Q.1.
Four 8 
speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers isV, the amplifier must be able to deliver to the speakers
-
18 W -
1.5 W -
48 W -
72 W
Q.2.
In a five-branch parallel circuit, there aremA of current in each branch. If one of the branches opens, the current in each of the other four branches is
-
48 mA -
12 mA -
0 A -
3 mA
Q.3.
Three resistors are connected in parallel across avolt source. The current drawn from the source is approximately
-
2.3 A -
780 mA -
47 mA -
7.06 A
Q.4.
When a 1.6 k resistor and a resistor are connected in parallel, the total resistance is
-
greater than 1.6 k -
greater than 120 but less than 1.6 k -
less than 120 but greater than 100 -
less than 100
Q.5.
Three resistors are connected in parallel across avolt source. The current drawn from the source is approximately
-
2.3 A -
780 mA -
47 mA -
7.06 A
Q.6.
When a 1.6 k resistor and a resistor are connected in parallel, the total resistance is
-
greater than 1.6 k -
greater than 120 but less than 1.6 k -
less than 120 but greater than 100 -
less than 100
Q.7.
Which is considered to be the common reference for a parallel circuit?
- Voltage
- Current
- Power
- Resistance
Q.8.
Which are the better test devices used to isolate a suspected open component within a parallel circuit?
- a voltmeter or an ohmmeter
- neither an ammeter nor a voltmeter
- a wattmeter or a voltmeter
- an ammeter or an ohmmeter
Q.9.
A parallel circuit is also used as a divider for:
- conductance
- voltage
- power
- current
Q.10.
What procedure should be followed when troubleshooting with an ammeter or voltmeter?
- Short the leads and adjust.
- Check the meters external power supply.
- Start with the highest scale and adjust down to a lower scale.
- Start with the lowest scale and adjust up to a higher scale.
Q.11.
IfmA of current leaves a node that hadmA entering from one branch, how much current would enter from the other?
- 250 mA
- 300 mA
- 550 mA
- 800 mA
Q.12.
Kirchhoff's current law for parallel circuits states that the:
- sum of all branch voltages equals zero
- total circuit resistance is less than the smallest branch resistor
- sum of currents into a junction is equal to the difference of all the branch currents
- sum of the total currents flowing out of a junction equals the sum of the total currents flowing into that junction
Q.13.
In a parallel resistive circuit:
- there is more than one current path between two points
- the voltage applied divides between the branches
- the total branch power exceeds the source power
- the total circuit conductance is less than the smallest branch conductance
Q.14.
What are the individual values of two parallel resistors whose RT is 8 ohms, when one has double the resistance of the other?
- 2.7 ohms and 5.3 ohms
- 8 ohms and 16 ohms
- 10 ohms and 20 ohms
- 12 ohms and 24 ohms
Q.15.
If two parallel-connected resistors dissipate 6 watts andwatts of power, then what is the total power loss?
- 3.75 watts
- 4 watts
- 16 watts
- 60 watts
Q.16.
A parallel circuit differs from a series circuit in that a parallel circuit has
- no path for current flow
- fewer paths for current flow
- one path for current flow
- more than one path for current flow
Q.17.
Components that connect in parallel form:
- branches
- open circuits
- short circuits
- a voltage divider
Q.18.
What happens to total resistance in a circuit with parallel resistors if one of them opens?
- It increases.
- It halves.
- It remains the same.
- It decreases.
Q.19.
When parallel resistors are of three different values, which has the greatest power loss?
- The smallest resistance
- The largest resistance
- They have the same power loss.
- Voltage and resistance values are needed.
Q.20.
What is the product-over-sum result ofand 6800?
- 150
- 146.7
- 0.006
- 6800
Q.21.
The voltage across any branch of a parallel circuit:
- varies as the total current varies
- is inversely proportional to total circuit resistance
- is equally applied to all branch conductances
- is dropped in proportion to each branch resistance
Q.22.
The sum of the currents into a junction is equal to the sum of the currents out of that junction.
- True
- False
Q.23.
Five light bulbs are connected in parallel acrossV. Each bulb is rated atW. The current through each bulb is approximately
- 2.2 A
- 137 mA
- 1.8 A
- 9.09 A
Q.24.
A set of Christmas tree lights is connected in parallel across aV source. The filament of each light bulb is 1.8 kΩ. The current through each bulb is approximately
- 610 mA
- 18 mA
- 110 mA
- 61 mA
Q.25.
The total resistance of a parallel circuit isΩ. If the total current ismA, the current through theΩ resistor that makes up part of the parallel circuit is approximately
- 22 mA
- 120 mA
- 220 mA
- 50 mA
Q.26.
Six resistors are in parallel. The two lowest-value resistors are both 1.2 kΩ. The total resistance
- Is less than 6 kΩ
- Is greater than 1.2 kΩ
- Is less than 1.2 kΩ
- Is less than 600 Ω
Q.27.
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
- 1 A
- 7 A
- Unknown
- The larger of the two
Q.28.
If one of the resistors in a parallel circuit is removed, the total resistance
- Decreases
- Increases
- Remains the same
- Doubles
Q.29.
When an additional resistor is connected across an existing parallel circuit, the total resistance
- Remains the same
- Decreases by the value of the added resistor
- Increases by the value of the added resistor
- Decreases
Q.30.
Parallel resistors are connected between the same two points.
- True
- False