Electricity and Magnetism Pretest

The area around a charge in which the electric force is experienced by other charged objects is the

• electric force

• electric charge

• electric field

• electric current

Tags

NGSS.MS-PS2-5

Charges flow through a circuit due to differences in

• resistance.

• potential energy.

• conductivity.

• insulation.

Tags

NGSS.MS-PS3-2

Why would two electrons repel each other if they were close together?

• They have like charges, so they experience an attractive force.

• They have opposite charges, so they experience a repulsive force.

• They have like charges, so they experience a repulsive force.

• They have opposite charges, so they experience an attractive force.

The push or pull that occurs when a magnet interacts with another object is known as the

• magnetic force

• magnetic field

• magnetism

• magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

How is a magnet able to pick up bits of metal without actually touching them?

• The magnet is surrounded by an electric field that attracts the metal.

• The metal exerts a repulsive force on the magnet.

• There is an invisible magnetic field around the magnet where it exerts magnetic force.

• The electric force from the magnet attracts the bit of metal.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What do you call the relationship between electricity and magnetism?

• static electricity

• magnetic current

• electric force

• electromagnetism

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which of the following descriptions describes electromagnetic induction?

• Current running through a wire creates a magnetic field.

• Moving a conductor through a magnetic field generates a current through the conductor.

• Connecting a conductive wire to both ends of a battery allows current to flow.

• Moving north poles of two magnets away from each other decreases potential energy.

Tags

NGSS.HS-PS2-5

A step-down transformer has a voltage of 400 V through the primary coil and 200 V through the secondary coil. There are 5 loops in the secondary coil. How many loops are in the primary coil?

• 2 loops

• 5 loops

• 10 loops

• 20 loops

Which of the following is NOT a basic part of an electric current?

• conducting wires

• a transformer

• a source of electrical energy

• a device that runs on electrical energy

In a typical battery,

• the negative end has more electrical potential energy than the positive end.

• the negative end has the same amount of electrical potential energy as the positive end.

• the positive end has more electrical potential energy than the negative end.

• voltage determines which end of the battery has more electrical potential energy.

Tags

NGSS.HS-PS3-5