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Question 1

what is a thermoelectric cell?

Answer 1

thermocouples combined to produce greater amounts of electricity

Question 2

what is a photovoltaic cell?

Answer 2

used to produce electricity from light (usually composed of silicon)

Question 3

what are electrodes?

Answer 3

different types of metal in a voltaic cell that have different attractions for electrons

Question 4

what is an electrolyte?

Answer 4

a substance that conducts an electric current through movements of ions

Question 5

piezoelectric effect??

Answer 5

converting electric current into motion and then sound

ex. singing birthday cards

Question 6

reverse piezoelectric effect??

Answer 6

motion into electricity and then heat

ex. bbq lighter

Question 7

how does a photovoltaic cell work?

Answer 7

converts light into electricity, light is absorbed by a silicon material allowing the electrons to break loose and flow
ex. solar panels

Question 8

how is electricity created in an electrochemical cell?

Answer 8

one of the electrons breaks down into ions allowing the electrolyte to conduct electrical energy

Question 9

primary cell? secondary cell?

Answer 9

primary= not rechargeable 
secondary= rechargeable

Question 10

what type of cell has the greatest energy per mass??

Answer 10

zinc air cell (smallest in size and weight)

Question 11

main components of a voltaic cell and their function??

Answer 11

electrodes(2)- one gains electrons and one loses them

electrolyte- conducts electricity

Question 12

difference between a battery and a cell??

Answer 12

battery- more than one cell

cell- single voltaic cell

Question 13

how does magnetism create electricity??

Answer 13

magnet pulls electrons through conducting wire which creates and electrical flow

Question 14

what is an electromagnet??

Answer 14

a coil of copper wire and a magnet that produces an electric current

Question 15

two ways an electromagnet can be made stronger??

Answer 15

• more wraps of wire

- increase strength of core material

Question 16

alternating current? direct current?

Answer 16

alternating- flows in 2 directions

direct- flows in one direction

Question 17

how does a DC motor convert electrical energy into mechanical energy??

Answer 17

• current flows into electrical attachments
• creates and electromagnet as it flows through the conducting wire
• attraction and repulsion of the electromagnet and perm magnet create the armature spin

Question 18

what is a thermocouple?

Answer 18

device that converts heat into small amount of electrical energy