Question 1

If one resistor opens in a parallel circuit, the total circuit resistance ________ and the total circuit current ________.

Accepted Answer

A) decreases, increases 
B) decreases, decreases 
C) increases, increases 
D) increases, decreases 
A) decreases, increases 
B) decreases, decreases 
C) increases, increases 
D) increases, decreases

Question 2

RT=   and  R1=470$\Omega$  in a two-branch parallel circuit. What is the value of  R2?

Accepted Answer

A)   1108$\Omega$ 
B)   110$\Omega$ 
C)  194$\Omega$ 
D)   770 $\Omega$ 
A)   1108$\Omega$ 
B)   110$\Omega$ 
C)  194$\Omega$ 
D)   770 $\Omega$

Question 3

If a  $k \Omega$ resistor, a  3.3  $k \Omega$ resistor and a  5.43  $k \Omega$ resistor are connected in parallel across a  50V  source, what is the current through the  5.43$k \Omega$ resistor?

Accepted Answer

A)   4.72 mA 
B)   15.15 mA 
C)   9.21 mA 
D)   10.64 mA 
A)   4.72 mA 
B)   15.15 mA 
C)   9.21 mA 
D)   10.64 mA

Question 4

If there is  100 mA  of current flowing into a three-branch parallel circuit and two of the branch currents are  40 mA  and  20 mA , the third branch current is________

Accepted Answer

A)   20 mA 
B)   40 mA 
C)   60 mA 
D)   160 mA 
A)   20 mA 
B)   40 mA 
C)   60 mA 
D)   160 mA

Question 5

In a three-branch parallel circuit,  R1=1.2 $\mathrm { M } \Omega$, R2=1$\mathrm { M } \Omega$ and  RT=0.5 $\mathrm { M } \Omega$ . Calculate  R3 .

Accepted Answer

A)  6 $\mathrm { M } \Omega$ 
B)  2 $\mathrm { M } \Omega$ 
C)   7.7  $\mathrm { M } \Omega$ 
D)   1.7  $\mathrm { M } \Omega$ 
A)  6 $\mathrm { M } \Omega$ 
B)  2 $\mathrm { M } \Omega$ 
C)   7.7  $\mathrm { M } \Omega$ 
D)   1.7  $\mathrm { M } \Omega$

Question 6

If a  330$\Omega$  resistor,  270$\Omega$ resistor and  68$\Omega$  resistor are connected in parallel, what is the approximate value for RT?

Accepted Answer

A)   668$\Omega$ 
B)   68$\Omega$ 
C)   22$\Omega$ 
D)   47$\Omega$ 
A)   668$\Omega$ 
B)   68$\Omega$ 
C)   22$\Omega$ 
D)   47$\Omega$

Question 7

A parallel circuit can be easily identified because only one end of each component is connected to each other.

Accepted Answer

A) True 
 B)False

Question 8

The most popular application for a parallel circuit in electronics is as a:

Accepted Answer

A) voltage divider. 
B) resistance divider. 
C) current divider. 
D) power divider. 
A) voltage divider. 
B) resistance divider. 
C) current divider. 
D) power divider.

Question 9

If four 100W lamps are connected in parallel across a 120 V source,W hat is the total current?

Accepted Answer

A) 33.3 A 
B) 833 mA 
C) 8.33 A 
D) 3.33 A 
A) 33.3 A 
B) 833 mA 
C) 8.33 A 
D) 3.33 A

Question 10

If  5 A and  3A enter a junction from two separate paths, how much current flows out of the junction?

Accepted Answer

A)   3 A 
B)   8 A 
C)   2 A 
D)  the larger of the two 
A)   3 A 
B)   8 A 
C)   2 A 
D)  the larger of the two

Question 11

If twelve 1.5 $\mathrm { M } \Omega$ resistors are connected in parallel across 50 V, RT equals______

Accepted Answer

A)   0.125  $\mathrm { M } \Omega$ 
B)   1 $\mathrm { M } \Omega$ 
C)   1.25 $\mathrm { M } \Omega$ 
D)   1.5 $\mathrm { M } \Omega$ 
A)   0.125  $\mathrm { M } \Omega$ 
B)   1 $\mathrm { M } \Omega$ 
C)   1.25 $\mathrm { M } \Omega$ 
D)   1.5 $\mathrm { M } \Omega$

Question 12

If three  75 W  lamps are connected in parallel across a  125 V  source, IT equals_______

Accepted Answer

A)   1.8 A 
B)   180 mA 
C)   18 A 
D)   18 mA 
A)   1.8 A 
B)   180 mA 
C)   18 A 
D)   18 mA

Question 13

If the  RT=6.8$\mathrm { k } \Omega$  and  R1=10  $\mathrm { k } \Omega$ in a two-branch parallel circuit, what is the value of  R2  ?

