Question 1

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?
A) 2180 Ω
B) 2200 Ω
C) 467.89 Ω
D) 246.16 Ω

Accepted Answer

B

Question 2

In a parallel circuit, the total current flow is equal to the _____ of the currents through all the branches.
A) difference
B) average
C) sum
D) quotient

Accepted Answer

In a parallel circuit, the total current flow is equal to the sum of the currents through all the branches because each branch provides a separate path for the flow of current. The total current is divided among the parallel branches depending on their resistance and voltage. Therefore, the sum of the currents through all the branches is equal to the total current flow.

Question 3

The voltage drop across any branch of a parallel circuit is the same as _______________ voltage.

Accepted Answer

applied

Question 4

The term "load" refers to the amount of _____ in a circuit branch.
A) current
B) resistance
C) voltage
D) wattage

Accepted Answer

The amount of load in a circuit branch refers to the amount of current flowing through that branch. This can be measured in amperes (A) and is dependent on the resistance and voltage in the circuit.

Question 5

Circuits that have more than one path for current flow are _____ circuits.
A) parallel
B) series
C) combination

Accepted Answer

Parallel circuits have more than one path for current flow as compared to series circuits where the current has only one path to flow through. Combination circuits are a mix of parallel and series circuits.

Question 6

A parallel circuit composed of a 150 Ω and a 270 Ω resistor has a voltage of 120 V. What is the current in the 150 Ω resistor?
A) 0.29 A
B) 0.8 A
C) 1 A
D) 0.44 A

Accepted Answer

The answer of A parallel circuit composed of a 150...

Question 7

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?
A) It increases
B) It lessens
C) It stays the same

Accepted Answer

Adding a return path to the system allows for more efficient flow and reduces resistance to flow. This is because the return path provides an alternate route for the water to flow, reducing the amount of pressure and friction within the system. As a result, the overall resistance to flow is lessened.

Question 8

In a parallel circuit, the voltage across each branch must be _______________.

Accepted Answer

The answer of In a parallel circuit, the voltage across...

Question 9

Parallel circuits are also referred to as _____.
A) current dividers
B) current multipliers
C) voltage dividers
D) voltage multipliers

Accepted Answer

Parallel circuits are also referred to as current dividers because the current flowing through the circuit is divided into separate paths.

Question 10

A parallel circuit 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?
A) 6 A
B) 5 A
C) 2.73 A
D) 1.88 A

Accepted Answer

The answer of A parallel circuit composed of a 10...

Question 11

A parallel circuit is composed of two 60 Ω resistors. What is the total resistance?
A) 1 Ω
B) 3600 Ω
C) 120 Ω
D) 30 Ω

Accepted Answer

In a parallel circuit, the total resistance (R_total) can be calculated using the formula 1/R_total = 1/R1 + 1/R2 for two resistors. Here, 1/R_total = 1/60 + 1/60 = 2/60 = 1/30, so R_total = 30 Ω.

Question 12

Most devices such as light receptacles in homes and office buildings are connected in _______________ circuits.

Accepted Answer

The answer of Most devices such as light receptacles in...

Question 13

An increase in _____, not resistance, results in an increase of load.
A) power
B) current
C) voltage
D) wattage

Accepted Answer

The answer of An increase in _____, not resistance, results...

Question 14

In a parallel circuit, the total resistance is _____ value resistor.
A) larger than the lowest
B) less than the lowest
C) equal to the largest
D) equal to the lowest

Accepted Answer

In a parallel circuit, the total resistance is always less than the resistance of the lowest value resistor because the current has multiple paths to take, effectively reducing the overall resistance of the circuit.

Question 15

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

Accepted Answer

According to Ohm's Law, the amount of current flowing through a resistor is directly proportional to the voltage applied across it, not its resistance.

Question 16

A two-branch parallel circuit has a 30 Ω and a 15 Ω resistor. What is the total resistance?
A) 2 Ω
B) 10 Ω
C) 45 Ω
D) 15 Ω

Accepted Answer

The total resistance $R_{total}$ in a parallel circuit is given by $\frac{1}{R_{total}} = \frac{1}{R_1} + \frac{1}{R_2}$. For a 30 Ω and a 15 Ω resistor in parallel, $\frac{1}{R_{total}} = \frac{1}{30} + \frac{1}{15} = \frac{1}{30} + \frac{2}{30} = \frac{3}{30}$, so $R_{total} = \frac{30}{3} = 10 \Omega$.

Question 17

A method for finding total resistance of parallel resistors is _____.
A) product over sum
B) reciprocal formula
C) resistors of equal value
D) all of the above

Accepted Answer

All the options provided are methods for finding the total resistance of parallel resistors. The product over sum method is typically used for two resistors, the reciprocal formula (1/R_total = 1/R1 + 1/R2 + ...) is a general approach for any number of parallel resistors, and the method for resistors of equal value simplifies calculation by dividing the value of one resistor by the number of resistors.

Question 18

To calculate current flow through any branch of a circuit by substituting the values of I_X and R_X for the branch values when total circuit current and the resistance are known, use t he _______________ formula.

Accepted Answer

The answer of To calculate current flow through any branch...

Question 19

A three branch parallel circuit has resistors of 27 Ω , 56 Ω , and 15 Ω . What is the total resistance?
A) 9.64 Ω
B) 98 Ω
C) 18.22 Ω
D) 8.23 Ω

Accepted Answer

The answer of A three branch parallel circuit has resistors...

Quiz 7: Parallel Circuits

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?

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

The voltage drop across any branch of a parallel circuit is the same as _______________ voltage.

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

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

A parallel circuit composed of a 150 Ω and a 270 Ω resistor has a voltage of 120 V. What is the current in the 150 Ω resistor?

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?

In a parallel circuit, the voltage across each branch must be _______________.

Parallel circuits are also referred to as _____.

A parallel circuit 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?

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

Most devices such as light receptacles in homes and office buildings are connected in _______________ circuits.

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

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

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

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

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

To calculate current flow through any branch of a circuit by substituting the values of IX and RX for the branch values when total circuit current and the resistance are known, use t he _______________ formula.

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

To calculate current flow through any branch of a circuit by substituting the values of I_X and R_X for the branch values when total circuit current and the resistance are known, use t he _______________ formula.