Strength of the external magnetic field
The mass of the conductor
The length of the conductor in the field
The angle the conductor makes with the external magnetic field.

Like currents attract
Unlike currents repel
The force is shared between the conductors proportionally to their relative lengths
The force is proportional to the inverse of the distance between them.

Armature
Rotor
Brushes
Split-ring commutator

Permanent Magnets
Static Electricity
Current Carrying Coils
Electromagnet

The magnetic field in a galvanometer is radial
The needle rotates until the magnetic force is equalled by a counterbalancing spring
The loops of wire in a galvanometer are connected in parallel
An iron core increases the magnitude of the magnetic force

The voice coil is physically attached to the magnets
Both magnets are a square shape
The voice coil vibrates side to side as a result of the motor effect
The voice coil is connected to the output of an amplifier

Magnetic Flux
Magnetic Flux Density
EMF
Teslas

Lenz's Law
Faraday's Law of Induction
Tesla's AC Theory
Einstein's theory of special relativity

Back EMF
EMF
Eddy Current
Rotational Kinetic Energy

Electrical to Kinetic Energy
Rotational Kinetic Energy to Electrical Energy
Rotational Kinetic Energy to an Induced EMF
Heat to Electrical Energy

Using superconducting wire for transmission
Decreasing the current
Increasing the voltage
Changing the material used for transmission

DC generators need to be located close to towns because of the huge losses in transmission
AC electricity can be transformed
DC generators were patented by the Edison General Electric Company
AC generators have a slightly simpler design

Thomas Edison
Nikola Tesla
Westinghouse
Michael Faraday

Earth Linkage
Transmission Line
Suspension Insulator
On-line Transformer

The current in the secondary coil is larger than that in the primary coil
The output voltage is smaller than the input voltage
The output power is greater than the input power
None of the above

Television
Mobile Phone Charger
Christmas Lights
Air Conditioner

They are cheaper
They are good transmitters of magnetic flux but poor conductors of electricity
They reduce the amount of heat produced
They are not actually used in transformers

Lightbulb
Torch
Christmas Lights
None of the above

Insulators in transformers reduce loss due to heat
Nikola Tesla once worked for the Edison General Electric Company
Westinghouse argued with Edison over whether AC or DC electricity was best
All of the above

The mass of the transformer
The distance between the primary and secondary coils
The type of core used
All of these affect the performance of a transformer