Question 1

How come birds can land on overhead power lines without getting electrocuted?

Accepted Answer

A) Their feet are good insulators. 
B) They are saved by their small size. 
C) Both their feet are on the same wire,so they don't complete a circuit. 
D) They are just lucky,I guess. 
A) Their feet are good insulators. 
B) They are saved by their small size. 
C) Both their feet are on the same wire,so they don't complete a circuit. 
D) They are just lucky,I guess.

Question 2

The SI unit of electric charge is e,the charge on the electron.

Accepted Answer

A) True 
 B)False

Question 3

The light bulb used in a slide projector draws a current of 4 amperes when operating on 120 volts.
(a)What is the bulb's resistance?
(b)What is the bulb's power consumption?

Accepted Answer

(a)30 ohms

Question 4

If you think of a battery as an electric charge 'pump,' the battery voltage is analogous to

Accepted Answer

A) rate of fluid flow. 
B) pressure. 
C) flow velocity. 
D) water. 
E) none of the above. 
A) rate of fluid flow. 
B) pressure. 
C) flow velocity. 
D) water. 
E) none of the above.

Question 5

The resistance of the heater is __________.

Accepted Answer

The answer of The resistance of the heater is __________....

Question 6

Superconductivity is lost when a certain __________ is exceeded.

Accepted Answer

critical t

Question 7

If three identical bulbs are connected in series across a 12-V battery,the voltage across each bulb will be

Accepted Answer

A) 12 V. 
B) 4 V. 
C) different. 
D) none of the above. 
A) 12 V. 
B) 4 V. 
C) different. 
D) none of the above.

Question 8

An atom with fewer electrons than protons is a negative ion.

Accepted Answer

A) True 
 B)False

Question 9

A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts.
-If two slide projectors are connected in series across the same 120-volt source,the current drawn from the source remains at 6 amperes.

Accepted Answer

A) True 
 B)False

Question 10

Two charged bodies separated by a distance d exert a repulsive electrical force on each other.The signs of the charges on the two bodies are + and -.

Accepted Answer

A) True 
 B)False

Question 11

Voltage is the force on a charged object divided by the charge on the object.

Accepted Answer

A) True 
 B)False

Question 12

Two charged bodies separated by a distance d exert an attractive electrical force on each other.The signs of the charges on the two bodies are __________ and __________.

Accepted Answer

The signs of the charges on the two bodi

Question 13

A heater is rated at 1200 watts for a 120-volt source.
-Why is most matter electrically neutral?

Accepted Answer

A) It contains no charges. 
B) There are equal amounts of positive and negative charges present. 
C) The charge on the electrons and protons in the material is too small to notice. 
D) none of the above 
A) It contains no charges. 
B) There are equal amounts of positive and negative charges present. 
C) The charge on the electrons and protons in the material is too small to notice. 
D) none of the above

Question 14

If the current drawn from a 12-volt car battery is 100 amperes when it is short circuited with a wire,the resistance of the wire is 0.12 ohms.

Accepted Answer

A) True 
 B)False

Question 15

If you think of a battery as an electric charge "pump," the battery voltage is analogous to __________.

Accepted Answer

The answer of If you think of a battery as...

Question 16

A quantity that is measured in ohms is

Accepted Answer

A) voltage. 
B) current. 
C) resistance. 
D) electric field. 
E) critical temperature. 
A) voltage. 
B) current. 
C) resistance. 
D) electric field. 
E) critical temperature.

Question 17

A simple electrical circuit has a constant voltage power supply and a variable resistor as a circuit.As you increase the resistance the current flow _______________.

Accepted Answer

The answer of A simple electrical circuit has a constant...

Question 18

The type of current supplied by a battery is __________.

Accepted Answer

The answer of The type of current supplied by a...

Question 19

An electric toaster operating on 120 volts draws a current of 6 amperes.The resistance of the toaster is

Accepted Answer

A) 0.05 ohms. 
B) 20 ohms. 
C) 720 ohms. 
D) none of the above. 
A) 0.05 ohms. 
B) 20 ohms. 
C) 720 ohms. 
D) none of the above.

Question 20

A solid metal wire has a certain resistance.It is heated and carefully stretched to form a longer,thinner wire.After it cools,the resistance is _______ than it was before.

