Unit 1-5 Lesson 4

The current flow through each of these equally sized lamps is ? .

0.75A

In the circuit, the current through the R1 resistor branch is ? and the current through the R2 branch is ? .

0.75A / 0.5A

This circuit has a 36-volt supply and six identical resistors in parallel. The total equivalent resistance is four ohms. Find the total circuit current to solve for the current through each lamp. Each lamp has a current flow of ? .

1.5A

This circuit has a current flow of ? through the switch and fuse.

1.5A

Use the law of proportionality to find the current flow through the R2 resistor. The R2 branch current is ?.

12A

This two branch circuit has a 20-ohm resistor, R1, and a resistor of unknown value, R2. With the given values, find the current flow through the R2 resistor. Then, using Ohm's Law and the found IR2 value, find the resistance of R2.

24 Ω

The current flow through the switch and fuse in this circuit is ?.

3.6A

This circuit is provided with overcurrent protection by a six-ampere cartridge fuse. Each lamp has a resistance of 12 ohms. How many of the branch switches can be closed before the fuse melts?

4

The battery bank in this circuit supplies a total current of ? to the three branch load.

4A

The current flow through the switch and fuse in this circuit is ? .

5A

This three branch parallel circuit has a total current flow of ? .

8A

Use the reciprocal method to find the equivalent resistance of the five branches in this circuit. With the given voltage and total resistance, use Ohm's Law to find the total current flow.

9A

A parallel circuit is also a ?.

Current divider circuit

Adding more resistive branches to a parallel circuit will increase total circuit resistance and decrease the total circuit current.

False

In the circuit, the R2 resistor branch will allow greater current flow than the R1 resistor branch.

False

Which equation should be used to find the total current of a parallel circuit when the source voltage and total resistance are known?

It = Et/Rt

If three equal-rated batteries were connected in parallel to a load, each battery would provide one-third of the total current to the load.

True

In a parallel circuit, the amount of current flow through each branch is inversely proportional to the resistance value.

True

The formula for finding total current in a parallel circuit when branch currents are known is IT = I1+I2+I3+... In.

True

In a parallel circuit, the ? across each branch of the circuit must be equal.

Voltage

Parallel circuits are circuits that have ?.

more than one path for current flow

In a parallel circuit, the ? in the circuit is equal to the sum of the branch currents.

total current flow