Parallel Circuits - General Questions (3)

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Parallel Circuits - General Questions

17.

A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 k. The current through each bulb is approximately

A.	610 mA
B.	18 mA
C.	110 mA
D.	61 mA

Answer: Option D

Explanation:

No answer description available for this question.

18.

Four equal-value resistors are connected in parallel. Ten volts are applied across the parallel circuit and 2 mA are measured from the source. The value of each resistor is

A.	12.5 Ω
B.	200 Ω
C.	20 KΩ
D.	50 Ω

Answer: Option C

Explanation:

10/(R/4) = 2 mA

40/R = 2 mA

R = 40/2 mA

= 40/0.002 A

= 20000 kohm (20 kohm)

19.

Three lights are connected in parallel across a 120 volt source. If one light burns out,

A.	the remaining two will glow dimmer
B.	the remaining two will glow brighter
C.	the remaining two will not light
D.	the remaining two will glow with the same brightness as before

Answer: Option D

Explanation:

No answer description available for this question.

20.

If there are a total of 120 mA into a parallel circuit consisting of three branches, and two of the branch currents are 40 mA and 10 mA, the third branch current is

A.	50 mA
B.	70 mA
C.	120 mA
D.	40 mA

Answer: Option B

Explanation:

No answer description available for this question.

21.

When a 1.6 k resistor and a 120 resistor are connected in parallel, the total resistance is

A.	greater than 1.6 kΩ
B.	greater than 120Ω but less than 1.6 kΩ
C.	less than 120Ω but greater than 100 Ω
D.	less than 100 Ω

Answer: Option C

Explanation:

No answer description available for this question.

22.

When an additional resistor is connected across an existing parallel circuit, the total resistance

A.	remains the same
B.	decreases by the value of the added resistor
C.	increases by the value of the added resistor
D.	decreases

Answer: Option D

Explanation:

No answer description available for this question.

23.

The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is

A.	1 A
B.	7 A
C.	unknown
D.	the larger of the two

Answer: Option B

Explanation:

No answer description available for this question.

24.

The total resistance of a parallel circuit is 50 . If the total current is 120 mA, the current through the 270 resistor that makes up part of the parallel circuit is approximately

A.	22 mA
B.	120 mA
C.	220 mA
D.	50 mA

Answer: Option A

Explanation:

No answer description available for this question.

Parallel Circuits - General Questions (3)

Parallel Circuits - General Questions

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