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. …
Which two things are required for the motor effect?
(I) The angle formed between the wire and the direction of the magnetic field. (θ) The length of the wire, carrying the current, in the magnetic field.
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.
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 the consequences of motor effect?
A wire carrying a current creates a magnetic field . This can interact with another magnetic field, causing a force that pushes the wire at right angles. This is called the motor effect .
What is the motor effect definition?
A wire carrying a current creates a magnetic field. This can interact with another magnetic field, causing a force that pushes the wire at right angles. This is called the motor effect.
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 can we increase the turning effect of motor?
To increase the turning effect of the coil in the motor:
- Insert a soft Iron core or cylinder into coil – to concentrate the magnetic field lines.
- Increase the number of turns in the coil.
- Increase the current in the coil.
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.
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 is the generator effect in a motor?
A potential difference or voltage is needed to make an electric current flow in a circuit. This is called electromagnetic induction and is often referred to as the generator effect . The induced voltage produces an induced current if the conductor is connected in a complete circuit.
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.
Are electromagnets permanent?
The magnetic field of electromagnets can be altered by controlling the flow of the electric current. The magnetic field of permanent magnets cannot be changed, as it remains constant. Electromagnets are temporary, as these magnets work on magnetic forces only when an electric current passes through them.
What 3 factors does Fleming’s left hand rule represent?
(HT) What 3 factors does Fleming’s left hand-rule represent? The force, the current in the conductor, the magnetic field.