Question 1

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 2

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

Accepted Answer

The term "load" in an electrical context refers to the amount of current that a device or circuit branch is drawing or requires to operate. It is essentially the electrical power demand of the device or circuit.

Question 3

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

Accepted Answer

An increase in current results in an increase of load, as load is directly proportional to the current flowing through a circuit.

Question 4

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 5

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 6

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...

Question 7

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 8

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, allowing electricity to flow through multiple paths simultaneously.

Question 9

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 10

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, as each branch provides an independent path for the current to flow.

Question 11

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 a water system provides an additional route for the water to flow, effectively reducing the overall resistance to flow in the system. This is because the water now has more pathways to travel through, which can decrease the pressure loss and improve circulation.

Question 12

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

Accepted Answer

The answer of The voltage drop across any branch of...

Question 13

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 14

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

In a parallel circuit, the voltage across each resistor is the same. Using Ohm's Law (I = V/R), the current through the 10 Ω resistor is 60 V / 10 Ω = 6 A.

Question 15

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

The answer of A three-branch parallel circuit has a total...

Question 16

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

Accepted Answer

Parallel circuits are known as current dividers because the total current in the circuit divides among the parallel branches according to their resistances.

Question 17

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 18

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

Accepted Answer

The amount of current flowing through a resistor is inversely proportional to its resistance, according to Ohm's Law (V = IR), where V is the voltage across the resistor, I is the current through the resistor, and R is the resistance.

Question 19

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

Accepted Answer

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

Quiz 7: Parallel Circuits

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

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

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

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

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

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 IX and RX for the branch values when total circuit current and the resistance are known, use t he _______________ formula.

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

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

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

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?

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

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

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 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?

Parallel circuits are also referred to as _____.

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?

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

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

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.