Question 1

Consider a wire in a magnetic field, as shown in the following figure, with a current flowing through it. What will happen to the wire?

Accepted Answer

A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field. 
C)  The current will cease flowing. 
D)  Nothing will happen. 
A)  The wire will be forced toward the north pole. 
B)  The wire will be forced perpendicular to the plane of the magnetic field. 
C)  The current will cease flowing. 
D)  Nothing will happen.

Question 2

The voltage for typical home appliances is ______________.

Accepted Answer

The answer of The voltage for typical home appliances is...

Question 3

To prevent a home electric circuit from overheating because of too much current, a(n) ______________ is used.

Accepted Answer

circuit br

Question 4

According to the law of charges, unlike charges _________.

Accepted Answer

The answer of According to the law of charges, unlike...

Question 5

A transformer with 400 turns on the primary coil is used to decrease the voltage from 3000 V to 120 V for home use. How many turns should be in the secondary coil?

Accepted Answer

A)  400 turns 
B)  10000 turns 
C)  16 turns 
D)  3520 turns 
A)  400 turns 
B)  10000 turns 
C)  16 turns 
D)  3520 turns

Question 6

Three resistors, 10 $\Omega$, 20 $\Omega$, and 30 $\Omega$, are wired in parallel and connected to a 12-V battery. How much current flows in the circuit?

Accepted Answer

The answer of Three resistors, 10 $\Omega$, 20 $\Omega$, and...

Question 7

An insulator has a positive electric charge of 4 $\times$ 10 -17 C. How many electrons were added or removed?

Accepted Answer

A)  250 electrons removed 
B)  40 electrons removed 
C)  250 electrons added 
D)  40 electrons added 
A)  250 electrons removed 
B)  40 electrons removed 
C)  250 electrons added 
D)  40 electrons added

Question 8

A(n) __________ converts electrical energy into mechanical energy.

Accepted Answer

The answer of A(n) __________ converts electrical energy into mechanical...

Question 9

Magnetic fields can deflect ______________ charges.

Accepted Answer

The answer of Magnetic fields can deflect ______________ charges....

Question 10

The direction of the magnetic field of a bar magnet is

Accepted Answer

A)  in the direction a compass would point. 
B)  in any direction. 
C)  away from the south pole. 
D)  toward the north pole. 
A)  in the direction a compass would point. 
B)  in any direction. 
C)  away from the south pole. 
D)  toward the north pole.

Question 11

A steady current of 0.15 A exists in a wire for 20 s.a. How much net charge passes by a point in the wire?
b. How many electrons does this charge represent?

Accepted Answer

9 @#LAT-DLM& 10<sup>

Question 12

The voltage in a house is measured to be 122.5 V. What is the current drawn by a 75.0-W light bulb?

Accepted Answer

The answer of The voltage in a house is measured...

Question 13

An ac voltage can be increased or decreased easily using a

Accepted Answer

A)  battery. 
B)  transformer. 
C)  fuse. 
D)  motor. 
E)  generator. 
A)  battery. 
B)  transformer. 
C)  fuse. 
D)  motor. 
E)  generator.

Question 14

In a dc motor, the polarity and current are reversed by a(n) __________.

Accepted Answer

(split-rin

Question 15

A system of 8 electrons and 4 neutrons has a net charge of

Accepted Answer

A)  -12.8 $\times$ 10-19 C. 
B)  12.8 $\times$ 10-19 C. 
C)  -6.4 $\times$ 10-19 C. 
D)  -8.0 $\times$ 10-19 C. 
E)  6.4 $\times$ 10-19 C. 
A)  -12.8 $\times$ 10-19 C. 
B)  12.8 $\times$ 10-19 C. 
C)  -6.4 $\times$ 10-19 C. 
D)  -8.0 $\times$ 10-19 C. 
E)  6.4 $\times$ 10-19 C.

Question 16

A ferromagnetic material loses this property above the ______________ temperature.

Accepted Answer

A)  domain 
B)  Faraday 
C)  Curie 
D)  Coulomb 
A)  domain 
B)  Faraday 
C)  Curie 
D)  Coulomb

Question 17

The expression V = IR is called ______________.

Accepted Answer

The answer of The expression V = IR is called...

