DEL Unit 07: Parallel Circuits

Which of the following represents the reciprocal formula?

1/Rt = 1/R1 + 1/R2 + 1/R3 + 1/Rn

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

False

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

10 Ω

A three-branch parallel circuit has a total resistance of 385.83 Ω. Two of the resistors are 680 Ω and 1500 Ω. What is the value of the third resistor?

2200 Ω

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

30 Ω

A parallel circuit is composed of a 10 Ω and a 22 Ω resistor. It has a voltage of 60 V. What is the current in the 10 Ω resistor?

6A

A three-branch parallel circuit has resistors of 27 Ω, 56 Ω, and 15 Ω. What is the total resistance?

8.23 Ω

The product- over- sum formula can be used only when all the resistors in the circuit are of equal value.

False

Which formula can be used to calculate the current flow in a parallel circuit?

I1 = Et / R1

Which of the following represents the formula for product over sum?

Rt= (R1 xR2) /(R1+R2)

Which of the following is the formula for resistors of equal value?

Rt=R/N

The sum of the currents in a parallel circuit must _____________ the total current.

be equal to

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

current

Parallel circuits are also called _____.

current dividers

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

less than the lowest

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

product over sum, reciprocal formula, or resistors of equal value

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

sum

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

parallel