electricity and magnetism

42問 • 2年前

Zna Reah

通報

問題一覧

is the phenomenon associated with either stationary or moving electric charges.

electricity

the source of the electric charge could be an

elementary particle

electron, proton, ion

negative charge

electron

positive charge

proton

any larger body that has an imbalance of positive and negative charge

ion

positive and negative charges

attracts each other (electric charge)

like charges

repel each other

is defined as the physical phenomenon produced by moving electric charge

magnetism

produces attraction and repulsion between objects

magnetism

electricity is based on

positive charges, negative charges

there is no known

magnetic monopoles (magnetism)

any magnetic particle or object has a

north pole, south pole

with the directions based on the orientation of the Earth's magnetic field

north and south poles

4 types of magnets

u-shaped magnet, bar magnet, ring magnet, horseshoe magnet

likes poles of a magnet (magnetic pole)

repel each other

opposite poles

attract one another

The word electromagnetism comes from a combination of the Greek works

elektron, magnetis lithos

elektron, meaning

amber

magnetis lithos, meaning

magnesian stone

which is a magnetic iron ore

magnesian stone

were familiar with electricity and magnetism, but considered them to be two separate phenomena.

ancient greeks

are closely related

electricity, magnetism

generate a magnetic field

power lines

rotating magnets in a generator produce

electricity

is a device which is used to produce electric energy, which can be stored in batteries or can be directly supplied to the homes, shops, offices, etc.

electric generator (generator)

electric generators work on the principle of

electromagnetic induction

a copper coil tightly wound onto a metal core

conductor coil

is rotated rapidly between the poles of a horseshoe type magnet.

conductor coil

The conductor coil along with its core is known as

armature

is connected to a shaft of a mechanical energy source such as a motor and rotated.

armature

can be provided by engines operating.on fuels such as diesel, petrol, natural gas, etc. or via renewable energy sources such as a wind turbine, water turbine, solar-powered turbine, etc.

mechanical energy required

it cuts the magnetic field which lies between the two poles of the magnet.

when coil rotates

will interfere with the electrons in the conductor to induce a flow of electric current inside it.

magnetic field

work per unit charge

voltage

is a machine that can convert electric energy into mechanical energy (specifically kinetic energy, or the energy of motion).

electric motor

This is typically achieved by exploiting the relationship between electricity and magnetism.

electric motor

may be powered by an AC current, such as that flowing from your wall outlet, or DC current such as that supplied by a battery.

electric motors

The basic principle behind an electric motor is that there needs to be a ______ that is free to rotate in the presence of an external magnetic field.

coil of wire

is passed through the wire coil

current

the interaction between the current and the field produces

torque

causing the coil to rotate.

torque

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問題一覧

is the phenomenon associated with either stationary or moving electric charges.

electricity

the source of the electric charge could be an

elementary particle

electron, proton, ion

negative charge

electron

positive charge

proton

any larger body that has an imbalance of positive and negative charge

ion

positive and negative charges

attracts each other (electric charge)

like charges

repel each other

is defined as the physical phenomenon produced by moving electric charge

magnetism

produces attraction and repulsion between objects

magnetism

electricity is based on

positive charges, negative charges

there is no known

magnetic monopoles (magnetism)

any magnetic particle or object has a

north pole, south pole

with the directions based on the orientation of the Earth's magnetic field

north and south poles

4 types of magnets

u-shaped magnet, bar magnet, ring magnet, horseshoe magnet

likes poles of a magnet (magnetic pole)

repel each other

opposite poles

attract one another

The word electromagnetism comes from a combination of the Greek works

elektron, magnetis lithos

elektron, meaning

amber

magnetis lithos, meaning

magnesian stone

which is a magnetic iron ore

magnesian stone

were familiar with electricity and magnetism, but considered them to be two separate phenomena.

ancient greeks

are closely related

electricity, magnetism

generate a magnetic field

power lines

rotating magnets in a generator produce

electricity

is a device which is used to produce electric energy, which can be stored in batteries or can be directly supplied to the homes, shops, offices, etc.

electric generator (generator)

electric generators work on the principle of

electromagnetic induction

a copper coil tightly wound onto a metal core

conductor coil

is rotated rapidly between the poles of a horseshoe type magnet.

conductor coil

The conductor coil along with its core is known as

armature

is connected to a shaft of a mechanical energy source such as a motor and rotated.

armature

can be provided by engines operating.on fuels such as diesel, petrol, natural gas, etc. or via renewable energy sources such as a wind turbine, water turbine, solar-powered turbine, etc.

mechanical energy required

it cuts the magnetic field which lies between the two poles of the magnet.

when coil rotates

will interfere with the electrons in the conductor to induce a flow of electric current inside it.

magnetic field

work per unit charge

voltage

is a machine that can convert electric energy into mechanical energy (specifically kinetic energy, or the energy of motion).

electric motor

This is typically achieved by exploiting the relationship between electricity and magnetism.

electric motor

may be powered by an AC current, such as that flowing from your wall outlet, or DC current such as that supplied by a battery.

electric motors

The basic principle behind an electric motor is that there needs to be a ______ that is free to rotate in the presence of an external magnetic field.

coil of wire

is passed through the wire coil

current

the interaction between the current and the field produces

torque

causing the coil to rotate.

torque