Deck 11: Parallel Circuits

Question 1

The common distribution system brings two voltages on three wires into a home, and the neutral wire carries only the difference in current carried by the two outside wires.

Answer 1

True

Question 2

In a parallel circuit, the voltage across each branch ____, so the current flow through any branch can be computed by dividing the source voltage by the resistance of that branch.

A)is different
B)increases
C)decreases
D)is the same

Answer 2

D

Question 3

All parallel circuits are current dividers.

Answer 3

True

Question 4

Voltage sources, such as batteries and generators, cannot be interconnected in a parallel arrangement in order to increase the current output capability.

Question 5

If you encounter circuits where all load resistors are of identical value, to do the computation you merely take the resistance value of one device and ____ the number of branch resistors.

A)multiply it by
B)add it to
C)subtract it from
D)divide it by

Question 6

Computing the product over the sum formula is a quick way of computing the total resistance of a parallel circuit, provided that only two resistors are given.

Question 7

Each resistor develops ____ in accordance with the amount of current flowing through it.

A)resistance
B)weight
C)heat
D)branches

Question 8

The standard representation for a parallel circuit is where all resistors are drawn parallel to one another, resembling the ties between railroad tracks.

Question 9

There are ____ different methods by which the total resistance of a parallel circuit may be computed.

A)two
B)three
C)four
D)five

Question 10

The total resistance is always greater than any of the individual branch resistors.

Question 11

The total circuit power is simply the sum of all the various power dissipations on the branch resistors.

Question 12

A parallel circuit has ____ through which the current can flow.

A)more than one path
B)only one path
C)exactly two paths
D)at least three paths

Question 13

Voltage sources connected in parallel must have ____, and care must be taken to match the polarities-positive to positive and negative to negative.

A)the same voltage rating
B)different voltage ratings
C)proportionate voltage ratings
D)equal or smaller voltage ratings

Question 14

In a parallel circuit, each individual resistor is connected only to the negative pole of the battery.

Question 15

The ____ (supplied by the source) is equal to the sum of all the individual branch currents.

A)total current
B)total branch current
C)total line current
D)line current

Question 16

More current will flow through a branch having a high resistance than a branch having a low resistance.

Question 17

It is commonly assumed that American household appliances operate on 120 volts, but it is economically advantageous to operate larger heating devices, such as electric kitchen ranges and high-Btu air conditioners, on a higher voltage, namely, ____ V.

A)180
B)220
C)240
D)250

Question 18

In a parallel circuit, there is only one voltage serving all load resistors.

Question 19

One of the three rules, when used with Ohm's law, that can be applied when solving for unknown electrical quantities in parallel circuits is that ____.

A)voltage remains the same
B)voltage adds
C)voltages multiplies
D)voltage subtracts

Question 20

Electric ranges connect to the neutral as well as to the ____ wires, thus providing a dual voltage.

A)180-volt
B)220-volt
C)240-volt
D)250-volt