magnetism

Question 1

what is an induced magnet

Answer 1

an induced magnet is a magnetic material that acts as a magnet when placed in a magnetic field

Question 2

how can we increase the strength of a solenoid

Answer 2

increase the current
increase the number of tunrs of the wire
use an iron core to make it an electromagnet

Question 3

where can electromagnets be found

Answer 3

in a relay and an electric doorbell are the two main examples

Question 4

what is the formula for force regarding magnetic flux density

Answer 4

force (N) = magnetic flux denstiy (T/ tesla) * current (A) * length (m)

Question 5

whaqt do we use to ensure that the motor turns the correct way around

Answer 5

a split ring commutator

Question 6

how does an electric motor work

Answer 6

there is a loop of wire between two magnets gausing a force upwards and downwards causing the wires to spin. when the wires reach 90 degrees we reverse the direction fo the current using a split ring commutator to cause the motor to cntinue to turn in the same direction