PHY3RS Magnetism, Electromagnetism, and Electric Fields

What does the movement of an electric charge cause?

A magnetic field

What happens when two objects with magnetic fields are brought near each other?

A magnetic force either causes attraction or repulsion

Is a magnet a dipole or monopole?

A dipole, because it has two poles

What does a magnet repole?

The same pole of another magnet

What happens if you cut a magnet in half?

You get two magnets, each with an N and S pole

Why does a compass point north?

The Earth is a large magnet with a magnetic pole near the North Pole

In Oersted’s experiment, what happens when a current passes through a straight conductor?

A magnetic field is created around the conductor, which can affect nearby magnetic objects.

The magnetic fields around a straight current-carrying conductor are

Perpendicular to the direction of the current and circular and cocentric around the wire

In a circular current-carrying loop, the magnetic field at the center is

Maximum

A solenoid produces a magnetic field that is

Stronger inside and uniform

Increasing the number of t urns in a solenoid or the current passing through it

Increases the magnetic field strength

The right-hand rule is used to determine

Direction of magnetic field

Two parallel current-carrying wires attract each other when

Currents are in the same direction

A current-carrying solenoid behaves like

A bar magnet

What happens to the magnetic field if current through a straight conductor is reversed?

Magnetic field direction reverses

Which of the following affects the magnetic field strength around a straight wire?

Current through the wire

Magnetic field lines emerge from

North pole and enter South Pole

In Oersted’s experiment, the compass needle deflects because

Magnetic field is created by current

The field inside a long solenoid is proportional to

Number of turns per unit length and current

A single circular loop produces a magnetic field at its center. Increasing the number of turns will

Increase the field strength

The magnetic field lines around a solenoid resemble

Field of a bar magnet

Which factor does NOT affect the magnetic field of a solenoid?

The colour of the wire

A circular loop carrying current produces

Magnetic dipole

The magnetic field around a long straight wire decreases with

Distance from thewire

The solenoid’s north pole is determined using

Right-hand rule

A current-carrying straight wire is placed between two magnets. The wire experiences

A force perpendicular to both wire and magnetic field

Which particle experiences a force in an electric field?

Any charged particles

The direction of the electric field is defined as the direction of a force on a

Positive Charge

Electric field strength between two point charges depends on

Both magnitude and distance

Two positive charges are placed near each other, they will

Repel

Coulomb’s law gives the force between two point charges. The force is

Inversely proportional to distance squared

A test charge in an electric field experiences a force of 4N at a field strength of 2 N/C. The charge is

2C

Equipotential surfaces are always

Perpendicular to field lines

The electric field inside a conductor in electrostatic equilibrium is

Zero

Which configuration produces a uniform electric field?

Two parallel plates with opposite charges

If the distance between two point charges is doubled, the electric force between them

Reduces to a quarter

A charge of 10 micro-Coulomb's is placed in a uniform field of 500 N/C. The direction of the force on the charge is:

Same as the field