Ch 24 – Flashcards

Magnetic compasses reportedly were first used for navigation by

In general, a common magnet has

Surrounding every magnet is

Magnetic fields are produced by

Magnetism is due to the motion of electrons as they

An iron nail is more strongly attracted to the

Magnetic field lines about a current-carrying wire

When a current-carrying wire is bent into a loop, its magnetic field inside the loop

The lift experienced by Maglev trains is due to magnetic

When an electron passes through the magnetic field of a horseshoe magnet, the electron's

Although a magnet can change the direction of travel of an electron beam, it cannot change its

Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is

Into which stable force field can a proton be placed at rest without being acted upon by a force?

The force on an electron moving in a magnetic field will be least when its direction is

Solar winds headed in Earth's direction are deviated mainly by

Earth's magnetic field is

The source of all magnetism is

Whereas electric charges can be isolated, magnetic poles

Surrounding every stationary electron is

The conventional direction of magnetic field lines outside a magnet are from

Magnetic field strength about a magnet is strongest where magnetic field lines are

The shape of a magnetic field surrounding a current-carrying conductor is

A beam of electrons can pass through a magnetic field without being deflected if the direction of the beam is

Place an iron rod inside a current-carrying coil of wire and you

A galvanometer indicates

A galvanometer can be calibrated to measure

The direction of the force exerted on a moving charge in a magnetic field is

Magnet A has twice the magnetic field strength of Magnet B and at a certain distance pulls on magnet B with a force of 100 N. The amount of force that magnet A exerts on magnet B is

Biomagnetism has been detected in

If you break a bar magnet in half you'll

An iron rod becomes magnetic when

Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a

As the number of loops in a current-carrying wire is increased, the

A current-carrying coil of wire is

Which force field can increase a moving electron's speed?

A current-carrying wire in a magnetic field

If a compass is moved from the Northern Hemisphere to the Southern Hemisphere, its magnetic needle will change direction

Pigeons navigate primarily by

The end of a compass needle that points to the south pole of a magnet is the

Into which stable force field can a proton be placed at rest without being acted upon by a force?

The force exerted on an electron moving in a magnetic field is maximum when the electron moves

Which force field can accelerate an electron?

A beam of singly-charged ions entering a magnetic field are swept into circular paths. The wider paths are those of

The intensity of cosmic rays bombarding the Earth's surface is most at the

The force that acts between a pair of magnetic poles depends on

The magnetic fields of a pair of nearby magnets can

A beam of electrons passing through a magnetic field experiences maximum deflection if the direction of the beam is

An electron beam directed through a magnetic field

When an electron passes through the magnetic field of a horseshoe magnet, the electron's

An aurora borealis high above the atmosphere is due to

In the atoms of most materials the fields of individual electrons

No net force acts on a loop of wire in a magnetic field when

Surrounding every moving electron is

Wood does not have magnetic properties because it contains no

A current-carrying loop of wire experiences no tendency to rotate in a magnetic field when

The force a magnetic field exerts on a current-carrying wire is maximum when the wire is oriented

A superconducting magnet uses