Question 18

The mathematical form of Coulomb's law is similar to that of

Accepted Answer

A)  the second law of thermodynamics. 
B)  the second law of motion. 
C)  Kepler's second law. 
D)  the law of gravitation. 
A)  the second law of thermodynamics. 
B)  the second law of motion. 
C)  Kepler's second law. 
D)  the law of gravitation.

Question 19

A doorbell has an input voltage of 120 V. A transformer that steps the voltage down to 12 V has 500 turns on its primary. What is the number of turns on the secondary?

Accepted Answer

The answer of A doorbell has an input voltage of...

Question 20

The unit for current is the

Accepted Answer

A)  ampere. 
B)  ohm. 
C)  coulomb. 
D)  volt. 
A)  ampere. 
B)  ohm. 
C)  coulomb. 
D)  volt.

Consider a wire in a magnetic field, as shown in the following figure, with a current flowing through it. What will happen to the wire?

The voltage for typical home appliances is ______________.

To prevent a home electric circuit from overheating because of too much current, a(n) ______________ is used.

According to the law of charges, unlike charges _________.

A transformer with 400 turns on the primary coil is used to decrease the voltage from 3000 V to 120 V for home use. How many turns should be in the secondary coil?

Three resistors, 10 $\Omega$ , 20 $\Omega$ , and 30 $\Omega$ , are wired in parallel and connected to a 12-V battery. How much current flows in the circuit?

An insulator has a positive electric charge of 4 $\times$ 10^-17 C. How many electrons were added or removed?

A(n) __________ converts electrical energy into mechanical energy.

Magnetic fields can deflect ______________ charges.

The direction of the magnetic field of a bar magnet is

A steady current of 0.15 A exists in a wire for 20 s.a. How much net charge passes by a point in the wire? b. How many electrons does this charge represent?

The voltage in a house is measured to be 122.5 V. What is the current drawn by a 75.0-W light bulb?

An ac voltage can be increased or decreased easily using a

In a dc motor, the polarity and current are reversed by a(n) __________.

A system of 8 electrons and 4 neutrons has a net charge of

A ferromagnetic material loses this property above the ______________ temperature.

The expression V = IR is called ______________.

The mathematical form of Coulomb's law is similar to that of

A doorbell has an input voltage of 120 V. A transformer that steps the voltage down to 12 V has 500 turns on its primary. What is the number of turns on the secondary?

The unit for current is the

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Exam 8: Chemical Bonding

Consider a wire in a magnetic field, as shown in the following figure, with a current flowing through it. What will happen to the wire?

The voltage for typical home appliances is ______________.

To prevent a home electric circuit from overheating because of too much current, a(n) ______________ is used.

According to the law of charges, unlike charges _________.

A transformer with 400 turns on the primary coil is used to decrease the voltage from 3000 V to 120 V for home use. How many turns should be in the secondary coil?

Three resistors, 10 Ω\OmegaΩ , 20 Ω\OmegaΩ , and 30 Ω\OmegaΩ , are wired in parallel and connected to a 12-V battery. How much current flows in the circuit?

An insulator has a positive electric charge of 4 ×\times× 10 -17 C. How many electrons were added or removed?

A(n) __________ converts electrical energy into mechanical energy.

Magnetic fields can deflect ______________ charges.

The direction of the magnetic field of a bar magnet is

A steady current of 0.15 A exists in a wire for 20 s.a. How much net charge passes by a point in the wire? b. How many electrons does this charge represent?

The voltage in a house is measured to be 122.5 V. What is the current drawn by a 75.0-W light bulb?

An ac voltage can be increased or decreased easily using a

In a dc motor, the polarity and current are reversed by a(n) __________.

A system of 8 electrons and 4 neutrons has a net charge of

A ferromagnetic material loses this property above the ______________ temperature.

The expression V = IR is called ______________.

The mathematical form of Coulomb's law is similar to that of

A doorbell has an input voltage of 120 V. A transformer that steps the voltage down to 12 V has 500 turns on its primary. What is the number of turns on the secondary?

The unit for current is the

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Electricity and Magnetism

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Reactions

Organic Chemistry

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural Geology and Plate Tectonics

Minerals Rocks and Volcanoes

Surface Processes

Geologic Time

Filters

Three resistors, 10 $\Omega$ , 20 $\Omega$ , and 30 $\Omega$ , are wired in parallel and connected to a 12-V battery. How much current flows in the circuit?

An insulator has a positive electric charge of 4 $\times$ 10^-17 C. How many electrons were added or removed?