Potential Difference

Question 1

Define potential difference (voltage).

Answer 1

The work done per unit positive charge.

Question 2

What is required to separate negative and positive charges?

Answer 2

A force is required

Question 3

How is energy transferred from an object?

Answer 3

When force is applied to an object over a distance.

Question 4

How do electrons flow?

Answer 4

Electrons flow from a region of low potential to a region of high potential.

Question 5

A region with fewer electrons represent a HIGHER or LOWER potential?

Answer 5

Higher potential - high potential is the region with less electrons. (That’s why electrons flow from negative to positive ~they are going from a low potential to a high potential~)

Question 6

What is the formula to finding potential difference (voltage)?

Answer 6

V = W/Q

Question 7

Give the names and units to the following symbols;
1] V
2] W
3] Q

Answer 7

1] POTENTIAL DIFFERENCE/ VOLTAGE - measured in volts (v)
2] WORK DONE - measured in joules (J)
3] CHARGE - measure in coulombs (c)

1 volt = 1J.C^-1