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 used for in real life?
It is used to predict in which direction a current-carrying wire will move in a magnetic field so make sure that you revise it well. If the two ends of the wire used to make the coil were connected directly to the electricity supply, they would soon twist together, preventing the coil from turning.
What devices use the motor effect?
Electric motors are found in many household devices e.g. tumble dryers, washing machines, vacuum cleaners, electric knives, food mixers, hair dryers and electric toothbrushes. A coil of wire carrying a current in a magnetic field experiences a force that tends to make it rotate.
What is the cause 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 effect of motor?
A current-carrying wire or coil can exert a force on a permanent magnet. This is called the motor effect. The wire could also exert a force on another nearby current-carrying wire or coil.
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.
How can a motor be made more powerful?
Motor can be made more powerful by winding the coil on a soft iron core of by increasing the number of turns of the coil.
Why will a motor not work without a commutator?
No, a direct current motor cannot run without a commutator because there is no induced electromotive force inside the armature. The commutator plays the function of supplying current to the armature from the brush. That is why the armature removed will not supply the motor.
What are 3 ways to increase the strength of an electromagnet?
- wrapping the coil around a piece of iron (such as an iron nail)
- adding more turns to the coil.
- increasing the current flowing through 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 is the difference between the motor effect and the generator effect?
Can you please explain the motor effect, generator effect and dynamos in physics? When a current carrying wire is in a magnetic field it experiences a force. … The generator effect is the induction of a potential difference when a wire experiences a change in magnetic field).
How does a basic electric motor work?
This simple electric motor works by the magnetic force F = IL x B. The current goes around the coil so that it points one direction in one end of the loop and in the other direction at the other end of the loop. The magnetic field at both of these spots points in the same direction.
Who created the motor effect?
Description. This simple looking object was made by Michael Faraday in 1822. Its simplicity masks its true importance as the first surviving electric motor. In 1820 Hans Christian Ørsted announced his discovery that the flow of an electric current through a wire produced a magnetic field around the wire.
How does current affect force?
Current is directly proportional to magnetic force for a straight current carrying conductor in a uniform magnetic field. So the force is directly proportional to the size of the current. … If the current is increased by five times the force will also increase by five times.
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.