A current-carrying wire or coil can exert a force on a permanent magnet. This is called the motor effect. … The force increases if the strength of the magnetic field and/or current increases.
What demonstrates the motor effect?
The motor effect is the term used when a current-carrying wire in the presence of a magnetic field experiences a force. A simple experimental demonstration will show you that this is true. Place a wire that is connected to a power pack in between the poles of a horseshoe magnet.
What is the motor effect a level?
The Motor Effect
When a current passes along a wire in a magnetic field, a force is exerted on the wire. This is called the motor effect.
How can you increase the strength of the motor effect?
The size of the force is increased if:
- the current in the wire increases;
- the strength of the magnetic field increases;
- the length of wire inside the magnetic field is increased.
What factors influence the direction of the motor effect?
The magnitude of the force on a straight conductor in a magnetic field depends on the following factors:
- The strength of the external magnetic field. …
- The magnitude of the current in the conductor. …
- The length of the conductor in the field. …
- The angle between the conductor and the external magnetic field.
How do you reverse the motor effect?
The direction of rotation of the coil can be reversed by:
- reversing the direction of the current OR.
- reversing the direction of the magnetic field (changing over the north and south poles).
What is Fleming left-hand rule and right hand rule?
Difference Between Fleming’s Left-Hand and Right-Hand Rule
|Left-Hand Rule||Right-Hand Rule|
|The purpose of the rule is to find the direction of motion in an electric motor||The purpose of the rule is to find the direction of induced current when a conductor moves in a magnetic field.|
What is Fleming’s left-hand rule?
Fleming’s left-hand rule states that:
When a current-carrying conductor is placed in an external magnetic field, the conductor experiences a force perpendicular to both the field and to the direction of the current flow. It was invented by John Ambrose Fleming.
How can you increase the strength of a magnetic field?
The strength of the magnetic field around a solenoid can be increased by:
- increasing the number of turns on the coil.
- increasing the current.
- placing an iron core inside the solenoid.
How do you make a motor stronger?
Increase the number of turns in the coil
The more turns of wire that cut through the magnet’s magnetic field, the stronger the force on the wires will be and, again, the spinning shaft will turn with more force. With more force, a greater load can be placed at the end of the shaft.
What happens if you increase the current in a motor?
An increase in current is a danger to the motor only if that current exceeds the motor’s nameplate current rating. When amps go above the nameplate rating, heat begins to build up in the motor. Without a timely correction, this heat will damage the motor.
What produces magnetic fields within a motor?
Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor. Electric motors are used in all sorts of applications.
How is the motor effect used in an AC motor?
How does an AC motor work? … Unlike in a DC motor, where you send power to the inner rotor, in an AC motor you send power to the outer coils that make up the stator. The coils are energized in pairs, in sequence, producing a magnetic field that rotates around the outside of the motor.
Why is the motor effect important?
The Motor Effect is a very important physical phenomenon that can be summarised as follows: A current carrying conductor inside a magnetic field will experience a force, called the Motor Effect Force. … Either way, for the Motor Effect to occur, there must be a current flowing through the conductor.
Which rule is used in electric motor?
Distinction between the right-hand and left-hand rule
Fleming’s left-hand rule is used for electric motors, while Fleming’s right-hand rule is used for electric generators.