Electricti

Question 1

What is the formula for Ohm’s Law?

Answer 1

V = I R

Question 2

In what unit is current (I) measured?

Answer 2

Amps

Question 3

What is the formula for electrical power (P)?

Answer 3

P = I V

Question 4

What does the symbol ‘R’ represent in electrical circuits?

Answer 4

Resistance

Question 5

Resistance (R) is measured in what unit?

Answer 5

Ohms

Question 6

What is the formula to calculate energy (E) transferred?

Answer 6

E = Pt

Question 7

What is the formula for charge (Q)?

Answer 7

Q = I t

Question 8

Charge (Q) is measured in what unit?

Answer 8

Coulombs

Question 9

What is required for charge to flow?

Answer 9

A source of Potential Difference

Question 10

What do step-down transformers do?

Answer 10

Decrease voltage

Question 11

What is the purpose of step-up transformers?

Answer 11

Increase voltage

Question 12

What type of current flows in one direction?

Answer 12

Direct Current

Question 13

In series circuits, how is resistance calculated?

Answer 13

R = R1 + R2

Question 14

What happens to current in parallel circuits?

Answer 14

Current is split between branches

Question 15

In parallel circuits, what is the potential difference across each branch?

Answer 15

The same

Question 16

What is the formula for the total resistance in parallel circuits?

Answer 16

(1/R = 1/R1 + 1/R2)

Question 17

What type of current has a direction that continually changes?

Answer 17

Alternating Current

Question 18

What does the equation P = 1/2 R represent?

Answer 18

Power in relation to resistance