.

• larger than the lowest

• less than the lowest

• equal to the largest

• equal to the lowest

The term “load” refers to the amount of _____ in a circuit branch.

• current

• resistance

• voltage

• wattage

An increase in _____, not resistance, results in an increase of load.

• power

• current

• voltage

• wattage

Imagine a water system with a holding tank, pump, and return lines. What would happen to the resistance to flow if a return path is added to the system?

• it increases

• it lessens

• it stays the same

A method for finding total resistance of parallel resistors is _____.

• product over sum

• reciprocal formula

• resistors of equal value

• all of the above

A parallel circuit is composed of two 60 Ω resistors. What is the total resistance?

• 1 Ω

• 3600 Ω

• 120 Ω

• 30 Ω

A two-branch parallel circuit has a 30 Ω and a 15 Ω resistor. What is the total resistance?

• 2 Ω

• 10 Ω

• 45 Ω

• 15 Ω