Question 1

An ampere is a unit of electric

Accepted Answer

A) current. 
B) voltage. 
C) resistance. 
A) current. 
B) voltage. 
C) resistance.

Question 2

One kilowatt-hour is a unit of

Accepted Answer

A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance. 
A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance.

Question 3

Just as water flows from a region of high pressure to a region of low pressure, electric charge flows from a region of

Accepted Answer

A) high electric pressure to a region of low electric pressure. 
B) high potential energy to a region of low potential energy. 
C) deep to shallow regions. 
D) all of the above 
A) high electric pressure to a region of low electric pressure. 
B) high potential energy to a region of low potential energy. 
C) deep to shallow regions. 
D) all of the above

Question 4

One joule per coulomb is a unit of

Accepted Answer

A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance. 
A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance.

Question 5

When two lamps are connected in parallel to a battery, the electrical resistance that the battery senses is

Accepted Answer

A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of these 
A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of these

Question 6

The cause of electrical shock is predominantly

Accepted Answer

A) excess current. 
B) excess voltage. 
C) reduced resistance. 
D) none of the above 
A) excess current. 
B) excess voltage. 
C) reduced resistance. 
D) none of the above

Question 7

The number of electrons delivered daily to an average American home by an average power utility in the early 21st century was

Accepted Answer

A) zero. 
B) 110. 
C) 220. 
D) billions of billions. 
E) none of the above 
A) zero. 
B) 110. 
C) 220. 
D) billions of billions. 
E) none of the above

Question 8

Connect a pair of lamps in series and current is drawn from the battery. Connect the same lamps in parallel and the current drawn is

Accepted Answer

A) less. 
B) the same. 
C) more. 
D) sometimes more, sometimes less. 
A) less. 
B) the same. 
C) more. 
D) sometimes more, sometimes less.

Question 9

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is

Accepted Answer

A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of these 
A) more than the resistance of either lamp. 
B) less than the resistance of either lamp. 
C) none of these

Question 10

The source of electrons in a simple electric circuit is

Accepted Answer

A) the voltage source. 
B) energy stored in the voltage source. 
C) energy released by the voltage source. 
D) the electrical circuit itself. 
E) none of the above 
A) the voltage source. 
B) energy stored in the voltage source. 
C) energy released by the voltage source. 
D) the electrical circuit itself. 
E) none of the above

Question 11

A 4-ohm and 6-ohm resistor connected in parallel have an equivalent resistance of

Accepted Answer

A) 2.4 ohms. 
B) 4 ohms. 
C) 5 ohms. 
D) 5.5 ohms. 
E) 10 ohms. 
A) 2.4 ohms. 
B) 4 ohms. 
C) 5 ohms. 
D) 5.5 ohms. 
E) 10 ohms.

Question 12

One kilowatt is a unit of

Accepted Answer

A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance. 
A) energy. 
B) power. 
C) voltage. 
D) current. 
E) resistance.

Question 13

The power consumed by a device drawing 0.8 A when connected to 120 V is

Accepted Answer

A) 12 W. 
B) 15 W. 
C) 60 W. 
D) 96 W. 
E) 120 W. 
A) 12 W. 
B) 15 W. 
C) 60 W. 
D) 96 W. 
E) 120 W.

Question 14

Which is more dangerous, touching a faulty 110-volt light fixture, or a Van de Graaff generator charged to 100,000 volts?

Accepted Answer

A) touching the light fixture 
B) touching the generator 
C) touching both are about equally dangerous. 
A) touching the light fixture 
B) touching the generator 
C) touching both are about equally dangerous.

Question 15

Current that is typically 60 hertz is

Accepted Answer

A) direct current. 
B) alternating current. 
C) either of these 
D) neither of these 
A) direct current. 
B) alternating current. 
C) either of these 
D) neither of these

Question 16

If an electric toaster rated at 110 V is accidently plugged into a 220-V outlet, the current drawn by the toaster will be

Accepted Answer

A) half its normal value. 
B) the same as its normal value. 
C) twice its normal value. 
D) none of the above 
A) half its normal value. 
B) the same as its normal value. 
C) twice its normal value. 
D) none of the above

Question 17

The unit of electrical resistance is the

Accepted Answer

A) volt. 
B) ampere. 
C) ohm. 
D) none of the above 
A) volt. 
B) ampere. 
C) ohm. 
D) none of the above

Question 18

Three resistors take the shape of a triangle, one resistor in each leg. Resistance in one leg is 4 ohms, 6 ohms in a second leg, and a third leg 10 ohms. Connecting an ohm-meter across the 10-ohm resistor will show the equivalent resistance to be

Accepted Answer

A) 1.4 ohms. 
B) 5 ohms. 
C) 6.7 ohms. 
D) greater than 6.7 ohms. 
A) 1.4 ohms. 
B) 5 ohms. 
C) 6.7 ohms. 
D) greater than 6.7 ohms.

Question 19

Sometimes the current in lamps is too feeble to produce glowing of the lamp filaments, which occurs when

Accepted Answer

A) too many lamps are connected in series. 
B) too many lamps are connected in parallel. 
C) too much current is drawn by the battery. 
A) too many lamps are connected in series. 
B) too many lamps are connected in parallel. 
C) too much current is drawn by the battery.

Question 20

If you stretch a copper wire so that it is thinner, the resistance between its ends

Accepted Answer

A) decreases. 
B) remains unchanged. 
C) increases. 
A) decreases. 
B) remains unchanged. 
C) increases.

Exam 23: Electric Current

An ampere is a unit of electric

One kilowatt-hour is a unit of

Just as water flows from a region of high pressure to a region of low pressure, electric charge flows from a region of

One joule per coulomb is a unit of

When two lamps are connected in parallel to a battery, the electrical resistance that the battery senses is

The cause of electrical shock is predominantly

The number of electrons delivered daily to an average American home by an average power utility in the early 21st century was

Connect a pair of lamps in series and current is drawn from the battery. Connect the same lamps in parallel and the current drawn is

When two lamps are connected in series to a battery, the electrical resistance that the battery senses is

The source of electrons in a simple electric circuit is

A 4-ohm and 6-ohm resistor connected in parallel have an equivalent resistance of

One kilowatt is a unit of

The power consumed by a device drawing 0.8 A when connected to 120 V is

Which is more dangerous, touching a faulty 110-volt light fixture, or a Van de Graaff generator charged to 100,000 volts?

Current that is typically 60 hertz is

If an electric toaster rated at 110 V is accidently plugged into a 220-V outlet, the current drawn by the toaster will be

The unit of electrical resistance is the

Three resistors take the shape of a triangle, one resistor in each leg. Resistance in one leg is 4 ohms, 6 ohms in a second leg, and a third leg 10 ohms. Connecting an ohm-meter across the 10-ohm resistor will show the equivalent resistance to be

Sometimes the current in lamps is too feeble to produce glowing of the lamp filaments, which occurs when

If you stretch a copper wire so that it is thinner, the resistance between its ends

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The number of electrons delivered daily to an average American home by an average power utility in the early 21^st century was