Lesson 4: How Voltage Functions in DC Parallel Circuits

Calculate the total current for the circuit.

1 A

What is the total voltage of this circuit if each battery is 12 volts?

12 V

Power sources connected in parallel should have the same ? rating.

D. Voltage

What will happen to the voltage applied to resistor R2 if the circuit opens at Point A?

Note: This statement is true since the source voltage for this branch is a direct connection to the circuit source voltage and is not dependent on the branch which supplies R1. The correct answer is: The voltage applied to R2 would not change.

The voltage applied to each load in a parallel circuit is the same.

True

What would happen if the circuit opened at Point B?

a. R1 and R2 would be disconnected from the source and no current would flow.

Determine the voltage across resistor R2.

15 V

For a circuit to be considered a parallel circuit, there must be at least ? path(s) for current to flow.

2

What is the voltage of the source if each resistor has a resistance of 100 Ω and the current through each resistor is 3 amps?

300 V

Students learned that in a series circuit, if one of the loads opened or burned out, current ceased to flow through the other loads. This is also true for parallel circuits.

False

The current through each branch in a parallel circuit is equal to the total current.

False

Circuit components that are connected in such a way that they provide different current paths are said to be connected in parallel.

True

If the resistance value and current through one load resistor in a parallel circuit are known, this information would help in solving for voltage in other components in the parallel circuit.

True

Parallel circuits may contain more than one load.

True

Parallel circuits may contain more than one voltage source.

True

A parallel circuit is one in which there is more than one point where the ? divides and follows different paths.

a. current

In a parallel circuit, the entire ? is dropped across each branch.

b. circuit current

The current through any branch of a parallel circuit will be ? the total circuit current.

b. less than

Which of the statements are true regarding the circuit?

c. I., III., and IV.

When two voltage sources are connected in parallel in a circuit, the positive terminal of the first source should be connected to the negative terminal of the second source.

false