Electricity

Question 1

The accumulation of excess electric charge on an object.

Answer 1

Static electricity

Question 2

Charge can be transferred from object to object, but it cannot be created or destroyed. Whenever an object becomes charged, electric charges have moved from one place to another.

Answer 2

Law of Conservation of Change

Question 3

A material in which electrons are able to move easily.

Answer 3

Conductor

Question 4

A material in which electrons are not able to move. They are held tightly to atoms in insulators.

Answer 4

Insulator

Question 5

The process of transferring charge by touching or rubbing.

Answer 5

Charging by contact

Question 6

The rearrangement of electrons on a neutral object caused by a nearby charged object.

Answer 6

Charging by induction

Question 7

The net movement of electric charges in a single direction.

Answer 7

Electric current

Question 8

Related to the force that causes electric charges to flow. Voltage difference in measured in volts.

Answer 8

Voltage difference

Question 9

A closed path that electric current follows.

Answer 9

Circuit

Question 10

The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.

Answer 10

Resistance

Question 11

The current in a circuit equals the voltage difference divided by the resistance.

Answer 11

Ohm’s Law

Question 12

The current has only one loop to flow through. They are used in flashlights and holiday lights.

Answer 12

Series circuit

Question 13

Contains two or more branches for current to move through. The current can flow through both or either of the branches.

Answer 13

Parallel Circuit

Question 14

The rate at which electrical energy is converted to another form of energy.

Answer 14

Electric Power

Question 15

Contains two connected plates made of different metals or metallic compounds in a conducting solution.

Answer 15

Wet-cell battery

Question 16

Consists of two electrodes surrounded by a material called an electrolyte. It is called that because the electrolyte is a moist paste, and not a liquid solution.

Answer 16

Dry-cell battery

Question 17

Contains a small piece of metal that melts if the current becomes too high. When it melts it causes a break in the circuit, stopping the flow of current through a loaded circuit.

Answer 17

Fuse

Question 18

A device that prevents a circuit from overheating and causing a fire. It contains a piece of metal that bends when the current is so large that it gets hot.

Answer 18

Circuit breaker

Question 19

the SI unit of power, which is equivalent to one joule per second, corresponding to the power in a electric circuit in which the potential difference is one volt and the current one ampere. Work performed by electricity.

Answer 19

Watts

Question 20

Measure current

Answer 20

Amperes