Mathematics Quiz

13m of a 50m drum of cable is used. What is the percentage left on the drum?

• 26%

• 50%

• 74%

• 13%

Make resistivity the subject of the formula, $ R = \frac{\rho L}{A} $.

• $ \rho = \frac{RA}{L} $

• $ R = \frac{AL}{\rho} $

• $ R = \frac{\rho L}{A} $

• $ \rho = \frac{L}{RA} $

What is the value of the resistance, R, in the triangle below?

• 7Ω

• 5.3Ω

• 3.8Ω

• 6Ω

What is the angle, θ, in the triangle shown below?

• 27.28°

• 8.91°

• 58.96°

• 62.71°

An ohmmeter takes five readings on a circuit: 0.24Ω, 0.79Ω, 0.26Ω, 0.35Ω, 0.56Ω. What is the ‘range’ of the readings?

• 0.55Ω

• 0.79Ω

• 0.24Ω

• 2.16Ω

What is the volume of a room that measures, 6m long by 3.9m wide and is 250cm high?

• 12.4m³

• 23.4m²

• 23.4m³

• 58.5m³

Convert 2½ minutes into the correct base unit.

• 2 minutes, 30 seconds

• 1/24th of an hour

• 150s

• 170s

What is the symbol for current?

• I

• A

• mA

• Ω

What does EMF stand for?

• Electro-magneto force

• Electro-motive force

• Electron motive force

• Electron magneto force

What is true power?

• kVA

• VA

• kW

• kVAr