Q.1

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.2

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.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
Which is considered to be the common reference for a parallel circuit?
  • Voltage
  • Current
  • Power
  • Resistance
Q.6
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.7
A parallel circuit is also used as a divider for:
  • conductance
  • voltage
  • power
  • current
Q.8
What procedure should be followed when troubleshooting with an ammeter or voltmeter?
  • Short the leads and adjust.
  • Check the meter’s 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.9
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.10
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.11
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.12
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.13
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.14
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.15
Components that connect in parallel form:
  • branches
  • open circuits
  • short circuits
  • a voltage divider
Q.16
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.17
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.18
What is the product-over-sum result ofand 6800?
  • 150
  • 146.7
  • 0.006
  • 6800
Q.19
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.20
The sum of the currents into a junction is equal to the sum of the currents out of that junction.
  • True
  • False
Q.21
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.22
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.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
  • 1 A
  • 7 A
  • Unknown
  • The larger of the two
Q.24
If one of the resistors in a parallel circuit is removed, the total resistance
  • Decreases
  • Increases
  • Remains the same
  • Doubles
Q.25
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.26
Parallel resistors are connected between the same two points.
  • True
  • False
Q.27
The number of current paths equals the number of resistors in parallel.
  • True
  • False
Q.28
A parallel circuit acts as a current divider.
  • True
  • False
Q.29
If there are a total ofmA into a parallel circuit consisting of three branches, and two of the branch currents aremA andmA, the third branch current is
  • 50 mA
  • 70 mA
  • 120 mA
  • 40 mA
Q.30
ThreeΩ 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
0 h : 0 m : 1 s