2.0 Electrical Principles and Technologies

Electricity can be conducted by a gas. A good example of this is neon, which glows...

• purple

• orange-pink

• yellowish-white

• red

Tags

NGSS.MS-PS2-3

These types of conductors have no resistance to electron flow and therefore are considered to be perfect conductors. They are ...

• metallic conductors

• magnetic conductors

• superconductors

• superior conductors

Tags

NGSS.MS-PS2-3

A door can be used as a model to show how difficult it would be for electrons to flow. The door model represents ...

• voltage

• current

• resistance

• amperage

Solutions can also be resistors. The more charged particles in a solution...

• the more molecules it has

• the more resistance it has

• the less resistance it has

• the fewer molecules it has

Tags

NGSS.MS-PS1-2

A lie detector indicates that a person is telling a lie because there is ...

• a decrease in resistance

• an increase in resistance

• no change in conductivity

• a decrease in conductivity

Tags

NGSS.MS-PS2-3

A variable resistor is a control device that allows you to change the resistance in a circuit. It is also called a ...

• rheohm

• rheostat

• thermostat

• thermocouple

Rapids can be used to model amperage, current, voltage and resistance. If the rapids have a large number of very large boulders, it models greater …

• voltage

• current

• amperage

• resistance

A certain condition needs to be met in order to prove the mathematical link between voltage, current and resistance as represented by Ohm's Law. The condition is that ...

• temperature must be constant

• measurement must be accurate

• calculations must be precise

• resistance must be created

Using Ohm's Law ( R = V / I ) calculate how much current is created when a 30 V battery creates the current through a 15 Ω resistor. Use this shortcut formula to solve the problem ...

• O.5 A

• 2 A

• 45 A

• 1.5 A

Voltage is the potential difference across two points. Many electricians refer to the potential difference across a resistor or device as ...

• micrometer

• voltage drop

• resistance

• voltmeter