Electrical Systems Flashcards
(39 cards)
To have a continuous flow of electricity what three conditions must be present?
- An EXCESS of electrons in one place
- A LACK of electrons in another place
- A path between the two places
In simple terms what is Magnetism?
The controlled movement of electrons
An automotive battery is a source of what type of energy and how does it create energy
Chemical Energy from a reaction in the battery providing an excess of electrons in one place and and a lack of electrons in another place
Moving a wire (conductor), through an already existing magnetic field (permanent magnet) can produce electricity and is referred to as:
Induction
During induction the amount of electricity produced depends on what three conditions?
- the strength of the magnetic field
- the number of wires that are passed by the magnetic field
- the speed in which the magnetic field moves past the wires
What are the 5 common ways electricity can be produced
- Magnetism
- Chemical
- Photoelectrical
- Thermoelectrical
- Piezoelectrical
Electrical current describes:
The movement or flow of electricity
The greater the number of electrons flowing past a given point in a given amount of time:
The more current the circuit has
______________ is electrical pressure
Voltage
Electromotive force is measured in what unit?
Volts
How can the resistance to electrical flow be measured?
Resistance creates heat, heat can be measured to determine the amount of resistance and the unit to measure this is OHMS
A completed circuit is referred to as:
Closed Circuit
An incomplete circuit is referred to as:
And open circuit
If Voltage remains constant, as circuit resistance goes up:
Current goes down
If Voltage remains constant, as circuit resistance goes down:
Current will go up
Describe Voltage drop
The energy used to allow current to flow through a load
Power is the rate of doing electrical work and is expressed with what unit
Watts
One watt is equal to:
One Volt multiplied by one amp
Describe Current Flow
A movement from higher potential to lower potential
E = I / R
What does “E” represent?
voltage (electromotive force)
Which type of resistor is commonly used in automotive circuits?
Fixed value
Which unit measures electrical current
Amperes (amps)
What’s the purpose of using an iron core at the centre of an electromagnetic?
It has decreased reluctance
In a series circuit the current is always the ____________
Same throughout the circuit