Accepted Answer

A)   16.8  $k \Omega$ 
B)   3.2  $\mathrm { k } \Omega$ 
C)   12 $\mathrm { k } \Omega$ 
D)   21.3  $k \Omega$ 
A)   16.8  $k \Omega$ 
B)   3.2  $\mathrm { k } \Omega$ 
C)   12 $\mathrm { k } \Omega$ 
D)   21.3  $k \Omega$

Question 14

If  IR1=75 mA and IR2=12.7 mA in a two branch parallel circuit, IT=85.7 mA .

Accepted Answer

A) True 
 B)False

Question 15

If a  470$\Omega$  resistor,680$\Omega$  resistor and 830$\Omega$  resistor are connected in parallel, the total resistance equals_______

Accepted Answer

A)   1980$\Omega$ 
B)  1150 $\Omega$ 
C)   208$\Omega$ 
D)  1510 $\Omega$ 
A)   1980$\Omega$ 
B)  1150 $\Omega$ 
C)   208$\Omega$ 
D)  1510 $\Omega$

Question 16

If a  5.5  $\mathrm { k } \Omega$, 22 $\mathrm { k } \Omega$ and  500$\Omega$resistor are connected in parallel, what is  RT  ?

Accepted Answer

A)   28.1  $\mathrm { k } \Omega$ 
B)   449$\Omega$ 
C)   330$\Omega$ 
D)   27.6 $\mathrm { k } \Omega$ 
A)   28.1  $\mathrm { k } \Omega$ 
B)   449$\Omega$ 
C)   330$\Omega$ 
D)   27.6 $\mathrm { k } \Omega$

Question 17

To measure the current through one branch of a parallel circuit, the meter is connected________

Accepted Answer

A)  in series with the source 
B)  in parallel with the branch resistor 
C)  in series with the branch resistor 
D)  across the source 
A)  in series with the source 
B)  in parallel with the branch resistor 
C)  in series with the branch resistor 
D)  across the source

Question 18

If three  4.7  $\mathrm { k } \Omega$ resistors are connected in parallel across a  12 V source, what is the value of  PT  ?

Accepted Answer

A)   141 mW 
B)   14.1 mW 
C)   91.9 mW 
D)   1.41 W 
A)   141 mW 
B)   14.1 mW 
C)   91.9 mW 
D)   1.41 W

Question 19

A  5.2  $\mathrm { M } \Omega$ resistor,  1.2  $\mathrm { M } \Omega$ resistor and 1 $\mathrm { M } \Omega$ resistor are connected in parallel across a  15 V source. What is the total current if the  1.2  $\mathrm { M } \Omega$
 resistor opens?

Accepted Answer

A)   2.88  $\mu \mathrm { A }$ 
B)   12.5  $\mu A$ 
C)   2.41 $\mu \mathrm { A }$ 
D)   17.9  $\mu A$ 
A)   2.88  $\mu \mathrm { A }$ 
B)   12.5  $\mu A$ 
C)   2.41 $\mu \mathrm { A }$ 
D)   17.9  $\mu A$

Question 20

A three-branch parallel circuit carries a total current of  1.2 mA . If  I1=0.2 mA and  I2=0.7 mA , then what is the value of  I3  ?

Accepted Answer

A)   2.4 mA 
B)   8.7 mA 
C)   7.2 mA 
D)   0.3 mA 
A)   2.4 mA 
B)   8.7 mA 
C)   7.2 mA 
D)   0.3 mA

If one resistor opens in a parallel circuit, the total circuit resistance and the total circuit current .

