Parallel Circuits - General Questions (2)

Directions to Solve

Parallel Circuits - General Questions

A sudden increase in the total current into a parallel circuit may indicate

A.	a drop in source voltage
B.	an open resistor
C.	an increase in source voltage
D.	either a drop in source voltage or an open resistor

Answer: Option C

Explanation:

No answer description available for this question.

10.

In a certain three-branch parallel circuit, R₁ has 12 mA through it, R₂ has 15 mA through it, and R₃ has 25 mA through it. After measuring a total of 27 mA, you can say that

A.	R3 is open
B.	R1 is open
C.	R2 is open
D.	the circuit is operating properly

Answer: Option A

Explanation:

No answer description available for this question.

11.

Four 8 speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers is 12 V, the amplifier must be able to deliver to the speakers

A.	18 W
B.	1.5 W
C.	48 W
D.	72 W

Answer: Option D

Explanation:

No answer description available for this question.

12.

Five 100 resistors are connected in parallel. If one resistor is removed, the total resistance is

A.	25 Ω
B.	500 Ω
C.	100 Ω
D.	20 Ω

Answer: Option A

Explanation:

1/R = 1/R1 + 1/R2 + 1/R3 + 1/R4

1/R = 1/100 + 1/100 + 100 + 1/100

1/R = 4/100

1/R = 1/25

Therefore R = 25 ohm.

13.

Four resistors of equal value are connected in parallel. If the total voltage is 15 V and the total resistance is 600 , the current through each parallel resistor is

A.	25 mA
B.	100 mA
C.	6.25 mA
D.	200 mA

Answer: Option C

Explanation:

No answer description available for this question.

14.

Five light bulbs are connected in parallel across 110 V. Each bulb is rated at 200 W. The current through each bulb is approximately

A.	2.2 A
B.	137 mA
C.	1.8 A
D.	9.09 A

Answer: Option C

Explanation:

No answer description available for this question.

15.

A 470 resistor, a 220 resistor, and a 100 resistor are all in parallel. The total resistance is approximately

A.	790
B.	470
C.	60
D.	30

Answer: Option C

Explanation:

1/R = (1/470 + 1/220 + 1/100)

R = 59.98 ohm

16.

The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is

A.	1.2 W
B.	4.8 W
C.	0.3 W
D.	12 W

Answer: Option B

Explanation:

No answer description available for this question.

Parallel Circuits - General Questions (2)

Parallel Circuits - General Questions

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