Jake Amos Electricity

Question 1

Active wire

Answer 1

A circuit wire connected to the 240v rms supply at the switch board

Question 2

Alternating current

Answer 2

Refers to circuits where the charge carriers move backwards than fowards periodically

Question 3

Ammeter

Answer 3

A device used to measure current

Question 4

Ampere

Answer 4

The unit of current

Question 5

Battery

Answer 5

Consists of 2 or more cells joined together and used as a single unit it has two terminals

Question 6

Capacity

Answer 6

The capacity of a battery provides a measure of the time for which a battery can supply a fixed current

Question 7

Circuit

Answer 7

An electrical circuit is a complete conducting psthway

Question 8

Charge carrier

Answer 8

A charge particle moving in a conducting Pathway

Question 9

Closed circuit

Answer 9

A circuit in which the conductors form a continuous path through which a current can circulate

Question 10

Circuit breaker

Answer 10

Carriers out the same function as fuse by breaking the circuit when a current exceeds a certain value

Question 11

Conventional current

Answer 11

The movement of positive charges from the positive terminal of a cell through the conductor to the negstive terminal

Question 12

Direct current

Answer 12

DC refers to circuits where the net flow of charge is in one direction only

Question 13

Earth wire

Answer 13

Wire used in power circuits as a safety device it connects the case of the appliance being used to the earth

Question 14

Efficiency

Answer 14

A measure of the ability to convert an energy input into a useful energy output

Question 15

Electric charge

Answer 15

A basic property of matter it occurs in two states positive charge and negative charge

Question 16

Electric current

Answer 16

The movement of charged particles from one place to another

Question 17

Electric insulator

Answer 17

In an electric insulator the electrons are bound tightly to the nucleus and are not free to travel through the the material

Question 18

Electric shock

Answer 18

A violent disturbance of the nervous system caused by an electric discharge or current flowing through the body

Question 19

Electric potential energy

Answer 19

Measures in joules the potential energy of a charge carriers due to their position in the circuit

Question 20

Electrocution

Answer 20

Death brought by electric shock

Question 21

Electron

Answer 21

A negatively charged particle found around the nucleus of an atom

Question 22

Electron current

Answer 22

The term used when dealing with the mechanisms for the movement of electrons

Question 23

Electron volt

Answer 23

EV a unit used to measure small amounts of energy

Question 24

Hydro electrity

Answer 24

Electrical energy generated from turbines that are turned by the kinetic energy of flowing water

Question 25

Internal resistance

Answer 25

Internal resistance of the source of emf is the resistance associated with it because it forms part of the du function path

Question 26

Neutral wire

Answer 26

In a circuit wire connected to the wire connected to the neutral link at a switch board which is connected to the earth

Question 27

Non-ohmic device

Answer 27

A device which the resistance is diferent for different currents passing through it

Question 28

Nuclear energy

Answer 28

The energy emitted by a nucleus as it becomes more stabld

Question 29

Ohmic device

Answer 29

A device for which under constant physical condition such as temperature the resistance is constant for all currents that pass through it

Question 30

Open circuit

Answer 30

In which their is a break in the path so that the current canot flow

Question 31

Coulomb

Answer 31

The unit of electric charge

Question 32

Conductor

Answer 32

In an electric circuit the conductor can be the wire connecting the circuit elements

Question 33

Load

Answer 33

A device where electric potential energy is converted into other forms of energy to perform a task such as heating or lighting

Question 34

Switch

Answer 34

Stops or allows the flow of electricity through a circuit

Question 35

Potential difference

Answer 35

See voltage drop

Question 36

Power

Answer 36

The rate of doing work or the rate at which energy is transferred or transformed it is measured in watts

Question 37

Neutron

Answer 37

A nucleon with no charge

Question 38

Proton

Answer 38

A positively charged particle in the nucleus of an ato,

Question 39

Resistor

Answer 39

Used to control the current flowing through and the voltage drop across parts of a circuit

Question 40

Series

Answer 40

Devices joined together one after another