R_T=330 $R<sub>T</sub>=330 and R<sub>1</sub>=470 \Omega in a two-branch parallel circuit. What is the value of R<sub>2</sub>?$ and R₁=470 $\Omega$ in a two-branch parallel circuit. What is the value of R₂?

If a $k \Omega$ resistor, a 3.3 $k \Omega$ resistor and a 5.43 $k \Omega$ resistor are connected in parallel across a 50V source, what is the current through the 5.43 $k \Omega$ resistor?

If there is 100 mA of current flowing into a three-branch parallel circuit and two of the branch currents are 40 mA and 20 mA , the third branch current is________

In a three-branch parallel circuit, R₁=1.2 $\mathrm { M } \Omega$ , R₂=1 $\mathrm { M } \Omega$ and R_T=0.5 $\mathrm { M } \Omega$ . Calculate R₃ .

If a 330 $\Omega$ resistor, 270 $\Omega$ resistor and 68 $\Omega$ resistor are connected in parallel, what is the approximate value for R_T?

A parallel circuit can be easily identified because only one end of each component is connected to each other.

The most popular application for a parallel circuit in electronics is as a:

If four 100W lamps are connected in parallel across a 120 V source,W hat is the total current?

If 5 A and 3A enter a junction from two separate paths, how much current flows out of the junction?

If twelve 1.5 $\mathrm { M } \Omega$ resistors are connected in parallel across 50 V, R_T equals______

If three 75 W lamps are connected in parallel across a 125 V source, I_T equals_______

If the R_T=6.8 $\mathrm { k } \Omega$ and R₁=10 $\mathrm { k } \Omega$ in a two-branch parallel circuit, what is the value of R₂ ?

If I_R1=75 mA and I_R2=12.7 mA in a two branch parallel circuit, I_T=85.7 mA .

If a 470 $\Omega$ resistor,680 $\Omega$ resistor and 830 $\Omega$ resistor are connected in parallel, the total resistance equals_______

If a 5.5 $\mathrm { k } \Omega$ , 22 $\mathrm { k } \Omega$ and 500 $\Omega$ resistor are connected in parallel, what is RT ?

To measure the current through one branch of a parallel circuit, the meter is connected________

If three 4.7 $\mathrm { k } \Omega$ resistors are connected in parallel across a 12 V source, what is the value of P_T ?

A 5.2 $\mathrm { M } \Omega$ resistor, 1.2 $\mathrm { M } \Omega$ resistor and 1 $\mathrm { M } \Omega$ resistor are connected in parallel across a 15 V source. What is the total current if the 1.2 $\mathrm { M } \Omega$ resistor opens?

A three-branch parallel circuit carries a total current of 1.2 mA . If I₁=0.2 mA and I₂=0.7 mA , then what is the value of I₃ ?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Regulators, Filters, and Op-Amps

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

Exam 5: Parallel Circuits

If one resistor opens in a parallel circuit, the total circuit resistance ________ and the total circuit current ________.

RT=330 and R1=470 Ω\OmegaΩ in a two-branch parallel circuit. What is the value of R2?

If a kΩk \OmegakΩ resistor, a 3.3 kΩk \OmegakΩ resistor and a 5.43 kΩk \OmegakΩ resistor are connected in parallel across a 50V source, what is the current through the 5.43 kΩk \OmegakΩ resistor?

If there is 100 mA of current flowing into a three-branch parallel circuit and two of the branch currents are 40 mA and 20 mA , the third branch current is________

In a three-branch parallel circuit, R1=1.2 MΩ\mathrm { M } \OmegaMΩ , R2=1 MΩ\mathrm { M } \OmegaMΩ and RT=0.5 MΩ\mathrm { M } \OmegaMΩ . Calculate R3 .

If a 330 Ω\OmegaΩ resistor, 270 Ω\OmegaΩ resistor and 68 Ω\OmegaΩ resistor are connected in parallel, what is the approximate value for RT?

A parallel circuit can be easily identified because only one end of each component is connected to each other.

The most popular application for a parallel circuit in electronics is as a:

If four 100W lamps are connected in parallel across a 120 V source,W hat is the total current?

If 5 A and 3A enter a junction from two separate paths, how much current flows out of the junction?

