Magnetism Flashcards
1
Q
What us the correlation between current and magnetic field strength?
A
Magnetic field strength increases increase in current
2
Q
What is a solenoid?
A
Uses electromagnetism to move a ferromagnet. Applying a current causes the core to move. I.e to open a valve.
3
Q
What is a relay?
A
Coil wrapped around a fixed core. When a small current is applied, the electromagnet closes a switch in a high current circuit.
4
Q
What is electromagnetic induction?
A
Phenomenon where a voltage and current are genes rated by a conductor being moved across a magnetic field.
