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.
What uses 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. … 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 is the effect produced by electric motors?
An electric motor converts electrical energy into physical movement. 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 do motors work GCSE?
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. … When the electric current changes direction, the same end of the electromagnet becomes its south pole.
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 .
How does a motor work?
An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor’s magnetic field and electric current in a wire winding to generate force in the form of torque applied on the motor’s shaft.
How does a commutator work?
A commutator is a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. … By reversing the current direction in the rotating windings each half turn, a steady rotating force (torque) is produced.
What does F BIL stand for?
F = BIL (f=force, b=magnetic field, i=current, l=length of conductor)
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.
Why are electric motors important?
Electric motors impact almost every aspect of modern living. Refrigerators, vacuum cleaners, air conditioners, fans, computer hard drives, automatic car windows, and multitudes of other appliances and devices all use electric motors to convert electrical energy into useful mechanical energy.
What is the role of commutator in electric motor?
The commutator assures that the current from the generator always flows in one direction. … On DC and most AC motors the purpose of the commutator is to insure that the current flowing through the rotor windings is always in the same direction, and the proper coil on the rotor is energized in respect to the field coils.
How does an electric motor work step by step?
Large AC motors (used in things like factory machines) work in a slightly different way: they pass alternating current through opposing pairs of magnets to create a rotating magnetic field, which “induces” (creates) a magnetic field in the motor’s rotor, causing it to spin around.
Why will a motor not work without a commutator?
Why will a motor not work without a commutator? Without commutator it will not rotate and the armature oscillates between north and south poles. No motor action.
What is Fleming’s left hand rule?
Fleming’s Left-Hand Rule is a simple and accurate way to find the direction of force/motion of the conductor in an electric motor when the magnetic field direction and the current direction are known. It was originally developed by John Ambrose Fleming, an English electrical engineer, in the late 19th century.
What is Fleming’s left hand rule GCSE?
The force on a given length of wire in a magnetic field increases when: the current in the wire increases. the strength of the magnetic field increases.