Electricity and Magnetism Quiz

What is the direction of the magnetic field lines around a straight current-carrying wire?

• Straight lines

• Random patterns

• Concentric circles

• Spiral shapes

State the right-hand rule for determining the direction of the magnetic field around a current-carrying wire.

• The direction of the magnetic field is given by the direction in which your fingers point away from the wire.

• The direction of the magnetic field is given by the direction in which your fingers point towards the wire.

• The direction of the magnetic field is given by the direction in which your fingers move up and down the wire.

• The direction of the magnetic field is given by the direction in which your fingers curl around the wire.

Explain the concept of magnetic field lines and their properties.

• Magnetic field lines are physical lines made of iron that show the direction of the magnetic field

• Magnetic field lines are farther apart where the magnetic field is stronger

• Magnetic field lines are imaginary lines used to represent the strength and direction of a magnetic field. They are continuous, forming closed loops, and are closer together where the magnetic field is stronger.

• Magnetic field lines are discontinuous and do not form closed loops

What is the unit of magnetic field strength?

• joule (J)

• ampere (A)

• tesla (T) or gauss (G)

• watt (W)

Describe the behavior of a magnetic compass needle when placed near a current-carrying wire.

• It spins in a circle around the current-carrying wire.

• It aligns itself perpendicular to the current-carrying wire.

• It remains stationary and unaffected by the current-carrying wire.

• It aligns itself parallel to the current-carrying wire.

Explain the factors that affect the strength of the magnetic field produced by a current-carrying wire.

• Color of the wire, temperature, and length of the wire

• Voltage of the current, shape of the wire, and time of day

• Magnitude of the current, distance from the wire, and the material surrounding the wire

• Thickness of the wire, type of plug, and brand of the wire

What is the relationship between the strength of the magnetic field and the distance from the current-carrying wire?

• No relationship

• Exponential relationship

• Inverse relationship

• Direct relationship

Describe the applications of magnetic fields in everyday life.

• Refrigerators, washing machines, and toasters

• MRI machines, magnetic compasses, magnetic levitation trains, and magnetic storage devices

• Microwaves, vacuum cleaners, and bicycles

• Television, smartphones, and ovens

Orange rod is made of magnetic material. In this magnetization

process, after several stroke x will become .........pole, and y become ..........

pole

• X = South Pole and Y = North Pole

• X = North Pole and Y = South Pole

• Both X and Y = North Pole

• Both X and Y = South Pole

The blue object is a magnetic material, when it is

placed near magnet, it will become an ...

magnets with x side become ............ pole, and Y side

become .......... pole

• X = North Pole and Y = South Pole

• X = South Pole and Y = North Pole