Electricity and Circuits Competencies

What are the two types of electrical current?

• Direct and Alternating

• Series and Parallel

• Positive and Negative

• High and Low

Describe the function of the four basic components of an electric circuit?

• The four basic components of an electric circuit are: 1) Power Source - provides energy, 2) Load - consumes energy, 3) Conductors - allow current flow, 4) Switch - controls current flow.
• Power Source - stores energy
• Switch - increases current flow
• Load - generates energy

Describe the function of an electrical schematic?

• To serve as a blueprint for constructing physical buildings.
• To provide a detailed explanation of electrical theory.
• The function of an electrical schematic is to provide a clear and organized representation of an electrical circuit's components and their interconnections.
• To measure the voltage in a circuit.

Describe the operation of a manual switch that controls NO and NC contacts?

• A manual switch does not affect NO or NC contacts when activated.
• A manual switch controls NO contacts by closing them when activated and NC contacts by opening them when activated.
• A manual switch controls both NO and NC contacts by closing them simultaneously.
• A manual switch only controls NO contacts by opening them when activated.

Describe the function of a switch that controls an output device?

• A switch controls an output device by completing or breaking an electrical circuit to turn it on or off.
• A switch stores energy for an output device.
• A switch amplifies the signal of an output device.
• A switch regulates the temperature of an output device.

Describe the function of a schematic symbol in an electric circuit.

• To represent the physical layout

• To indicate the type of current

• To show the function of a component

• To measure voltage.

Define voltage and give its units of measurement.

• A) Voltage is the flow of electric charge, measured in amperes.

• B) Voltage is the potential difference, measured in volts.

• C) Voltage is the resistance to current, measured in ohms.

• D) Voltage is the power used, measured in watts.

Describe how a voltage drop is measured in a series and parallel circuit.

• Using a voltmeter across each component

• Using an ammeter in series

• Using a resistor in parallel

• Using a capacitor in series

State a formula for calculating the total power used in a parallel circuit.

• P = V/I

• P = VI

• P = I^2R

• P = V^2/R

Define inductance and give its units of measurement.

• Inductance is the ability to store charge, measured in farads.

• Inductance is the opposition to current change, measured in henrys.

• Inductance is the flow of electric charge, measured in amperes.

• Inductance is the potential difference, measured in volts.