Series Circuits

Q1: Power is defined as:

A the rate at which work is done

B work

C the conversion of energy

D joules

Q2: Calculate the voltage at point B in the given circuit.

A +10.48 V

B +0.94 V

C +2.6 V

D +3 V

Q3: If a voltage is connected between contacts 2 and 3 in the given circuit, which resistors will carry current?

A All twelve resistors will carry current.

B
Only R6 and R11 will carry current.

C
Only R2, R4, R6, and R11 will carry current.

D
Only R3, R6, R9, and R12 will carry current.

Q4: An 8-ohm resistor is in series with a lamp. The circuit current is 1 A. With 20 V applied, what voltage is being allowed for the lamp?

A 4 V

B 8 V

C 12 V

D 20 V

Q5: What are the minimum and maximum output voltages?

A 0 V, 4 V

B 0 V, 8 V

C 0 V, 12 V

D 0 V, 16 V

Q6: If the resistance total in a series circuit doubles, current will:

A be the same

B be doubled

C reduce source voltage

D be halved

Q7: How will an open resistor affect a series circuit?

A Current will flow around the open resistor.

B The open resistor will drop 0 V.

C Total resistance will decrease.

D No current will flow in the circuit.

Q8: In a series circuit, the voltage measured across a short will be:

A source voltage

B infinite voltage

C zero volts

D the normal voltage drop

Q9: Calculate the voltage at point C in the given circuit.

A +1.48 V

B +0.94 V

C +11.6 V

D +3 V

Q10: One of the most common applications of a potentiometer is as an adjustable voltage divider, also known as

A voltage control

B current control

C volume control

D divider control

Q11: What is the dc source voltage?

A 78 V

B 39 V

C 13 V

D 0 V

Q12: What is wrong, if anything, with this circuit?

A R1 is open.

B R1 is shorted.

C R2 is open.

D R2 is shorted.

Q13: What is the total power in the circuit?

A 170 mW

B 1.7 W

C 17 W

D 170 W

Q14: A series circuit current:

A remains the same through each component

B is the same as the individual resistances

C is subtracted by each component

D varies through each component

Q15: With a total resistance of 3300 ohms and a 45 V source, if R3 is 1200 ohms, what will be its voltage drop?

A 16.36 V

B 32.72 V

C 10.90 V

D 15.00 V

Q16: A series circuit schematic is recognized because all the components are connected:

A diagonally across the page

B in a uniform vertical manner

C end to end in a "string"

D horizontally across the page

Q17: Resistance in a series circuit will:

A control the voltage

B double the current

C halve the power

D oppose current

Q18: If series current doubles, then:

A resistance is halved

B voltage is doubled

C voltage is reduced

D resistance is doubled

Q19: Which equation determines individual resistor voltage drop?

A V x R

B I2 x R

C V x I

D I x R

Q20: What determines the total resistance in a series circuit?

A the largest resistor

B the sum of the resistors

C the largest resistor minus the smaller

D the smallest resistor

Q21: How much current flows in the circuit in the given circuit?

A
20 mu.gifA

B
60 mu.gifA

C
80 mu.gifA

D
140 mu.gifA

Q22: If 5 V and 16 V power supplies are connected in series-opposing, what is the total voltage?

A 11 V

B 16 V

C 21 V

D 80 V

Q23: In the given circuit, what type of failure will cause the voltage at point B to equal the voltage at point C?

A
R1 shorts

B
R1 shorts

C
R3 shorts

D
R2 opens

Q24: A string of resistors in a series circuit will:

A divide the source voltage in proportion to their values

B reduce the power to zero

C cause the current to divide

D increase the source voltage in proportion to the values

Q25: With a 900 V source, voltage is divided across 3 series resistors of 300 V, 280 V, and:

A 30 V

B 270 V

C 320 V

D 900 V

Q26: Given a series circuit containing resistors of different values, which statement is not true?

A The current through each resistor is the same.

B The sum of the voltage drops across each resistive element will be equal to source voltage.

C The total resistance is the sum of the value of the resistors.

D The voltage drop across each resistor is the same.

Q27: What is the voltage at points B to D in the given circuit?

A +19.2 V

B +8.8 V

C +28 V

D –19.2 V

Q28: Kirchhoff’s voltage law states that:

A the sum of the voltage drops in a series circuit is equal to the total applied voltage

B the algebraic sum of the resistances is equal to the sum of the voltages

C the algebraic sum of the individual currents around a closed loop is zero

D the voltages developed across each element in a series circuit are identical

Q29: With 20 V applied, an 8-ohm resistor is in series with a lamp. When the lamp is removed, what voltage will be read across the lamp socket?

A 0 V

B 8 V

C 12 V

D 20 V

Q30: What is the total resistance?

A
0 k; there is no current

B
2 k; the average

C
3 k; the largest

D
6 k; the sum

Q31: Which is a true statement about the circuit in the given circuit?

A
The batteries are series-aiding and the total source voltage equals 21 V.

B
The batteries are series-opposing and the total source voltage equals 3 V.

C
The batteries are series-aiding and the total source voltage equals 3 V.

D    <div class="bix-td-option" id="tdOptionNo_D_130"><span id="lnkOptionLink_D_130" class="mdi mdi-alpha-d-circle-outline"></span></div>
                                                    <div class="bix-td-option-val d-flex flex-row align-items-center" id="tdOptionDt_D_130">
                                                        <div class="flex-wrap">The batteries are <b><i>series-opposing</i></b> and the total source voltage equals 21 V.</div>
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Q32: What is the current flow through R1, R2, and R3?

A 1A, 1A, 1A

B 1A, 2A, 3A

C 3A, 3A, 3A

D 3A, 2A, 1A

Q33: If three resistors of 1.5 kilohms, 470 ohms, and 3300 ohms are in series with a 25-volt source, what is the total circuit current?

A 210 mA

B 5.2 mA

C 4.7 mA

D .007 A

Q34: What is the total power in the circuit?

A 170 mW

B 1.7 W

C 17 W

D 170 W

Q35: A short circuit has:

A too much resistance

B no conductance

C no resistance

D low current

Q36: When a battery is connected to a series circuit, it delivers current based only upon:

A primary/secondary difference

B total resistance

C the polarity connections

D average resistance

Q37: If series resistors dissipate 16 mW, 107 mW, 146 mW, and 243 mW, what is the total power consumed by the circuit?

A 128 mW

B 269 mW

C 512 mW

D 1024 mW

Q38: If two resistors have the same voltage drop in a series circuit, it means:

A they are connected in parallel

B they are of unequal value

C the voltage has doubled

D they are of equal value

Q39: If R2 opens in the given circuit, what is the voltage at point B?

A div class="bix-td-option" id="tdOptionNo_A_125">
+19.2 V

B
+8.8 V

C
+28 V

D
–19.2 V

Q40: When 50 V is applied to four series resistors, 100 µA flows. If R1 = 12 komega.gif , R2 = 47 komega.gif, and R3 = 57 komega.gif, what is the value of R4?

A
38.4 komega.gif

B
3.84 komega.gif

C
384 komega.gif

D
3.84 Momega.gif

Q41:
While putting three 1.5 V batteries into a flashlight, you put one in backwards. The flashlight will be ______________.

A brighter than normal

B dimmer than normal

C off

D the same

Q42: 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


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