| Question No. |
Answers - key to symbols: x = multiply, 2 = 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 |
