Magnetism and the Motor Effect (EdExcel)

studied byStudied by 0 people
0.0(0)
learn
LearnA personalized and smart learning plan
exam
Practice TestTake a test on your terms and definitions
spaced repetition
Spaced RepetitionScientifically backed study method
heart puzzle
Matching GameHow quick can you match all your cards?
flashcards
FlashcardsStudy terms and definitions

1 / 19

encourage image

There's no tags or description

Looks like no one added any tags here yet for you.

20 Terms

1
What materials are attracted to magnets?
Iron, Steel, Nickel, and Cobalt.
New cards
2
Name a few examples of non-magnetic materials.
Wood, Plastic, Aluminium, and Copper.
New cards
3
What are the two poles of a magnet?
North-seeking pole (N) and South-seeking pole (S).
New cards
4
What happens when like poles of a magnet come together?
They repel each other.
New cards
5
What is a permanent magnet?
A magnet that produces its own persistent magnetic field and retains magnetism over time.
New cards
6
What is an induced magnet?
A material that becomes magnetic when placed in a magnetic field and loses magnetism when removed.
New cards
7
How do magnetic field lines indicate magnetic strength?
The closer the field lines are together, the stronger the magnetic field.
New cards
8
How is the direction of the magnetic field determined?
By the tangent to the field line at that point.
New cards
9
What creates a magnetic field around a wire?
An electric current flowing through the wire.
New cards
10
Which rule is used to determine the direction of the magnetic field around a current-carrying wire?
The Right-Hand Grip Rule.
New cards
11
What is a solenoid?
A coil of insulated wire that enhances the magnetic field effect.
New cards
12
What occurs when a solenoid is wrapped around a ferromagnetic core?
An electromagnet is created, producing a much stronger magnetic field.
New cards
13
What is the motor effect?
The phenomenon where a current-carrying conductor experiences a force in a magnetic field.
New cards
14
What is Fleming's Left-Hand Rule used for?
To determine the direction of the force on a current-carrying conductor in a magnetic field.
New cards
15
What three factors can increase the force on a conductor in a magnetic field?
Increasing magnetic flux density, increasing current, and increasing length of the conductor.
New cards
16
What is the equation for the force on a current-carrying conductor in a magnetic field?
F = B × I × l.
New cards
17
What are the basic components of a DC motor?
Rotor (Armature), Magnets, Commutator, and Brushes.
New cards
18
What does the commutator do in a DC motor?
It reverses the direction of the current in the coil every half rotation.
New cards
19
What is the purpose of the brushes in a DC motor?
To allow current to flow to the rotating commutator and coil.
New cards
20
How does the commutator ensure continuous rotation in a DC motor?
By reversing the direction of the current which maintains the turning effect in one direction.
New cards
robot