The _______ of an electromagnetic field can be changed by altering the electrical current
Strength
1 of 20
A ____ (v) is the unit of measure for calculating the power of a circuit
Watt
2 of 20
Although we cannot see magnetic fields, we can detect them using iron _______
Filings
3 of 20
If two magnets are placed near each other, their magnetic fields combine to produce a ______ field
Single
4 of 20
According to the ____ ____ rule, if you have a wire carrying an electric current, you point your thumb in the direction of the current and your fingers "curl" in the direction of the magnetic field
Left Hand
5 of 20
The magnetic field around a coil electromagnet can be strengthened by putting more _____ on the coil
Loops
6 of 20
In a loud speaker, when a current is run through the wire will experience a _____ that pushes a cone which makes the sound
Force
7 of 20
The _______ point is where the magnetic field from one magnet cancels out the other, so the magnetic force on anything at this point is zero
Neutral
8 of 20
Electromagnets are _________ magnets as they can be switched on and off
Temporary
9 of 20
The magnetic field around a coil electromagnet can be ____________ by increasing the current
Strengthened
10 of 20
The field _____ run from the north pole to the south pole of the magnet
Lines
11 of 20
An electromagnet consists of a current carrying coil _______ around an iron core
Wrapped
12 of 20
If there is a ____ with a current running through in a magnetic field it will experience a force (i.e it will be pushed up and down)
Wire
13 of 20
The National ____ is the high-voltage electric power transmission network in connecting power stations and major substations
Grid
14 of 20
One ______ is defined as the current that flows with electric charge of one Coulomb per second
Ampere
15 of 20
The magnetic field around a coil electromagnet can be increased by placing iron or steeL ______ of the coil
Inside
16 of 20
In a DC motor, the force the wire experiences turns it around, this turns a "split ring __________" so the charge goes from "brushes" into the wires
Commutator
17 of 20
A magnetic _____ involves the lines of force surrounding a permanent magnet or a moving charged particle
Field
18 of 20
(P = I x V) Current is measured in _______ (a)
Amperes
19 of 20
A ____ (v) is the unit of measure for calculating the electromotive force (emf) or the voltage across a conductor
Volt
20 of 20
Other cards in this set
Card 2
Front
A ____ (v) is the unit of measure for calculating the power of a circuit
Back
Watt
Card 3
Front
Although we cannot see magnetic fields, we can detect them using iron _______
Back
Card 4
Front
If two magnets are placed near each other, their magnetic fields combine to produce a ______ field
Back
Card 5
Front
According to the ____ ____ rule, if you have a wire carrying an electric current, you point your thumb in the direction of the current and your fingers "curl" in the direction of the magnetic field
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