electricity and magnetism

Question 1

static electricity

Answer 1

A buildup of charges on an object.

Question 2

electricity

Answer 2

A form of energy caused by the movement of electrons.

Question 3

current electricity

Answer 3

flow of electricity in and electronic curcuit

Question 4

conditions for electrons to move along a conductor

Answer 4

must be a complete or unbroken path

Question 4

Insulator

Answer 4

A material that does not conduct heat well

Question 5

Conductor

Answer 5

a material that conducts energy or light eg: gold, copper and steal.

Question 6

circuit

Answer 6

a path for an electrical current to flow around

Question 7

current

Answer 7

A flow of electric charge.

Question 8

diff between series circuit and parallel circuit

Answer 8

series - An electric circuit with only one path through which the current is the same

parallel - A circuit that contains more than one path for current flow. becomes net current

Question 9

charge

Answer 9

a path for an electrical current to flow through

Question 10

ammeter

Answer 10

A device used to measure current in a circuit

Question 10

law of conservation of charge

Answer 10

the total electric charge in an isolated system never changes.

Question 10

amps

Answer 10

what a current is measured in

Question 11

power

Answer 11

the rate at which work is done

Question 11

voltage

Answer 11

measures energy carried by electrons

Question 11

voltmeter

Answer 11

A device used to measure voltage, or electrical potential energy difference

Question 12

how to calculate power

Answer 12

p= volts x current

Question 13

Killowatt-hour

Answer 13

measure of electrical energy

Question 14

how to measure cost of electricity

Answer 14

• multiply devices wattage by hours the appliance is used per day
• divide by 1000
• multiply by kwh rate

eg: 2200Kw hours x 6

= 13,000 Kwh

Question 15

in the event of an electrical accident…

Answer 15

• turn off the power
• don’t touch the person
• call 111

Question 16

magnetic field

Answer 16

area of magnetic force around a magnet

Question 17

magnetic attraction and repolsion

Answer 17

N, S of a magnet are brought together

S,S or N,N of a magnet are distanced

Question 18

what times of materials are magnetic?

Answer 18

iron, nickel, cobalt and steel

Question 19

magnet

Answer 19

any material that attracts or contains iron

Question 20

how to determine the strength of a magnet

Answer 20

magnet pull test

Question 21

how to make a magnet?

Answer 21

• stroke a metal with a magnet in one direction
• strike the metal with a hammer

Question 22

electromagnet

Answer 22

a coil that has a soft iron core and that acts as a magnet when an electric current is in the coil

Question 23

Electricity + Magnetism

Answer 23

An object with a moving charge always has both magnetic and electric fields.

Question 24

factors that affects electromagnet

Answer 24

• number of turns in the coil
• whether core is hard or soft
• strength of current passing through coil

Question 25

uses for electromagnets

Answer 25

headphones, speaker

Question 26

magnetism

Answer 26

force exerted by magnets when they attract or repel each other

Question 27

battery (cell)

Answer 27

provides electrical energy to circuit

Question 28

bulb

Answer 28

converts electrical energy into heat and light