Magnetic Fields

What do magnetic field lines represent?

• Distance and time of travel

• Temperature and pressure of the environment

• Density and viscosity of the fluid

• Direction and strength of the magnetic field

How is magnetic field strength measured?

• Counting the number of magnetic poles in the field

• Using a magnetometer to detect the intensity of the magnetic field in Teslas.

• Using a thermometer to measure the temperature of the magnetic field

• Estimating the strength based on the color of the magnetic material

In which direction do magnetic field lines point?

• From east pole to west pole outside the magnet and from west pole to east pole inside the magnet.

• From top pole to bottom pole outside the magnet and from bottom pole to top pole inside the magnet.

• From north pole to south pole outside the magnet and from south pole to north pole inside the magnet.

• From positive pole to negative pole outside the magnet and from negative pole to positive pole inside the magnet.

What is the formula to calculate the magnetic force on a straight current wire?

• F = I * L * B * sin(θ)

• F = I * L * B * cos(θ)

• F = I * B * sin(θ)

• F = I * L * sin(θ)

What is the Lorentz Force?

• The Lorentz Force is the force of friction between two charged particles.

• The Lorentz Force is the force of tension in a charged wire.

• The Lorentz Force is the force of gravity acting on a moving charge.

• The Lorentz Force is the combination of electric and magnetic forces acting on a point charge due to its motion through an electromagnetic field.

How is the magnetic force calculated for a particle moving in a magnetic field?

• F = qvBcos(theta)

• F = qvB

• F = qvBsin(theta)

• F = qvBtan(theta)

What happens to a charged particle moving perpendicular to a magnetic field?

• It moves in a straight line

• It disappears

• It moves in a zigzag pattern

• It moves in a circular path

Explain the concept of magnetic field direction in terms of the right-hand rule.

• The magnetic field direction is determined by the pinky finger

• The magnetic field direction is opposite to the direction of current flow

• The right-hand rule states that when the thumb points in the direction of the current flow, the curled fingers indicate the direction of the magnetic field.

• The left-hand rule is used to determine the magnetic field direction

What factors affect the strength of the magnetic force on a current-carrying wire?

• Thickness of the wire

• Temperature of the wire

• Color of the wire

• Magnitude of current, length of wire, strength of magnetic field, angle between wire and magnetic field

Describe the behavior of a charged particle in a magnetic field.

• The behavior of a charged particle in a magnetic field is to experience a force perpendicular to its velocity and the magnetic field direction, resulting in circular or helical motion.

• Charged particles move parallel to the magnetic field lines

• Charged particles experience no force in a magnetic field

• Charged particles move in the opposite direction of the magnetic field