Current and magnetism (AQA GCSE Physics Combined Science): Flashcards
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Effect of current flowing through wire
Effect of current flowing through wire
Creates a magnetic field
Shape of field around straight current-carrying wire
Shape of field around straight current-carrying wire
Concentric circles
Right-hand rule for magnetic field direction
Right-hand rule for magnetic field direction
Thumb=current, fingers curl=field direction
Direction of conventional current
Direction of conventional current
Positive (+) to negative (-)
Relationship: current & magnetic field strength
Relationship: current & magnetic field strength
Directly proportional
Effect of doubling current on field strength
Effect of doubling current on field strength
Field strength doubles
Relationship: distance & magnetic field strength
Relationship: distance & magnetic field strength
Inversely proportional
Definition of a solenoid
Definition of a solenoid
Long coil of conducting wire wrapped in spiral
Type of magnetic field inside a solenoid
Type of magnetic field inside a solenoid
Strong and uniform
3 ways to strengthen solenoid's magnetic field
3 ways to strengthen solenoid's magnetic field
Increase current, add turns, insert iron core
What iron core in solenoid creates
What iron core in solenoid creates
An electromagnet
Key advantage of solenoids
Key advantage of solenoids
Magnetism can be turned on/off by controlling current
Meaning of 'directly proportional'
Meaning of 'directly proportional'
One increases, other increases at same rate
Meaning of 'inversely proportional'
Meaning of 'inversely proportional'
One increases, other decreases