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
Select an option to see the answer and solution.
Three 47 Ω resistors are connected in parallel across a 110 volt source. The current drawn from the source is approximately
A. 2.3 A
B. 780 mA
C. 47 mA
D. 7.06 A
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
A parallel circuit acts as a current divider.
Select an option to see the answer and solution.
The number of current paths equals the number of resistors in parallel.
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
The following resistors are in parallel across a voltage source: 220 Ω, 470 Ω, and 560 Ω. The resistor with the least current is
A. 220 Ω
B. 470 Ω
C. 560 Ω
D. Impossible to determine without knowing the voltage
Select an option to see the answer and solution.
Parallel resistors are connected between the same two points.
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
If one of the resistors in a parallel circuit is removed, the total resistance
A. Decreases
B. Increases
C. Remains the same
D. Doubles
Select an option to see the answer and solution.
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance
A. Is less than 6 kΩ
B. Is greater than 1.2 kΩ
C. Is less than 1.2 kΩ
D. Is less than 600 Ω
Select an option to see the answer and solution.
The total resistance of a parallel circuit is 50 Ω. If the total current is 120 mA, the current through the 270 Ω resistor that makes up part of the parallel circuit is approximately
A. 22 mA
B. 120 mA
C. 220 mA
D. 50 mA
Select an option to see the answer and solution.
A set of Christmas tree lights is connected in parallel across a 110 V source. The filament of each light bulb is 1.8 kΩ. The current through each bulb is approximately
A. 610 mA
B. 18 mA
C. 110 mA
D. 61 mA
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
The sum of the currents into a junction is equal to the sum of the currents out of that junction.
Select an option to see the answer and solution.