emf and potential difference

Question 1

What is the lines in a electric field called?

Answer 1

lines of electric flux

Question 2

What are the forms converted from energy?

Answer 2

• heat
• light
• kinetic energy (motion)

Question 3

What is electricity?

Answer 3

the movement of negative charged electrons moving

Question 4

How can electricity be moved?

Answer 4

by a source of electrical energy such as a battery or power supply that has a positive side and a negitive side

Question 5

what does this process provide EMF?

Answer 5

to drive around electrons in a circuit with the EMF

Question 6

What is the equation for EMF?

Answer 6

E = Q x EMF

Question 7

What does E stand for?

Answer 7

• energy in joules
• unit = J

Question 8

What does Q stand for?

Answer 8

• charge in coulombs
• unit = C

Question 9

What does EMF stand for?

Answer 9

• in volts (electromotive force)
• unit = V

Question 10

What are two types of cells?

Answer 10

• primary
• secondary

Question 11

What is a primary cell?

Answer 11

a cell that can only be used once

Question 12

What is a secondary cell?

Answer 12

a cell that can be used more than once (recharged)

Question 13

give examples of primary and secondary cell

Answer 13

• A primary cell, like a battery, is used for devices that will only run/work with primary cells. Which battery would gradually lose its charge
• A secondary cell, like a power bank, will be used to charge other devices like a phone. Though the cell will lose charge, it can also be recharged.