3 factors that affect the turning effect forceon a current carrying coil in a d.c. motor
Inserting a soft iron core into the coil, Increasing the number of turn in the coil, Increasing the current in the coil
25
Which causing The speed of rotation d.c. motor increase....(Gravity -use soft iron core-Current decrease-decrease of strength of magnetic field)
use soft iron core
15
Name the effect that causes a coil of current-carrying wire in an electric motor to move (The electromagnetism effect-The motor effect -The magnetic effect)
the motor effect
15
Which rule can be used to work out which way a coil of wire rotates in a motor?
Fleming's left-hand rule
10
Give two ways you can reverse the direction of a basic dc motor?
Reverse the current, Reverse the magnetic field
25
in a simple dc motor, the direction of current in the motor coil is reserved every half-revolution to keep the coil turning in the same direction. which part of the motor enables this?
split link comutator
15
the turning effect of a current carrying coil in a magnetic field is applied in the d.c. motor(true or false)
true
10
the function of a split-ring commutator in a d.c.motor is to reserve the direction of the current in the coil once every revolution, and thus reserve the direction in which the coil turns (true/false)
false
20
the turning effect of the current-carrying coil in a d.c.motor can only be incresing the number of turns in the coil (true/false)