13. Electric Charge and Current Electricity

Question 1

Like charges repel or attract?

Answer 1

repel

Question 2

Define electric current

Answer 2

Rate of flow of electric charge
Current=charge/time

Question 3

What are the 2 types of electric current?

Answer 3

1) Convectional current where it follows the flow of positive charges 2) Electric flow where is follows the flow of negative charges

Question 4

difference between emf and potential differences

Answer 4

1. emf runs throughout the whole circuit while pd run through a component
2. Emf is present without current, no pd is present when current is not present

Question 5

similarity of emf and pd

Answer 5

same formula:
E/V= work done/ charge

Question 6

Define resistance

Answer 6

ratio of pd across the current
R=volt/charge