GCSE Physics - The motor Effect and Electric motors (AQA) Final Review Exam And All Correct Answers.
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Course
GCSE Physics
Institution
GCSE Physics
What is the motor effect? - Answer A force experienced by a current-carrying wire in a magnetic field
What happens when a wire carrying a current is exposed to the magnetic field of another magnet? - Answer A force is produced perpendicular to the direction of the magnetic field produced. ...
GCSE Physics - The motor Effect and
Electric motors (AQA) Final Review
Exam And All Correct Answers.
What is the motor effect? - Answer A force experienced by a current-carrying wire in a magnetic field
What happens when a wire carrying a current is exposed to the magnetic field of another magnet? -
Answer A force is produced perpendicular to the direction of the magnetic field produced. This is the
motor effect
What equation calculates the force produced by the motor effect - Answer Force = magnetic flux
density (T) x current(A) x length (m)
What is the magnetic flux density? - Answer A measure of the strength of the magnetic field
What are the 3 factors that affect the size of the force of a wire? - Answer - The magnetic flux density
- Current
- Length of the wire
In Flemings left hand rule what does your thumb, middle finger and index finger represent? - Answer -
Thumb = Direction of the force
- Index finger = Direction of the magnetic field
- Middle finger = Direction of current
What happens when the wire carrying the current is coiled? - Answer The motor effect acting on it
causes the wire to rotate
What happens as current flows from negative to positive in an electric motor? - Answer The force
produced in each side of the coil acts in the opposite direction causing the coil to rotate overall
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