Chapter 5

What is the principal reservoir for excess electric charge?

A) Clouds
B) The atmosphere
C) Lightning rod
D) Water pipes
E) The earth

The unit of electrostatic charge is the:

A) Electron volt
B) Newton
C) Ampere
D) Volt
E) Coulomb

Objects become electrified because of:

A) An excess of protons
B) The transfer of neutrons
C) An excess of neutrons
D) The transfer of protons
E) The transfer of electrons

The unit of electric potential is the:

A) Coulomb
B) Newton
C) Ampere
D) Ohm
E) Volt

Which of the following is the best electric insulator?
A) Water
B) Copper
C) Nickel
D) Wood
E) Aluminum

The electrical resistance of wire increases as the diameter of the:

A) Wire decreases
B) Insulator decreases
C) Insulator increases
D) Power supply increases
E) Wire increases

The flow of 1 C/s in a conductor is equal to:

A) 1 V
B) 1 eV
C) 1 Ω
D) 1 A
E) 1 kVp

The distinct difference between alternating current (AC) and direct current (DC) is that:

A) DC electron flow is in one direction
B) DC can attain higher voltage
C) DC electron flow varies in amplitudeE) DC has higher electrical resistance
D) DC can attain higher current

The unit of electric power is the:

A) Hertz
B) Volt
C) Joule
D) Watt
E) Newton

Which of the following would likely be classified as ferromagnetic material?

A) Air
B) Water
C) Glass
D) Lead
E) Iron

If two magnets are brought together, north-to-north poles will ___________, whereas north-to-south poles will _____________.

A) Attract; attract
B) Repel; attract
C) Attract; repel
D) Repel; repel

When a charged particle moves in a straight line, a magnetic field is:

A) Created and has the same sign as the particle
B) Erased
C) Created perpendicular to the particle motion
D) Created along the direction of particle motion

When iron is brought near a permanent magnet, the lines of the magnetic field are:

A) Unaffected
B) Attracted to the iron
C) Repelled by the iron
D) Repelled by the magnet
E) Attracted to the magnet

An electron moving in a conductor:

A) Produces light in the conductor
B) Produces a magnetic field perpendicular to the conductor
C) Causes the conductor to bend
D) Causes the conductor to behave as a bar magnet

The experimental link connecting electric and magnetic forces as discovered by:

A) Faraday
B) Lenz
C) Edison
D) Oersted

The fact that an electric current is induced if the conductor is in a changing magnetic field:

A) was discovered by Lenz
B) is known as Faraday’s law
C) is known as Ohm’s law
D) is the statement of the second law of electromagnetic

The term electromagnetic induction refers to the production of:

A) An electromagnet
B) A magnetic field
C) A static charge
D) An electric current
E) Electromagnetic radiation

The magnetic field produced by an electromagnet has:

A) Alternating pole
sB) Neither a north nor a south pole
C) Only a north pole
D) Only a south pole
E) Properties similar to a bar magnet

When the right-hand rule is applied to a straight wire, the thumb indicates the direction of the:

A) Circuit resistance
B) Electric potential
C) Magnetic field
D) Electric current
E) Electric field

In an electric motor:

A) A commutator ring is not necessary
B) A coil of wire is mechanically rotated
C) A transformer is discharged
D) Electric current is supplied to a coil of wire
E) AC is changed to DC