Define magnetic flux density .

The force exerted per unit current per unit length on a straight current-carrying conductor placed perpendicular to the magnetic field.

The flux density that causes a force of 1 N on a 1 m wire carrying a current of 1 A at right angles to the field.

Describe what happens when current is passed through a copper rod placed in a uniform magnetic field.

The rod experiences a force , causing it to accelerate in the direction of the force.

Magnetic flux density is measured in the unit called the .......... .

Magnetic flux density is measured in the unit called the tesla .

True or False? The higher the magnetic flux density of a field, the weaker the field.

False. A higher flux density means a stronger field.

What causes a current-carrying conductor to experience a force in an external magnetic field?

The conductor produces its own magnetic field, which interacts with the external field, producing a force.

What is the force on a current-carrying conductor when it is parallel to the magnetic field, and why?

The force is zero , because θ = 0° so sin θ = 0.

True or False? The force on a current-carrying conductor depends on the length of the whole wire, regardless of how much lies within the magnetic field.

False. It depends only on the length of conductor that lies within the field.

The equation for the force on a current-carrying conductor at an angle θ to a magnetic field is F = BIL .......... .

The equation for the force on a current-carrying conductor at an angle θ to a magnetic field is F = BIL sin θ .

List three ways to increase the force on a current-carrying conductor in a magnetic field.

Increase the strength of the magnetic field Increase the current flowing through the conductor Increase the length of the conductor within the field

A LevelPhysicsCambridge (CIE)Flashcards20. Magnetic FieldsForce on a Current-Carrying Conductor

Force on a Current-Carrying Conductor (Cambridge (CIE) A Level Physics): Flashcards

Exam code: 9702

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FrontMagnetic Flux Density
Define magnetic flux density.

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Cards in this collection (12)

Define magnetic flux density.
The force exerted per unit current per unit length on a straight current-carrying conductor placed perpendicular to the magnetic field.
Define the tesla.
The flux density that causes a force of 1 N on a 1 m wire carrying a current of 1 A at right angles to the field.
Describe what happens when current is passed through a copper rod placed in a uniform magnetic field.
The rod experiences a force, causing it to accelerate in the direction of the force.
Magnetic flux density is measured in the unit called the ...........
Magnetic flux density is measured in the unit called the tesla.
True or False?
The higher the magnetic flux density of a field, the weaker the field.
False.
A higher flux density means a stronger field.
What causes a current-carrying conductor to experience a force in an external magnetic field?
The conductor produces its own magnetic field, which interacts with the external field, producing a force.
State the equation for the magnetic force F on a current-carrying conductor at angle θ to a magnetic field of flux density B.
$F = B I L s i n θ$
What is the force on a current-carrying conductor when it is perpendicular to the magnetic field, and why?
The force is at its maximum, $F = B I L$ , because θ = 90° so sin θ = 1.
What is the force on a current-carrying conductor when it is parallel to the magnetic field, and why?
The force is zero, because θ = 0° so sin θ = 0.
True or False?
The force on a current-carrying conductor depends on the length of the whole wire, regardless of how much lies within the magnetic field.
False.
It depends only on the length of conductor that lies within the field.
The equation for the force on a current-carrying conductor at an angle θ to a magnetic field is F = BIL ...........
The equation for the force on a current-carrying conductor at an angle θ to a magnetic field is F = BIL sin θ.
List three ways to increase the force on a current-carrying conductor in a magnetic field.
- Increase the strength of the magnetic field
- Increase the current flowing through the conductor
- Increase the length of the conductor within the field

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