Question 1

If you measure a lower than normal total current in a parallel circuit, .

Accepted Answer

A) the power supply is off 
B) a resistor shorted 
C) all of the resistors are opened 
D) a resistor opened

Question 2

If the RT = 6.8 kΩ and R1 = 10 kΩ in a two -branch parallel circuit, what is the value of R2?

Accepted Answer

A) 3.2 kΩ 
B) 12 kΩ 
C) 21.3 kΩ 
D) 16.8 kΩ

Question 3

The maximum current that an analog meter movement can handle is called

Accepted Answer

A) full -load scale current 
B) full -scale deflection current 
C) maximum surge current 
D) maximum scale current

Question 4

If a 5.5 kΩ, 22 kΩ and 500 Ω resistor are connected in parallel, what is RT?

Accepted Answer

A) 449 Ω 
B) 28.1 kΩ 
C) 330 Ω 
D) 27.6 kΩ

Question 5

If a 4.7 kΩ resistor and 2.2 kΩ resistor are connected in parallel, the total resistance is .

Accepted Answer

A) 4700 Ω 
B) 2200 Ω 
C) greater than 2200 Ω 
D) less than 2200 Ω

Question 6

A short in one branch of a parallel circuit results in:

Accepted Answer

A) increased voltage drops in the remaining branches. 
B) increased circuit resistance. 
C) decreased power consumption. 
D) increased current flow.

Question 7

A two -branch parallel circuit contains these values: R1 = 1200 Ω, IT = 0.005 mA, I2 = 0.003 mA. What is the value of VR1?

Accepted Answer

A) 18 m V 
B) 3.6 m V 
C) 6 m V 
D) 2.4 m V

Question 8

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

Accepted Answer

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

Question 9

If a 1 MΩ resistor, 0.47 MΩ resistor and 0.5 MΩ resistor are connected in parallel across an 18V source, what is the total current if the 1 MΩ resistor opens?

Accepted Answer

A) 74.3 µA 
B) 92.3 µA 
C) 74.3 mA 
D) 92.3 mA

Question 10

-The voltage across R2 is 0 V. What is most likely the problem?

Accepted Answer

A) R1 open 
B) fuse open 
C) R2 open 
D) none of the above

Question 11

In a three -resistor parallel circuit, R1 = 0.22 MΩ and R2 = 1 MΩ. If RT = 0.1166 MΩ, then what is the value of R3?

Accepted Answer

A) 1.34 M Ω 
B) 0.134 M Ω 
C) 0.33 M Ω 
D) 13,400 Ω

Question 12

The power dissipated by any branch of a parallel circuit .

Accepted Answer

A) only depends on the total current 
B) depends on the power rating of the resistor 
C) only depends on the circuit voltage 
D) depends on the voltage and value of the resistor

Question 13

If IR1 = 0.065 mA and IR2 = 0.098 mA in a two branch parallel circuit, IT = 0.163 mA.

Accepted Answer

A) True 
 B)False

Question 14

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

Question 15

If one branch of a parallel circuit shorts, the total resistance decreases.

Accepted Answer

A) True 
 B)False

Question 16

If a 2.2 kΩ resistor and a 3.3 kΩ resistor are connected in parallel, RT equals .

Accepted Answer

A) 3.3 kΩ 
B) 2.2 kΩ 
C) greater than 2.2 kΩ 
D) less than 2.2 kΩ

Question 17

-The total current for this circuit is measured and the ammeter reads 57.8 mA. What is the problem, if any?

Accepted Answer

A) R1 open 
B) R3 open 
C) R2 open 
D) This is normal.

Question 18

If a 4.7 kΩ resistor, a 3.3 kΩ resistor and a 5.43 kΩ resistor are connected in parallel across a 50 V source, what is the current through the 5.43 kΩ resistor?

Accepted Answer

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

Question 19

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

Accepted Answer

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

Question 20

IT equals 0.1 mA in a 3 -branch parallel circuit. If I1 = 0.022 mA and I2 = 0.007 mA, I3 = ?

Accepted Answer

A) 0.071 mA 
B) 0.142 mA 
C) 0.029 mA 
D) 0.213 mA

Exam 5: Parallel Circuits