If twelve 1.5 MΩ\mathrm { M } \OmegaMΩ resistors are connected in parallel across 50 V, RT equals______

If three 75 W lamps are connected in parallel across a 125 V source, IT equals_______

If the RT=6.8 kΩ\mathrm { k } \OmegakΩ and R1=10 kΩ\mathrm { k } \OmegakΩ in a two-branch parallel circuit, what is the value of R2 ?

If IR1=75 mA and IR2=12.7 mA in a two branch parallel circuit, IT=85.7 mA .

If a 470 Ω\OmegaΩ resistor,680 Ω\OmegaΩ resistor and 830 Ω\OmegaΩ resistor are connected in parallel, the total resistance equals_______

If a 5.5 kΩ\mathrm { k } \OmegakΩ , 22 kΩ\mathrm { k } \OmegakΩ and 500 Ω\OmegaΩ resistor are connected in parallel, what is RT ?

To measure the current through one branch of a parallel circuit, the meter is connected________

If three 4.7 kΩ\mathrm { k } \OmegakΩ resistors are connected in parallel across a 12 V source, what is the value of PT ?

A 5.2 MΩ\mathrm { M } \OmegaMΩ resistor, 1.2 MΩ\mathrm { M } \OmegaMΩ resistor and 1 MΩ\mathrm { M } \OmegaMΩ resistor are connected in parallel across a 15 V source. What is the total current if the 1.2 MΩ\mathrm { M } \OmegaMΩ resistor opens?

A three-branch parallel circuit carries a total current of 1.2 mA . If I1=0.2 mA and I2=0.7 mA , then what is the value of I3 ?

Quantities and Units

Voltage, Current, and Resistance

Ohms Law, Energy, and Power

Series Circuits

Series-Parallel Circuits

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Rc Circuits

Inductors

Rl Circuits

Rlc Circuits and Resonance

Time Response of Reactive Circuits

Transformers

Regulators, Filters, and Op-Amps

Understanding Transducers, Sensors, and Conversion in Industrial Processes

Filters

If one resistor opens in a parallel circuit, the total circuit resistance and the total circuit current .

R_T=330 $R<sub>T</sub>=330 and R<sub>1</sub>=470 \Omega in a two-branch parallel circuit. What is the value of R<sub>2</sub>?$ and R₁=470 $\Omega$ in a two-branch parallel circuit. What is the value of R₂?

If a $k \Omega$ resistor, a 3.3 $k \Omega$ resistor and a 5.43 $k \Omega$ resistor are connected in parallel across a 50V source, what is the current through the 5.43 $k \Omega$ resistor?

In a three-branch parallel circuit, R₁=1.2 $\mathrm { M } \Omega$ , R₂=1 $\mathrm { M } \Omega$ and R_T=0.5 $\mathrm { M } \Omega$ . Calculate R₃ .

If a 330 $\Omega$ resistor, 270 $\Omega$ resistor and 68 $\Omega$ resistor are connected in parallel, what is the approximate value for R_T?

If twelve 1.5 $\mathrm { M } \Omega$ resistors are connected in parallel across 50 V, R_T equals______

If three 75 W lamps are connected in parallel across a 125 V source, I_T equals_______

If the R_T=6.8 $\mathrm { k } \Omega$ and R₁=10 $\mathrm { k } \Omega$ in a two-branch parallel circuit, what is the value of R₂ ?

If I_R1=75 mA and I_R2=12.7 mA in a two branch parallel circuit, I_T=85.7 mA .

If a 470 $\Omega$ resistor,680 $\Omega$ resistor and 830 $\Omega$ resistor are connected in parallel, the total resistance equals_______

If a 5.5 $\mathrm { k } \Omega$ , 22 $\mathrm { k } \Omega$ and 500 $\Omega$ resistor are connected in parallel, what is RT ?

If three 4.7 $\mathrm { k } \Omega$ resistors are connected in parallel across a 12 V source, what is the value of P_T ?

A 5.2 $\mathrm { M } \Omega$ resistor, 1.2 $\mathrm { M } \Omega$ resistor and 1 $\mathrm { M } \Omega$ resistor are connected in parallel across a 15 V source. What is the total current if the 1.2 $\mathrm { M } \Omega$ resistor opens?

A three-branch parallel circuit carries a total current of 1.2 mA . If I₁=0.2 mA and I₂=0.7 mA , then what is the value of I₃ ?