Electrical Formulas Quiz

What is the formula for calculating voltage using Ohm's Law?

• V = I × R

• V = P / I

• V = I / R

• V = R / I

Which formula represents the calculation of power?

• P = I × V

• P = V / I

• P = I / R

• P = V × R

Which type of circuit has a minimum live conductor cross-sectional area of 2.5 mm² for copper conductor mineral insulated cables?

• A1 Ring

• A2 Radial

• A3 Radial

• A4 Radial

What should be sought from an electrician according to the document?

• Information

• Tools

• Discounts

• Cable samples

What is the conductor cross-sectional area for reference method 101 at 4 mm²?

• 17

• 22

• 27

• 30

What is the conductor cross-sectional area for reference method B* at 10 mm²?

• 47

• 52

• 57

• 64

What is the recommended cable size for lighting?

• 1.5mm² twin and earth

• 2.5mm² twin and earth

• 6.0mm² twin and earth

• 10.0mm² twin and earth

What is the cable size for a smaller electric shower (7kW)?

• 1.5mm² twin and earth

• 2.5mm² twin and earth

• 6.0mm² twin and earth

• 10.0mm² twin and earth

Which cable size is used for a larger electric shower (11kW)?

• 1.5mm² twin and earth

• 2.5mm² twin and earth

• 6.0mm² twin and earth

• 10.0mm² twin and earth

What might happen to insulation if the temperature is too high?

• It may melt

• It may freeze

• It may expand

• It may shrink