2.1 - Electric fields and resistors in circuits

Question 0

What is the e.m.f of a source?

Answer 0

The electrical potential energy supplied to each coulomb of charge which passes through the source

Question 1

What is potential difference

Answer 1

A measure of the work done in moving one coulomb of charge between two points

Question 2

What are the variations of the formula E=V + Ir? (5)

Answer 2

• E = V + v
• v = Ir
• E = Ir + IR
• r = v/I
• r = E-V/I

Question 4

What is the potential divider equation?

Answer 4

V2 = (R2/R1 + R2)Vs

Question 5

What happens to an electric charge in an electric field?

Answer 5

In an electric field, an electric charge experiences a force

Question 6

What happens when an electric field is applied to a conductor?

Answer 6

An electric field applied to a conductor causes the free electric charges in it to move

Question 7

What is the relationship between the out-of-balance voltage of a wheatsonte bridge and the resistance?

Answer 7

Directly proportional (i.e. positive and negative line through the origin)