Magnetic effect of current and having two magnetic fields Flashcards
How is an electromagnet made?
Passing a current through a coil of wire (solenoid) creates a magnetic field similar to that of a bar magnet.
What happens when a current flows through a wire?
A magnetic field is created around it
What happens as you move away from the current carrying wire?
The field lines spread out more and the magnetic field gets weaker.
What rule finds the direction of the magnetic field of a straight current carrying wire?
Right-hand grip rule
What is electromagnetic force?
The force applied on a current carrying wire placed in a magnetic field perpendicular to the direction of current.
What rule finds the direction of electromagnetic force?
Flemming’s left hand rule.
What does the thumb show?
Direction of electromagnetic force
What does the index finger show?
Direction of magnetic field - north to south
What does the middle finger show?
Direction of current
