electricity and magnetism

Question 1

3 ways to charge an object

Answer 1

friction, induction, conduction

Question 2

build up of NON moving charge

Answer 2

static electricity

Question 3

potential energy between electrons in a circuit

Answer 3

voltage

Question 4

flow of electrons through a conductor

Answer 4

current

Question 5

opposes electron flow through a wire

Answer 5

resistance

Question 6

the push behind electrons in a circuit

Answer 6

voltage

Question 7

the speed of electrons flowing in a circuit

Answer 7

current

Question 8

the units for voltage

Answer 8

Volts

Question 9

the units for Resistance

Answer 9

Ohms (horseshoe symbol)

Question 10

the units for current

Answer 10

Amps or A

Question 11

the path that eletrons flow

Answer 11

circuit

Question 12

a path where electrons cannot flow

Answer 12

open circuit

Question 13

a path where electonrs CAN flow easily

Answer 13

closed circuit

Question 14

current that flows in only ONE direction

Answer 14

DC or direct current (as in a battery)

Question 15

current that flows in TWO directions

Answer 15

AC or alternating current (as in a wall outlet)

Question 16

device that stores electrical charge

Answer 16

capacitor

Question 17

example of a capacitor

Answer 17

camera

Question 18

fuse

Answer 18

metal tab that melts when current gets too high (found in older homes to prevent house fires from bad wiring)

Question 19

electromagnetic switch that trips when current gets too high

Answer 19

circuit breaker (found in newer homes to prevent house fires)

Question 20

device that resists the flow of electrons

Answer 20

resistor (examples radios, light bulbs, etc)

Question 21

circuits where electrons have only one path, and if one light is broken the whole circuit shuts down

Answer 21

series circuit (like Xmas lights if one bulb broke electrons stop flowing)

Question 22

circuit with more than one path for electrons to flow. If one light is broken electrons can flow through a different part of the circuit back to the battery

Answer 22

parallel circuit (like our house, if we blow a fuse upstairs, we can still use lights downstairs)

Question 23

battery with a LIQUID electrolyte to create electrictiy

Answer 23

wet cell (Ex. a car battery)

Question 24

battery with a PASTY electrolyate to create electricity

Answer 24

dry cell (Ex. a battery)

Question 25

a combination of two or more cells

Answer 25

battery

Question 26

circuit with devices the SHARE voltage (3 bulbs, each gets 1/3 of the voltage in circuit)

Answer 26

parallel circuit

Question 27

circuit where devices all have the SAME voltage (3 bulbs all have same voltage)

Answer 27

series circuit

Question 28

If there are 3 bulbs in a SERIES circuit what would EACH OF their resistances be?

Answer 28

the same resistance

Question 29

If there are 3 bulbs in a PARALLEL circuit what would EACH OF their resistance be?

Answer 29

1/3 of the total resistance

Question 30

force of attraction or repulsion due to ARRANGEMENT of electrons

Answer 30

magnetism

Question 31

Where is the force the strongest in a magnet

Answer 31

at the poles (ends of the magnet)

Question 32

The Earth's NORTH magnetic pole is actually a SOUTH magnetic pole. True or False

Answer 32

True, because the earth's north magnetic pole attracts the north pole of magnet. Opposite poles attract.

Question 33

North pole of magnet will ATTRACT or REPEL a north pole of another magnet

Answer 33

repel (same poles repel)

Question 34

The north pole of a magnent with ATTRACT or REPEL a south pole of another magnet.

Answer 34

attract (different pole attract)

Question 35

What direction do magnetic field lines go?

Answer 35

from North to South pole

Question 36

Define "DECLINATION"

Answer 36

difference in angle between geographic north and magnetic north (true north on a map, vs the north on a compass)

Question 37

Name 3 magnetic metals

Answer 37

Iron, Nickel and Cobalt (Fe, Ni, Co)

Question 38

Define "magnetic domains"

Answer 38

atoms with parallel magnetic fields (arrows in metal all point the same direction)

Question 39

What does a metal look like if its magnetized? | Think of domains

Answer 39

arrows all point same direction

Question 40

What does a metal look like if not magnetized?

Answer 40

arrows point in different directions

Question 41

Name 3 ways that metals can lose their magnetism

Answer 41

dropping, striking them, heating them

Question 42

In the right hand rule what does the Thumb represent?

Answer 42

direction of current

Question 43

In the right hand rule what do the fingers represent?

Answer 43

the direction of magnetic field

Question 44

What is a coil of wire with current that produces a magnetic field?

Answer 44

solenoid

Question 45

What is a solenoid with an IRON CORE?

Answer 45

electromagnet

Question 46

What 4 things determine amount of electromagnetism?

Answer 46

amount of current number of coils of wire size of core material

Question 47

what is the name of a device that measures current?

Answer 47

galvanometer

Question 48

What machine converts moving parts (energy of motion) to electrical energy?

Answer 48

generator

Question 49

What device changes voltage and current in a wire from high to low?

Answer 49

transformers (reduced voltage from power lines to your house)

Question 50

What type of transformer DECREASES voltage and INCREASES current?

Answer 50

step down transformer

Question 51

What type of transformer INCREASED voltage and DECREASES current?

Answer 51

step up transformer

Question 52

How do we get most of our electricity in the US?

Answer 52

by burning coal

Question 53

How do power plants get energy?

Answer 53

with turbines (big fans)

Question 54

What are other sources of energy?

Answer 54

water, wind, natural gas, nuclear

Question 55

Who is the best mom in the world?

Answer 55

You shouldn't need to check the answer to that! You know it! Uhh...huhhh.that's right...uh..huh...