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Electrical Science Objectives
Electrical Science Objectives
23
Electrical Engineering
Post-Graduate
06/10/2012

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Cards

Term
Describe Potential Difference
Definition
Potential difference is how large the electrostatic force is between two charged objects
Term
Conductor
Definition
A material that easily allows the flow of electricity
Term
Insulator
Definition
A material that restricts the flow of electricity
Term
Resistor
Definition
A material that slows current flow
Term
DC Current
Definition
A current flow that is continuous in the same direction
Term
AC Current
Definition
A current flow that periodically reverses direction
Term
Voltage
Definition
The basic unit of measure for potential difference. The pressure or force that causes electrons to move in a conductor. Also called EMF
Term
Current
Definition
The movement or flow of electrons. Also called electron current flow
Term
Resistance
Definition
The opposition to current flow
Term
Power
Definition
The rate at which work is done, or the rate at which heat is generated
Term
Capacitance
Definition
The ability to store an electric charge
Term
Static Electricity
Definition
Electrons removed from atoms due to friction creating a potential difference
Term
Magnetic Induction
Definition
The process of moving a conductor through a magnetic field to produce a potential difference
Term
List four ways to produce DC Voltage
Definition

1. Batteries

2. DC Motor

3. DC Generator

4. Rectifier

Term
Resistivity
Definition
The measure of resistance a material imposes on current flow
Term
Closed Circuit
Definition
When the path for current flow is existent
Term
Open Circuit
Definition
When the path for current flow is broken or non-existent
Term
Short Circuit
Definition
A sudden and very large increase in circuit current associated with a zero or very low resistance current path
Term
Series Circuit
Definition
A circuit where there is only one path for current flow
Term
Parallel Circuit
Definition
Circuits that have two or more components connected across the same voltage plant
Term
List Three Requirements For Producing An EMF
Definition

1. Relative Motion

2. Magnetic Field

3. A Conductor

Term
State The Purpose Of A Battery
Definition
Is to store chemical energy and convert the chemical energy into electrical energy when needed
Term
Explain the adverse affects of a shorted cell
Definition
Is that it causes a great reduction in battery capacity
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