Deck 5: Series Circuits

Question 1

A series connection provides two or more paths for current to flow.

Answer 1

False

Question 2

Given the circuit in Figure , the voltage drop across R1 is 60 V. The drop across R2 is 45 V. What is the resistance value of R2?

A) 345 Ω
B) 225 Ω
C) 400 Ω
D) 450 Ω

Answer 2

225 Ω

Question 3

Given the circuit in Figure 5-11, the voltage drop across R1 is 75 V. What is the voltage drop across R2?

A) 75 V
B) 100 V
C) 25 V
D) 20 V

Answer 3

25 V

Question 4

Figure 5-9
The total current flowing in the circuit in Figure 5-9 is:

A) 1.06 A
B) 2.82 A
C) 0.53 A
D) 0.35 A

Question 5

In a series circuit, current is not the same when measured at different points in the circuit.

Question 6

A voltage divider is a series arrangement of resistors.

Question 7

Figure 5-7
Given the circuit in Figure 5-7, the voltage drop across R1 is 18 V. What is the voltage drop across R2?

A) 36 V
B) 20 V
C) 45 V
D) 54 V

Question 8

What is the current flowing in the circuit in Figure 5-6?

A) 0.5 mA
B) 0.05 mA
C) 25 mA
D) 2.5 mA

Question 9

A series circuit has the same voltage across every component.

Question 10

Given the circuit in Figure 5-4, what is the current through resistor R2?

A) 1 A
B) 0.2 A
C) 1.2 A
D) 100 mA

Question 11

The product of all the voltage drops in a series circuit will equal source voltage.

Question 12

Which of the circuits Figure 5-1, 5-2 or 5-3) is a circuit with resistors in series?

A) Figure 5-2
B) Figure 5-3
C) Figure 5-1

Question 13

The total resistance in the series circuit in Figure is:

A) 498 Ω
B) 590 Ω
C) 534 Ω
D) 578 Ω

Question 14

The total resistance in the circuit in Figure is:

A) 23,416.2 Ω
B) 2907 Ω
C) 709.2 kΩ
D) 927 Ω

Question 15

Ground is a common reference point in a circuit.

Question 16

The current entering a point in a circuit is equal to the current leaving the point.

Question 17

The total resistance of a series circuit is equal to the average of all the resistance values.

Question 18

Figure 5-10
Figure 5-10 shows 5 D-size batteries connected in a series circuit. What is the total voltage measured between points A and B?

A) 4.5 V
B) 3.0 V
C) 7.5 V
D) 1.5 V

Question 19

The total resistance in the circuit in Figure is:

A) 90 Ω + 10 Ω
B) 90 Ω
C) 90 Ω / 10 Ω
D) 10 Ω

Question 20

As you add resistors to a series circuit, total current will decrease.

Question 21

The voltage drop across a series resistor is proportional to what other value?

A) Total resistance
B) Its own resistance
C) Wattage rating
D) The amount of time the circuit is on

Question 22

Figure 5-14
Given the voltage divider circuit, in Figure 5-14, what is the circuit current?

A) 6.0 mA
B) 10.9 mA
C) 2.75 mA
D) 1.09 mA

Question 23

Figure 5-12
Given the circuit in Figure 5-12, the voltage drop across R2 is:

A) 22.2 V
B) 2.22 V
C) 3.33 V
D) 4.44 V

Question 24

Figure 5-12
Given the circuit in Figure 5-12, the circuit current is:

A) 0.022 A
B) 220 mA
C) 2.22 mA
D) 22.2 mA

Question 25

What is the effect on total current if the voltage supplying a circuit is halved, and the circuit resistance stays the same?

A) It doubles
B) It remains the same.
C) It goes to zero
D) It decreases by half.

Question 26

Figure 5-14
Given the voltage divider, in Figure 5-14, the output voltage Vout) is:

A) 0.91 V
B) 2.75 V
C) 6.0 V
D) 1.09 V

Question 27

Given the circuit in Figure , what is the resistance value of R2?

A) 25 Ω
B) 75 Ω
C) 20 Ω
D) 100 Ω

Question 28

In a series circuit, the voltage measured across an open will be:

A) source voltage
B) the normal voltage drop
C) zero
D) infinite voltage

Question 29

Given the special series circuit, called a voltage divider, in Figure 5-13, the output voltage Vout) is:

A) 10 V
B) 3.75 V
C) 5.0 V
D) 2.5 V

Question 30

A voltage divider is always a:

A) bridge circuit
B) series-parallel circuit
C) parallel circuit
D) series circuit

Question 31

Which measuring device requires no circuit power to obtain a reading?

A) Ammeter
B) Wattmeter
C) Voltmeter
D) Ohmmeter

Question 32

If the total voltage applied in a series circuit of three resistors is 120 V and the voltage drop across R1 is 20 V and R2 drops 30 V, what is the voltage drop for R3?

A) 120 V
B) 70 V
C) 40 V
D) 50 V

Question 33

The total resistance of a series circuit is equal to:

A) the average of all the resistance values
B) the largest resistance value
C) the sum of all the resistance values
D) the smallest resistance value

Question 34

Figure 5-12
Given the circuit in Figure 5-12, the voltage drop across R3 is:

A) 0.333 V
B) 2.22 V
C) 3.33 V
D) 4.44 V

Question 35

Given a series circuit containing resistors of different values, which statement is not true?

A) The total resistance is the sum of the value of the resistors.
B) The current through each resistor is the same.
C) The voltage drop across each resistor is the same.
D) The sum of the voltage drops across each resistive element will be equal to the voltage source.

Question 36

Kirchhoff's voltage law states that:

A) the algebraic sum of the potential rises and drops around a closed loop is zero
B) the algebraic sum of the individual currents around a closed loop is zero
C) the algebraic sum of the resistances is equal to the sum of the voltages
D) the voltages developed across each element in a series circuit are identical

Question 37

Given the voltage divider circuit,. Suppose resistors R1 and R2 are changed to 10 Ω. What is the new output voltage Vout)?

A) 2.25 V
B) 1.0 V
C) 5.0 V
D) 3.75 V

Question 38

A series circuit has:

A) more than two current paths
B) only one current path
C) different currents at different points
D) two current paths

Question 39

Figure 5-12
Given the circuit in Figure 5-12, the voltage drop across R1 is:

A) 33.3 V
B) 2.22 V
C) 3.33 V
D) 1.22 V

Question 40

What is the supply voltage when a 5 kΩ and a 4 kΩ resistor are in series and 6 V is measured across the smaller resistor?

A) 13.5 V
B) 16 V
C) 6 V
D) 12 V

Question 41

What is the total current of a series circuit with a 9 V battery, a 4.7 kΩ, a 6.1 kΩ resistor, and a 450 Ω resistor?

A) 20 mA
B) 23.4 mA
C) 1.9 mA
D) 800 µA

Question 42

The voltage drop across a series resistor is proportional to what other value?

A) The wattage rating
B) The direction of current flow
C) Its own resistance
D) The amount of time the circuit is on

Question 43

If the voltage of a lamp is to be measured by a voltmeter, then:

A) connect the voltmeter in the same current path as the lamp
B) remove the lamp and put the voltmeter in the same current path as the lamp was in
C) open the circuit and connect the leads across the lamp
D) connect the leads across the lamp without opening the circuit

Question 44

Which of the following is a true statement concerning potentiometers?

A) Potentiometers can only be classified as linear
B) Potentiometers do not have a schematic symbol.
C) Potentiometers can be used as voltage dividers
D) Potentiometers have only two terminals.