Series-Parallel Circuits

Q1: If a Wheatstone bridge is balanced, a voltmeter in the center of the bridge will read:

A the same as the source voltage

B half the source voltage

C zero volts

D twice the source voltage

Q2: The current flowing through an unloaded voltage divider is called the:

A resistor current

B load current

C bleeder current

D voltage current

Q3: What is the power dissipated by R2, R4, and R6?

A
P2 = 417 mW, P4 = 193 mW, P6 = 166 mW

B
P2 = 407 mW, P4 = 183 mW, P6 = 156 mW

C
P2 = 397 mW, P4 = 173 mW, P6 = 146 mW

D
P2 = 387 mW, P4 = 163 mW, P6 = 136 mW

Q4: A Wheatstone bridge can be used to determine an unknown

A current

B resistance

C power

D voltage

Q5: Components or combinations of components with common currents, in a series–parallel circuit, are in:

A parallel with each other

B series with each other

C either series or parallel with each other

D none of the above

Q6: What is the total resistance of a circuit when R1 (7 k omega.gif) is in series with a parallel combination of R2 (20 k omega.gif), R3 (36 k omega.gif), and R4 (45 k omega.gif)?

A
4 k omega.gif

B
17 k omega.gif

C
41 k omega.gif

D
108 k omega.gif

Q7: When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read:

A twice the source voltage

B the same as the source voltage

C zero volts

D half the source voltage

Q8: What is the total resistance?

A
2.2 k

B
3.2 k

C
4.2 k

D
5.2 k

Q9: What determines if resistor connections are in series, parallel, or series–parallel?

A the voltage source

B the power source

C resistance

D current flow

Q10: What theorem replaces a complex network with an equivalent circuit containing a source voltage and a series resistance?

A Multinetwork

B Norton

C Thevenin

D Superposition

Q11: If the load in the given circuit is 120 komega.gif , what is the loaded output voltage?

A
4.21 V

B
15.79 V

C
16 V

D
19.67 V

Q12: In a series–parallel circuit consisting of R1 and R2 in series and connected in parallel with R3, if R1 opens, then R2's voltage will:

A increase

B decrease

C remain the same

D cannot tell

Q13: In a series–parallel circuit, individual component power dissipations are calculated using:

A individual component parameters

B a percent of the voltage division ratio squared

C total current squared multiplied by the resistor values

D a percent of the total power depending on resistor ratios

Q14: Which circuit fault do the meter readings in the given figure indicate?

A
The 1 komega.gif resistor is open.

B
The 4.7 komega.gif resistor is open.

C
The 2.2 komega.gif resistor is open.

D
The 3.3 komega.gif resistor is open.

Q15: If the load in the given circuit is 80 komega.gif , what is the bleeder current?

A
196 mu.gif A

B
1.96 mA

C
2 mA

D
2.16 mA

Q16: How much current is flowing through R1 in the given circuit?

A
0.3 A

B
0.15 A

C
0.5 A

D
0.68 A

Q17: In the given circuit, what is RUNK equal to if RV must be adjusted to 1,232 omega.gif in order to balance the bridge?

A
220 omega.gif

B
6,899 omega.gif

C
1,232 omega.gif

D
More information is needed in order to find RUNK.

Q18: Which circuit fault do the meter readings in the given figure indicate?

A
The 1 komega.gif resistor is shorted.

B
The 4.7 komega.gif resistor is shorted.

C
The 2.2 komega.gif resistor is shorted.

D
The 3.3 komega.gif resistor is shorted.

Q19: The first goal to accomplish in analyzing a complex series-parallel circuit is to

A equate all parallel components

B equate all series components

C solve for all the voltage drops

D solve for the total current and resistance

Q20: With 6 V applied, what is the voltage across R2 of a parallel combination of R2 (1 k omega.gif), R3 (2 k omega.gif), and R4 (1 k omega.gif) in series with R1, whose value is 2 k omega.gif?

A
1 V

B
3 V

C
5 V

D
6 V

Q21: With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3?

A
200 mA

B
800 mA

C
600 mA

D
400 mA

Q22: If the load in the given circuit is 12 komega.gif , what is the loaded output voltage?

A
5.88 V

B
14.12 V

C
16 V

D
17.14 V

Q23: What is the total resistance of the given circuit?

A
92 omega.gif

B
288 omega.gif

C
17.7 omega.gif

D
128 omega.gif

Q24: If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?

A 10 ohms

B 20 ohms

C 45 ohms

D 90 ohms

Q25: What is the power dissipated by R1, R2, and R3?

A
P1 = 0.13 W, P2 = 0.26 W, P3 = 0.12 W

B
P1 = 0.26 W, P2 = 0.52 W, P3 = 0.23 W

C
P1 = 0.52 W, P2 = 0.92 W, P3 = 0.46 W

D
P1 = 1.04 W, P2 = 1.84 W, P3 = 0.92 W

Q26: If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?

A 10 ohms

B 20 ohms

C 45 ohms

D 90 ohms

Q27: If R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, the voltage across R3 will

A increase

B decrease

C remain the same

D Cannot tell

Q28: How much voltage is dropped across R3 in the given circuit?

A
46 V

B
34 V

C
23 V

D
12 V

Q29: What is the voltage to the load?

A
11.4 V

B
12.4 V

C
13.4 V

D
15.4 V

Q30: What is the total resistance?

A
800

B
1.2 k

C
1.6 k

D
1.8 k

Q31: What are the branch currents I2 and I3?

A
I2 = 4 mA, I3 = 2 mA

B
I2 = 4.5 mA, I3 = 2.5 mA

C
I2 = 2.5 mA, I3 = 1.5 mA

D
I2 = 5.5 mA, I3 = 3.5 mA

Q32: If R1 is in series with parallel connected to R2 and R3, what happens to total current if R2 opens?

A increases

B decreases

C remains the same

D cannot tell

Q33: If the load in the given circuit is open, what is the unloaded output voltage?

A
0 V

B
4 V

C
16 V

D
20 V

Q34: The first goal(s) to accomplish in analyzing a complex series–parallel circuit is to:

A equate all parallel components

B equate all series components

C solve for all the voltage drops

D solve for the total current and resistance

Q35: When placed into a circuit, how are electronic components usually connected?

A positive terminal to positive terminal

B in parallel

C as a combination of series and parallel

D in series

Q36: When a load is connected to a voltage divider, the total resistance of the circuit will:

A decrease

B double

C increase

D remain the same


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