Question 1

Like charges _________,unlike charges __________.

Accepted Answer

repel,attract

Question 2

A heater is rated at 1200 watts for a 120-volt source.
-The current in amperes drawn by the heater is

Accepted Answer

A)  0.1.
B)  10.
C)  144,000.
D)  none of the above.

Question 3

Ohmic heating is

Accepted Answer

A)  always undesirable.
B)  used in light bulbs.
C)  what makes fuses "blow".
D)  all of the above.

Question 4

Lightning is dangerous to humans because lightning strokes

Accepted Answer

A)  carry large currents.
B)  have high voltages.
C)  have no resistance.
D)  fry whatever they hit.

Question 5

Why do we use fuses?

Accepted Answer

A)  to eliminate shock hazards
B)  to prevent fires
C)  to save on the cost of electricity
D)  to store charge

Question 6

Semiconductor technology has been the basis for many new electronic devices.

Accepted Answer

A) True 
 B)False

Question 7

​Match each item with the correct statement below.
-consists of charges flowing back and forth

Accepted Answer

A)  ​AC
B)  ​attract
C)  ​critical temperature
D)  ​electric current
E)  ​DCF) ​electric fieldG) ​negative ionH) ​positive ionI) ​repelJ) ​resistanceK) ​semiconductorL) ​transformerM) ​superconductorN) ​voltageO) ​electric chargeP) ​ohmic heating

Question 8

​Match each item with the correct statement below.
-has zero resistance

Accepted Answer

A)  ​AC
B)  ​attract
C)  ​critical temperature
D)  ​electric current
E)  ​DCF) ​electric fieldG) ​negative ionH) ​positive ionI) ​repelJ) ​resistanceK) ​semiconductorL) ​transformerM) ​superconductorN) ​voltageO) ​electric chargeP) ​ohmic heating

Question 9

​Match each item with the correct statement below.
-like charges do this

Accepted Answer

A)  ​AC
B)  ​attract
C)  ​critical temperature
D)  ​electric current
E)  ​DCF) ​electric fieldG) ​negative ionH) ​positive ionI) ​repelJ) ​resistanceK) ​semiconductorL) ​transformerM) ​superconductorN) ​voltageO) ​electric chargeP) ​ohmic heating

Question 10

​Match each item with the correct statement below.
-used to change AC voltages

Accepted Answer

A)  ​AC
B)  ​attract
C)  ​critical temperature
D)  ​electric current
E)  ​DCF) ​electric fieldG) ​negative ionH) ​positive ionI) ​repelJ) ​resistanceK) ​semiconductorL) ​transformerM) ​superconductorN) ​voltageO) ​electric chargeP) ​ohmic heating

Question 11

When a 12-volt car battery is short circuited with a wire,the current drawn from the battery is 100 amperes.The resistance of the wire is

Accepted Answer

A)  zero.
B)  0.12 ohms.
C)  100/12 = 8.33 ohms.
D)  1200 ohms.
E)  none of the above.

Question 12

Superconductivity is lost when a certain critical temperature is exceeded.

Accepted Answer

A) True 
 B)False

Question 13

-The light bulbs in this circuit are connected in

Accepted Answer

A)  parallel.
B)  series.
C)  neither parallel nor series.
D)  a short circuit. A

Question 14

A battery operating a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 4 ohms.The voltage of the battery is __________.

Accepted Answer

The answer of A battery operating a large flashlight produces...

Question 15

A heater is rated at 1200 watts for a 120-volt source.
-The current drawn by the heater is 10 amperes.

Accepted Answer

A) True 
 B)False

Question 16

The energy used by a 100-watt light bulb in 1 hour is 360,000 joules

Accepted Answer

A) True 
 B)False

Question 17

The loss of usable energy in cables used to conduct electricity from power plants to cities is cause by ________________.

Accepted Answer

ohmic heating

Question 18

Four things that the resistance of a conducting material depends on are __________,__________,__________ and ___________.

Accepted Answer

compositio...

Question 19

Voltage is a measure of the energy per unit charge supplied by a battery.

Accepted Answer

A) True 
 B)False

Question 20

​Match each item with the correct statement below.
-an atom with fewer electrons than protons

Accepted Answer

A)  ​AC
B)  ​attract
C)  ​critical temperature
D)  ​electric current
E)  ​DCF) ​electric fieldG) ​negative ionH) ​positive ionI) ​repelJ) ​resistanceK) ​semiconductorL) ​transformerM) ​superconductorN) ​voltageO) ​electric chargeP) ​ohmic heating

Exam 7: Electricity

Like charges _________,unlike charges __________.

Correct Answerverifiedrepel,attract

A heater is rated at 1200 watts for a 120-volt source. -The current in amperes drawn by the heater is

Correct AnswerverifiedShow Answer

Ohmic heating is

Correct AnswerverifiedShow Answer

Lightning is dangerous to humans because lightning strokes

Correct AnswerverifiedShow Answer

Why do we use fuses?

Correct AnswerverifiedShow Answer

Semiconductor technology has been the basis for many new electronic devices.

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -consists of charges flowing back and forth

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -has zero resistance

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -like charges do this

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -used to change AC voltages

Correct AnswerverifiedShow Answer

When a 12-volt car battery is short circuited with a wire,the current drawn from the battery is 100 amperes.The resistance of the wire is

Correct AnswerverifiedShow Answer

Superconductivity is lost when a certain critical temperature is exceeded.

Correct AnswerverifiedShow Answer

-The light bulbs in this circuit are connected in

Correct AnswerverifiedA

A battery operating a large flashlight produces a current of 2 amperes in a light bulb that has a resistance of 4 ohms.The voltage of the battery is __________.

Correct AnswerverifiedShow Answer

A heater is rated at 1200 watts for a 120-volt source. -The current drawn by the heater is 10 amperes.

Correct AnswerverifiedShow Answer

The energy used by a 100-watt light bulb in 1 hour is 360,000 joules

Correct AnswerverifiedShow Answer

The loss of usable energy in cables used to conduct electricity from power plants to cities is cause by ________________.

Correct Answerverifiedohmic heating

Four things that the resistance of a conducting material depends on are __________,__________,__________ and ___________.

Correct Answerverifiedcompositio...View AnswerShow Answer

Voltage is a measure of the energy per unit charge supplied by a battery.

Correct AnswerverifiedShow Answer

​Match each item with the correct statement below. -an atom with fewer electrons than protons

Correct AnswerverifiedShow Answer

Like charges _,unlike charges __.

Correct Answer
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repel,attract

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Match each item with the correct statement below. -consists of charges flowing back and forth

Correct Answer
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Match each item with the correct statement below. -has zero resistance

Correct Answer
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Match each item with the correct statement below. -like charges do this

Correct Answer
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Match each item with the correct statement below. -used to change AC voltages

Correct Answer
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A

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ohmic heating

Four things that the resistance of a conducting material depends on are ,, and _.

Correct Answer
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compositio...
View Answer

Correct Answer
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Match each item with the correct statement below. -an atom with fewer electrons than protons

Correct Answer
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