Question 1

The direction of the magnetic field of a bar magnet is

Accepted Answer

A)  in the direction opposite to that in which a compass would point. 
B)  in any direction. 
C)  toward the south pole. 
D)  toward the north pole. 
A)  in the direction opposite to that in which a compass would point. 
B)  in any direction. 
C)  toward the south pole. 
D)  toward the north pole.

Question 2

A(n) ______________ is an elementary particle with a charge of +1.6 × 10-19 coulomb.

Accepted Answer

Question 3

The expression V = IR is called ______________.

Accepted Answer

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

Question 4

The unit of resistance is called a(n)

Accepted Answer

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

Question 5

A component in an automobile 12-V electrical system has a resistance of 90 Ω. How much current is in the component when in operation?

Accepted Answer

A)  100 A 
B)  0.13 A 
C)  7.5 A 
D)  1100 A 
A)  100 A 
B)  0.13 A 
C)  7.5 A 
D)  1100 A

Question 6

Power may be expressed as _____________ times resistance.

Accepted Answer

The answer of Power may be expressed as _____________ times...

Question 7

If a negatively charged object is brought near a suspended, positively charged object, the suspended object will be ______________.

Accepted Answer

The answer of If a negatively charged object is brought...

Question 8

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 9

An object may be electrically neutral, but regions may be charged by ______________.

Accepted Answer

The answer of An object may be electrically neutral, but...

Question 10

Three resistors, 20 Ω, 10 Ω, and 80 Ω, are wired in series and connected to a 120-V battery. How much current flows in this circuit?

Accepted Answer

A)  1.1 Α 
B)  20 Α 
C)  740 Α 
D)  0.0075 Α 
A)  1.1 Α 
B)  20 Α 
C)  740 Α 
D)  0.0075 Α

Question 11

If two protons are moved 3 times farther apart, the electrical force between them is what factor of the original force?

Accepted Answer

The answer of If two protons are moved 3 times...

Question 12

Three resistors, 10 Ω, 20 Ω, and 30 Ω, are wired in series and connected to a 120-V battery. How much current flows in the circuit?

Accepted Answer

The answer of Three resistors, 10 Ω, 20 Ω, and...

Question 13

A component in an automobile 12-V electrical system has a resistance of 20 Ω. How much energy is dissipated by the component each second?

Accepted Answer

A)  0.14 J 
B)  7.2 J 
C)  1.7 J 
D)  0.6 J 
A)  0.14 J 
B)  7.2 J 
C)  1.7 J 
D)  0.6 J

Question 14

One ampere × one second is a unit of

Accepted Answer

A)  power. 
B)  current. 
C)  voltage. 
D)  electric charge. 
E)  resistance. 
A)  power. 
B)  current. 
C)  voltage. 
D)  electric charge. 
E)  resistance.

Question 15

A current of 6.0 A flows through a resistance of 50 Ω. How much power is dissipated?

Accepted Answer

1.8 * 10<s

Question 16

A system of 11 protons and 15 neutrons has a net charge of

Accepted Answer

A)  17.6 × 10-19 C. 
B)  -17.6 × 10-19 C. 
C)  41.6 × 10-19 C. 
D)  11.0 × 10-19 C. 
E)  -41.6 × 10-19 C. 
A)  17.6 × 10-19 C. 
B)  -17.6 × 10-19 C. 
C)  41.6 × 10-19 C. 
D)  11.0 × 10-19 C. 
E)  -41.6 × 10-19 C.

Question 17

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 18

Voltage is defined as the ______________ per unit ______________.

Accepted Answer

A)  charge; current 
B)  work; current 
C)  charge; work 
D)  work; charge 
A)  charge; current 
B)  work; current 
C)  charge; work 
D)  work; charge

Question 19

A ferromagnetic material loses this property above the ______________ temperature.

Accepted Answer

The answer of A ferromagnetic material loses this property above...

Question 20

The law of poles states that like magnetic poles ______________ and unlike magnetic poles ______________.

Accepted Answer

The answer of The law of poles states that like...

Exam 8: Electricity and Magnetism

The direction of the magnetic field of a bar magnet is

A(n) ______________ is an elementary particle with a charge of +1.6 × 10-19 coulomb.

The expression V = IR is called ______________.

The unit of resistance is called a(n)

A component in an automobile 12-V electrical system has a resistance of 90 Ω. How much current is in the component when in operation?

Power may be expressed as _____________ times resistance.

If a negatively charged object is brought near a suspended, positively charged object, the suspended object will be ______________.

An ac voltage can be increased or decreased easily using a

An object may be electrically neutral, but regions may be charged by ______________.

Three resistors, 20 Ω, 10 Ω, and 80 Ω, are wired in series and connected to a 120-V battery. How much current flows in this circuit?

If two protons are moved 3 times farther apart, the electrical force between them is what factor of the original force?

Three resistors, 10 Ω, 20 Ω, and 30 Ω, are wired in series and connected to a 120-V battery. How much current flows in the circuit?

A component in an automobile 12-V electrical system has a resistance of 20 Ω. How much energy is dissipated by the component each second?

One ampere × one second is a unit of

A current of 6.0 A flows through a resistance of 50 Ω. How much power is dissipated?

A system of 11 protons and 15 neutrons has a net charge 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?

Voltage is defined as the ______________ per unit ______________.

A ferromagnetic material loses this property above the ______________ temperature.

The law of poles states that like magnetic poles ______________ and unlike magnetic poles ______________.

Measurement

Motion

Force and Motion

Work and Energy

Temperature and Heat

Waves and Sound

Optics and Wave Effects

Atomic Physics

Nuclear Physics

The Chemical Elements

Chemical Bonding

Chemical Reactions

Organic Chemistry

Place and Time

The Solar System

Moons and Small Solar System Bodies

The Universe

The Atmosphere

Atmospheric Effects

Structural G Eology and P Late Tectonics

Minerals, Rocks, and Volcanoes

Surface Processes

Geologic Time

Filters

A(n) ______________ is an elementary particle with a charge of +1.6 × 10^-19 coulomb.

Voltage is defined as the per unit .

The law of poles states that like magnetic poles and unlike magnetic poles .