Electromagnetism quiz Honors

Last updated almost 2 years ago

10 questions

1

Which statement best explains how iron can become a magnet?

Electrons are easily removed,

Electrons spin in a unique direction.

Atoms have smaller nuclei.

Atoms are strongly bonded together.

Two parallel copper wires are each carrying the same electrical current in the same direction. Which statement explains how they respond to each other?

They repel each other, because they have similar magnetic fields.

They strengthen each other, because they have similar magnetic fields.

They repel each other, because they have opposite magnetic fields.

They strengthen each other, because they have opposite magnetic fields.

Which of the following electromagnets would have the greatest magnetic field?

The diagram below shows a bar magnet within a coil of conducting wire. The magnet is moved back and forth. The magnet never has contact with the wire.

As the magnet is moved, the wire will

decrease in temperature.

demagnetize the bar magnet.

become negatively charged.

have an electric current.

The diagram below shows current flow through a wire.
Which of the following represents the magnetic field resulting from the current?

Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy changes?

wind energy ➡️ mechanical energy ➡️ solar energy

wind energy ➡️ mechanical energy ➡️ electrical energy

wind energy ➡️ electrical energy ➡️ mechanical energy

wind energy ➡️ solar energy ➡️ electrical energy

In the accompanying diagram, a potential difference is induced in a rectangular wire loop as it is rotated at constant speed between two magnetic poles.

If the direction of the field is reversed and the speed of rotation is doubled, the magnitude of the maximum induced voltage will be

twice as great

the same

four times as great

one-half as great

What is the main advantage of using alternating current (AC) over direct current (DC) when transmitting electricity?

AC power lines need less insulation than DC power lines.

AC is not affected by the use of transformers, but the use of DC requires transformers.

AC has fewer power surge problems than DC

AC makes it easier to step voltage up or down with transformers, as compared to DC.

The primary coil of a transformer has 400 turns; the secondary coil has 1,000 turns. An alternating current is sent through the primary coil. The voltage in the primary coil has an amplitude of 17 V. Which statement best describes the voltage amplitude in the secondary coil?

between 17 V and 50 V, because the coils form a step-up transformer

between 17 V and 50 V, because transformer coils are conductors

between 0 V and 17 V, because transformer coils are insulators

between 0 V and 17 V, because the coils form a step-down transformer

The diagram shows a wire loop rotating between magnetic poles. During 360 degrees of rotation from the position shown, the induced voltage changes in

neither magnitude nor direction

both magnitude and direction

direction, only

magnitude, only

Which statement best explains how iron can become a magnet?

Electrons are easily removed,

Electrons spin in a unique direction.

Atoms have smaller nuclei.

Atoms are strongly bonded together.

Two parallel copper wires are each carrying the same electrical current in the same direction. Which statement explains how they respond to each other?

They repel each other, because they have similar magnetic fields.

They strengthen each other, because they have similar magnetic fields.

They repel each other, because they have opposite magnetic fields.

They strengthen each other, because they have opposite magnetic fields.

Which of the following electromagnets would have the greatest magnetic field?

The diagram below shows a bar magnet within a coil of conducting wire. The magnet is moved back and forth. The magnet never has contact with the wire.

As the magnet is moved, the wire will

decrease in temperature.

demagnetize the bar magnet.

become negatively charged.

have an electric current.

The diagram below shows current flow through a wire.
Which of the following represents the magnetic field resulting from the current?

Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy changes?

wind energy ➡️ mechanical energy ➡️ solar energy

wind energy ➡️ mechanical energy ➡️ electrical energy

wind energy ➡️ electrical energy ➡️ mechanical energy

wind energy ➡️ solar energy ➡️ electrical energy

In the accompanying diagram, a potential difference is induced in a rectangular wire loop as it is rotated at constant speed between two magnetic poles.

If the direction of the field is reversed and the speed of rotation is doubled, the magnitude of the maximum induced voltage will be

twice as great

the same

four times as great

one-half as great

What is the main advantage of using alternating current (AC) over direct current (DC) when transmitting electricity?

AC power lines need less insulation than DC power lines.

AC is not affected by the use of transformers, but the use of DC requires transformers.

AC has fewer power surge problems than DC

AC makes it easier to step voltage up or down with transformers, as compared to DC.

The primary coil of a transformer has 400 turns; the secondary coil has 1,000 turns. An alternating current is sent through the primary coil. The voltage in the primary coil has an amplitude of 17 V. Which statement best describes the voltage amplitude in the secondary coil?

between 17 V and 50 V, because the coils form a step-up transformer

between 17 V and 50 V, because transformer coils are conductors

between 0 V and 17 V, because transformer coils are insulators

between 0 V and 17 V, because the coils form a step-down transformer

The diagram shows a wire loop rotating between magnetic poles. During 360 degrees of rotation from the position shown, the induced voltage changes in

neither magnitude nor direction

both magnitude and direction

direction, only

magnitude, only

Electromagnetism quiz Honors

Electromagnetism quiz Honors

Which statement best explains how iron can become a magnet?

Two parallel copper wires are each carrying the same electrical current in the same direction. Which statement explains how they respond to each other?

Which of the following electromagnets would have the greatest magnetic fi eld?

The diagram below shows a bar magnet within a coil of conducting wire. The magnet is moved back and forth. The magnet never has contact with the wire.As the magnet is moved, the wire will

The diagram below shows current flow through a wire.Which of the following represents the magnetic field resulting from the current?

Windmills are used to convert wind energy into a more useful form. In most cases, there are three steps in this process. The energy is in a different form at each step. Which of the following flowcharts shows the most likely order of the energy changes?

In the accompanying diagram, a potential difference is induced in a rectangular wire loop as it is rotated at constant speed between two magnetic poles.If the direction of the field is reversed and the speed of rotation is doubled, the magnitude of the maximum induced voltage will be

What is the main advantage of using alternating current (AC) over direct current (DC) when transmitting electricity?

The primary coil of a transformer has 400 turns; the secondary coil has 1,000 turns. An alternating current is sent through the primary coil. The voltage in the primary coil has an amplitude of 17 V. Which statement best describes the voltage amplitude in the secondary coil?

The diagram shows a wire loop rotating between magnetic poles. During 360 degrees of rotation from the position shown, the induced voltage changes in

Which of the following electromagnets would have the greatest magnetic field?

The diagram below shows a bar magnet within a coil of conducting wire. The magnet is moved back and forth. The magnet never has contact with the wire.

As the magnet is moved, the wire will

The diagram below shows current flow through a wire.
Which of the following represents the magnetic field resulting from the current?

In the accompanying diagram, a potential difference is induced in a rectangular wire loop as it is rotated at constant speed between two magnetic poles.

If the direction of the field is reversed and the speed of rotation is doubled, the magnitude of the maximum induced voltage will be

The diagram shows a wire loop rotating between magnetic poles. During 360 degrees of rotation from the position shown, the induced voltage changes in