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NUE 054 Practice Test No. 1 Answers

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
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