Quiz 7

A parallel circuit composed of a 220 ohm resistor and a 460 ohm resistor has a supply voltage of 277v. What is the current of the 220 ohm resistor?

1.26A

If three 15-volt batteries are connected(correctly) in parallel, what is their total output voltage?

15 volts

A three-branch parallel circuit has resistances of 2.5K ohms, 3.75K ohms, and 330 ohms connected to a 208v supply. What is the total power of the circuit?

160.24 W

A three-branch parallel circuit has a total of 385.83 ohms. Two of the resistors are 680 ohms and 1.5K ohms. What is the value of the third resistor?

2.20K ohms

A 270 ohm resistor, a 125 ohm resistor, and a 180 ohm are connected in parallel. the applied voltage is 240 v. What is the current total of the 270 ohm and the 125 ohm resistor?

2.81A

A two-branch parallel circuit has a 4A current in one branch and a 5A current in the other branch. The branch considered the larger load is the branch with____A

5A

A parallel circuit composed of 30 ohm resistor and a 10 ohm resistor has a supply voltage of 80v. What is the current of the 10 ohm resistor?

8A

The term "load" refers to the amount of________ and _____ in a branch circuit.

Current, power

For a fuse or circuit breaker to protect a parallel circuit, it should be placed where?

For a fuse or circuit breaker to protect a parallel circuit, it should be placed in series at the beginning before it splits into multiple circuit paths.

If bulb L₂ burns out, L₁, L₃, and L₄ will:

Not change

Circuits that have more than one path for the current to flow are_____ circuits

Parallel

In a parallel circuit, if one of the branches opened, which of the following would happen? Mark all answers

Pt decreases, Er remains constant

If this circuit is shorted as shown, which part of the circuit will the fuse protect?

R₁

Which branch or branches will be knocked out of the circuit by the problem shown in the schematic?

R₂, R₃, and R₄

In a parallel circuit, the total resistance is__________ value resistance

Smaller than the smallest

In a parallel circuit, the total current is equal to the______ of the individual branch circuits.

Sum

Of the formulas for finding total resistance of parallel resistors, only one formula will work for any number of resistors regardless of their value. The formula is:

The reciprocal method

In a parallel circuit, even if one of the current paths is opened, current will still flow in the circuit as long as one or more paths are provides a complete circuit.

True

A two-branch parallel circuit has resistors of 45 ohms and 25 ohms. What is the total resistance?

16.07 ohms

A 72.5K ohm resistor are connected in parallel. They have a supply of 480v. What is the power of the 55.6K ohm resistor?

4.14W

In a parallel circuit, the current through the branches is inversely proportional to the resistance of the branch. Because of this, parallel circuits are sometimes called:

Current dividers

If an open occurred as shown in this circuit, the total current would:

Decrease

In a parallel circuit, if the resistance(R) in each branch is held constant but the voltage(E) is changed from 240 volts to 120 volts, the current will:

Decrease

Batteries are connected in parallel to increase the amount of voltage to a circuit.

False

Load devices such as receptacles and luminares are wired in series

False

If the switch is opened, L₁, L₂, and L₃ will:

Go out

When connecting power supplies in parallel, what three important steps must be taken to ensure a proper(and safe) output to the load(s). Explain the importance of each for complete credit.

Same voltage rating Check the polarity Same type of source