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

 

98.  (a)True or (b)False:  The maximum current produced by a battery cannot exceed the dead short current of the battery.