Accepted Answer

A) greater 
B) less 
C) no more 
D) lighter 
A) greater 
B) less 
C) no more 
D) lighter

How come birds can land on overhead power lines without getting electrocuted?

The SI unit of electric charge is e,the charge on the electron.

The light bulb used in a slide projector draws a current of 4 amperes when operating on 120 volts. (a)What is the bulb's resistance? (b)What is the bulb's power consumption?

If you think of a battery as an electric charge 'pump,' the battery voltage is analogous to

The resistance of the heater is __________.

Superconductivity is lost when a certain __________ is exceeded.

If three identical bulbs are connected in series across a 12-V battery,the voltage across each bulb will be

An atom with fewer electrons than protons is a negative ion.

A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts. -If two slide projectors are connected in series across the same 120-volt source,the current drawn from the source remains at 6 amperes.

Two charged bodies separated by a distance d exert a repulsive electrical force on each other.The signs of the charges on the two bodies are + and -.

Voltage is the force on a charged object divided by the charge on the object.

Two charged bodies separated by a distance d exert an attractive electrical force on each other.The signs of the charges on the two bodies are and .

A heater is rated at 1200 watts for a 120-volt source. -Why is most matter electrically neutral?

If the current drawn from a 12-volt car battery is 100 amperes when it is short circuited with a wire,the resistance of the wire is 0.12 ohms.

If you think of a battery as an electric charge "pump," the battery voltage is analogous to __________.

A quantity that is measured in ohms is

A simple electrical circuit has a constant voltage power supply and a variable resistor as a circuit.As you increase the resistance the current flow _______________.

The type of current supplied by a battery is __________.

An electric toaster operating on 120 volts draws a current of 6 amperes.The resistance of the toaster is

A solid metal wire has a certain resistance.It is heated and carefully stretched to form a longer,thinner wire.After it cools,the resistance is _______ than it was before.

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Exam 7: Electricity

How come birds can land on overhead power lines without getting electrocuted?

The SI unit of electric charge is e,the charge on the electron.

The light bulb used in a slide projector draws a current of 4 amperes when operating on 120 volts. (a)What is the bulb's resistance? (b)What is the bulb's power consumption?

If you think of a battery as an electric charge 'pump,' the battery voltage is analogous to

The resistance of the heater is __________.

Superconductivity is lost when a certain __________ is exceeded.

If three identical bulbs are connected in series across a 12-V battery,the voltage across each bulb will be

An atom with fewer electrons than protons is a negative ion.

A light bulb used in a slide projector draws a current of 6 amperes when operating on 120 volts. -If two slide projectors are connected in series across the same 120-volt source,the current drawn from the source remains at 6 amperes.

Two charged bodies separated by a distance d exert a repulsive electrical force on each other.The signs of the charges on the two bodies are + and -.

Voltage is the force on a charged object divided by the charge on the object.

Two charged bodies separated by a distance d exert an attractive electrical force on each other.The signs of the charges on the two bodies are __________ and __________.

A heater is rated at 1200 watts for a 120-volt source. -Why is most matter electrically neutral?

If the current drawn from a 12-volt car battery is 100 amperes when it is short circuited with a wire,the resistance of the wire is 0.12 ohms.

If you think of a battery as an electric charge "pump," the battery voltage is analogous to __________.

A quantity that is measured in ohms is

A simple electrical circuit has a constant voltage power supply and a variable resistor as a circuit.As you increase the resistance the current flow _______________.

The type of current supplied by a battery is __________.

An electric toaster operating on 120 volts draws a current of 6 amperes.The resistance of the toaster is

A solid metal wire has a certain resistance.It is heated and carefully stretched to form a longer,thinner wire.After it cools,the resistance is _______ than it was before.

The Study of Motion

Newtons Laws

Energy and Conservation Laws

Physics of Matter

Temperature and Heat

Waves and Sound

Electromagnetism and Em Waves

Optics

Atomic Physics

Nuclear Physics

Special Relativity and Elementary Particles

Filters

Two charged bodies separated by a distance d exert an attractive electrical force on each other.The signs of the charges on the two bodies are and .