Coil of Wire in a Magnetic Field
Physics: Cambridge International GCSE Supplement, topic 4.15.4
Current Carrying Coil of Wire in a Magnetic Field
In a magnetic field, a coil of wire carrying a current (a current-carrying coil of wire) experiences forces that make it rotate about its axis. The size of the turning force acting on the coil can be increased in three ways.
Number of turns on the coil
- Increasing the number of turns on the coil increases the size of the turning force.
Current through the coil
- Increasing the current through the coil increases the size of the turning force.
Magnetic field strength
- Increasing the strength of the magnetic field increases the size of the turning force.
Test yourself on Coil of Wire in a Magnetic Field
Which of these increase the turning force on a current-carrying coil of wire in a magnetic field?