**Chapter 18 online quiz
**

**23 questions, 300 points 13 points each
**

**(plus you get one point just
for taking the test – so it adds to 300)**

76. When
two or more resistors are connected in series to a battery

a. the total voltage across the combination is the algebraic sum of the voltages across the individual resistors.

b. the same current flows through
each resistor.

c. the equivalent resistance of the
combination is equal to the sum of the resistances of each resistor.

d. all of the above.

77. When
two or more resistors are connected in parallel to a battery,

a. the voltage across each resistor
is the same.

b. the total current flowing from
the battery equals the sum of the currents flowing through each resistor.

c. the equivalent resistance of the
combination is less than the resistance of any one of the resistors.

d. all of the above.

78. Three
identical resistors are connected in series to a battery.
If the current of 12 A flows from the battery, how much current flows
through any one of the resistors?

a. 12 A

b. 4 A

c. 36 A

d. None of the above

79. Three
identical resistors are connected in series to a 12-V battery.
What is the voltage across any one of the resistors?

a. 36 V

b. 12 V

c. 4 V

d. None of the above

80. Three
identical resistors are connected in parallel to a battery.
If the current of 12 A flows from the battery, how much current flows
through any one of the resistors?

a. 12 A

b. 4 A

c. 36 A

d. None of the above

81. Three
identical resistors are connected in parallel to a 12-V battery.
What is the voltage of any one of the resistors?

a. 36 V

b. 12 V

c. 4 V

d. None of the above

82. A
6-W
and a 12-W
resistor are connected in parallel to a 36-V battery.
What power is dissipated by the 6-W resistor?

a. 216 W

b. 48 W

c. 486 W

d. None of the above

83. As
more resistors are added in series to a constant voltage source (zero internal
resistance), the power supplied by the source

a. increases.

b. decreases.

c. does not change.

d. increases for a time and then
starts to decrease.

84. As
more resistors are added in parallel to a constant voltage source, the power
supplied by the source

a. increases.

b. decreases.

c. does not change.

d. increases for a time and then
starts to decrease.

85. If
identical resistors are connected in parallel, and a battery is connected as
shown, which resistor will have the largest current flowing through it?

a. resistor closest to the battery

b. resistor farthest to the battery

c. middle resistor

d. none

86. A
combination of 2 W
in series with 4 W
is connected in parallel with 3 W. What is the equivalent resistance?

a. 2
W

b.
3
W

c.
4
W

d.
5
W

87. When
resistors are connected in parallel, we can be certain that

a. the same current flows in each
one.

b. the potential difference across
each is the same.

c. the power dissipated in each is
the same.

d. their equivalent resistance is
greater than the resistance of any one of the individual resistances.

88. When
resistors are connected in series,

a. the same power is dissipated in
each one.

b. the potential difference across
each is the same.

c. the current flowing in each is
the same.

d. more than one of the above is
true.

89. Kirchhoff's
junction rule is an example of

a. conservation of energy.

b. conservation of charge.

c. conservation of momentum.

d. none of the above.

90. Kirchhoff's
voltage rule for a closed loop is an example of

a. conservation of energy.

b. conservation of charge.

c. conservation of momentum.

d. none of the above.

91. What
is the unit for the quantity RC?

a. Ohms

b. Volt-Ampere/ohm

c. Seconds

d. Meters

92. In
the water flow analogy, the height of the water is analogous to what electrical
quantity? Also a pump is analogous
to what?

a. potential
(voltage); a battery (or emf)

b. current
(I) ; a battery (or emf)

c. Resistance
(R) ;
a battery (or emf)

93. An
air conditioner uses 2000.watts at 120.volts.
What is its current and resistance?

a. 17.5 amperes and
3.20 ohms

b. 8.57 amperes and
5.40 ohms

c. 16.7 amperes and
7.20 ohms

d. 7.98 amperes and
3.25 ohms

94. We
pay the "power company" for

a. voltage

b. power

c. current

d. resistance

e. energy

95. In
5.0 minutes, 500. Coulombs pass
through a 24.ohm resistor. What is
the potential across the resistor?

a. 35.v

b. 30.v

c. 40.v

d. 300.v

e. 400.v

96. If
the internal resistance of my 1.5 volt battery is 0.50 ohms, what is the maximum
possible power and current that can be delivered from it?

a. 6.7 watts at 2.0 Amperes
b. 4.5 watts at 3.0 Amperes

c. 5.7 watts at 3.0 Amperes
d. 3.8 watts at 2.5 Amperes

97. The
internal resistance of a typical "12.v" auto battery is MORE or LESS
than 1.ohm?

a. MORE

b. LESS

c. none of the above