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 resistances are added in a(n) ______________ circuit.

Accepted Answer

The answer of The resistances are added in a(n) ______________...

Question 3

A motor converts

Accepted Answer

A)  electricity into magnetism. 
B)  electrical energy into mechanical energy. 
C)  mechanical energy into electrical energy. 
D)  force into power. 
A)  electricity into magnetism. 
B)  electrical energy into mechanical energy. 
C)  mechanical energy into electrical energy. 
D)  force into power.

Question 4

A ferromagnetic material is magnetized by the alignment of

Accepted Answer

A)  domains. 
B)  atoms. 
C)  single magnetic dipoles. 
D)  poles. 
A)  domains. 
B)  atoms. 
C)  single magnetic dipoles. 
D)  poles.

Question 5

An object that is positively charged will

Accepted Answer

A)  attract a rubber rod stroked with fur. 
B)  attract a glass rod stroked with silk. 
C)  be polarized. 
D)  none of these 
A)  attract a rubber rod stroked with fur. 
B)  attract a glass rod stroked with silk. 
C)  be polarized. 
D)  none of these

Question 6

The unit for current is the

Accepted Answer

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

Question 7

Three resistors, 80 Ω, 10 Ω, and 70 Ω, are wired in parallel and connected to a 120-V battery. How much current flows in this circuit?

Accepted Answer

A)  0.75 Α 
B)  15 Α 
C)  950 Α 
D)  0.0021 Α 
A)  0.75 Α 
B)  15 Α 
C)  950 Α 
D)  0.0021 Α

Question 8

An insulator has a positive electric charge of 2.4 × 10 -17 C. How many electrons were added or removed?

Accepted Answer

150 electr

Question 9

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

Accepted Answer

a. 0.60 A

Question 10

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

Question 11

The electric company charges a home on the basis of consumption of

Accepted Answer

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

Question 12

A moving electric charge or a current in a magnetic field may experience a(n) ______________.

Accepted Answer

The answer of A moving electric charge or a current...

Question 13

The source of magnetism is

Accepted Answer

A)  polarization. 
B)  magnetic monopoles. 
C)  electrons. 
D)  protons. 
A)  polarization. 
B)  magnetic monopoles. 
C)  electrons. 
D)  protons.

Question 14

A 20-Ω resistor and a 30-Ω resistor are wired in parallel and connected to a 9.0-V battery.
a. How much current is drawn from the battery?
b. How much power is dissipated in the circuit?

Accepted Answer

a. 0.75 A

Question 15

A system of a proton and a neutron has a net charge of

Accepted Answer

A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero. 
A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero.

Question 16

A system of an electron, a proton, and a neutron has a net charge of

Accepted Answer

A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero. 
A)  +1.6 × 10-19 C. 
B)  -1.6 × 10-19 C. 
C)  3.2 × 10-19 C. 
D)  zero.

Question 17

If work is done on an electric charge, a ______________ is present.

Accepted Answer

A)  resistance 
B)  current 
C)  voltage 
D)  transformer 
E)  bigger charge 
A)  resistance 
B)  current 
C)  voltage 
D)  transformer 
E)  bigger charge

Question 18

Zero potential in household electricity is called ______________.

Accepted Answer

The answer of Zero potential in household electricity is called...

Question 19

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 20

Magnetic fields can deflect ______________ charges.

Accepted Answer

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

Exam 8: Electricity and Magnetism

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 resistances are added in a(n) ______________ circuit.

A motor converts

A ferromagnetic material is magnetized by the alignment of

An object that is positively charged will

The unit for current is the

Three resistors, 80 Ω, 10 Ω, and 70 Ω, are wired in parallel and connected to a 120-V battery. How much current flows in this circuit?

An insulator has a positive electric charge of 2.4 × 10 -17 C. How many electrons were added or removed?

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

The direction of the magnetic field of a bar magnet is

The electric company charges a home on the basis of consumption of

A moving electric charge or a current in a magnetic field may experience a(n) ______________.

The source of magnetism is

A 20-Ω resistor and a 30-Ω resistor are wired in parallel and connected to a 9.0-V battery. a. How much current is drawn from the battery? b. How much power is dissipated in the circuit?

A system of a proton and a neutron has a net charge of

A system of an electron, a proton, and a neutron has a net charge of

If work is done on an electric charge, a ______________ is present.

Zero potential in household electricity is called ______________.

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

Magnetic fields can deflect ______________ charges.

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

An insulator has a positive electric charge of 2.4 × 10 -¹⁷ C. How many electrons were added or removed?