4.2 Electric forces

Question 1

How would a comb rubbed with a piece of cloth pick up pieces of paper

Answer 1

The plastic comb becomes negatively charged, and this negative charge repels the electrons in each piece of paper, causing the pieces of paper to become positively charged. the opposite charges now attract so the paper accelerates towards the comb

Question 2

What is the equation for electric field strength

Answer 2

electric field strength = electric force/ charge

E = F/Q