記憶度
6問
16問
0問
0問
0問
アカウント登録して、解答結果を保存しよう
問題一覧
1
work per unit charge
voltage
2
electric generators work on the principle of
electromagnetic induction
3
is connected to a shaft of a mechanical energy source such as a motor and rotated.
armature
4
any larger body that has an imbalance of positive and negative charge
ion
5
magnetis lithos, meaning
magnesian stone
6
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
7
The word electromagnetism comes from a combination of the Greek works
elektron, magnetis lithos
8
is defined as the physical phenomenon produced by moving electric charge
magnetism
9
electricity is based on
positive charges, negative charges
10
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
11
generate a magnetic field
power lines
12
The conductor coil along with its core is known as
armature
13
4 types of magnets
u-shaped magnet , bar magnet, ring magnet, horseshoe magnet
14
is the phenomenon associated with either stationary or moving electric charges.
electricity
15
like charges
repel each other
16
are closely related
electricity , magnetism
17
opposite poles
attract one another
18
a copper coil tightly wound onto a metal core
conductor coil
19
is rotated rapidly between the poles of a horseshoe type magnet.
conductor coil
20
will interfere with the electrons in the conductor to induce a flow of electric current inside it.
magnetic field
21
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)
22
This is typically achieved by exploiting the relationship between electricity and magnetism.
electric motor
23
elementary particle
electron, proton, ion
24
is a machine that can convert electric energy into mechanical energy (specifically kinetic energy, or the energy of motion).
electric motor
25
the interaction between the current and the field produces
torque
26
were familiar with electricity and magnetism, but considered them to be two separate phenomena.
ancient greeks
27
any magnetic particle or object has a
north pole, south pole
28
positive and negative charges
attracts each other (electric charge)
29
which is a magnetic iron ore
magnesian stone
30
it cuts the magnetic field which lies between the two poles of the magnet.
when coil rotates
31
negative charge
electron
32
rotating magnets in a generator produce
electricity
33
the source of the electric charge could be an
elementary particle
34
elektron, meaning
amber
35
likes poles of a magnet (magnetic pole)
repel each other
36
there is no known
magnetic monopoles (magnetism)
37
produces attraction and repulsion between objects
magnetism
38
causing the coil to rotate.
torque
39
positive charge
proton
40
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
41
with the directions based on the orientation of the Earth's magnetic field
north and south poles
42
is passed through the wire coil
current