Question
Number

Answers
 Key to symbols: x = multiply, 32 =
to the power of, / = divide

Q1

R = V / I
= 230 / 15 = 15.33 Ohms

Q2

I = V / R
= 230 / 60 = 3.83 Amps

Q3

V = I x R
= 25 x 12 = 300 Volts

Q4

I = V / R
= 200 / 400 = 0.5 Amps

Q5

V = I x R
= 3 x 60 = 180 volts
And
P = V x I = 180 x 3 = 540 Watts
Or
P = I2R = 32 x 60
= 540 Watts

Q6

P = V x I
= 230 x 7 = 1610 Watts

Q7

V = P / I
= 4500 / 10 = 450 Volts
And
R = V / I = 450 / 10 = 45 Ohms
Or
R = P / I2 = 4500 / 102
= 45 Ohms

Q8

Diagram 3

Q9 
Current is directly
proportional to voltage 
Q10 
High resistance causes
low current 
Q11 
Current flow is the
movement of electrons 
Q12 
Current is inversely
proportional to resistance 