Electrical Science revision

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

Rearrange the following formula to make ‘c’ the subject:
a² = b² + c²

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The SI unit m² is used for what measurement?

• Volume

• Mean area

• Area

• Mass

What are the SI base units for volume and temperature?

• m³ , ^oC

• m³ , ^oK

• m² , ^oC

• m² , ^oK

Which instrument would be used to measure Power? 

• Ohm meter

• Volt meter

• Watt meter

• Amp meter

Instrument B in the circuit shown would measure:

• the voltage across R₁

• the current through R₃

• the current through R₁

• the voltage across R₃.

An industrial motor has a mass of 500kg at sea level. What is the mass of the motor when it is taken 1000m above sea level?

• 5000kg

• 4.9kN

• 5000N

• 500kg

A wheel barrow is an example of a:

• Class 1 lever

• Class 2 lever

• Class 3 lever

• Class 4 lever

The power required to raise a mass of 8kg across a distance of 10m in 40 seconds is approximately:

• 785W

• 80W

• 20W

• 5W

Which one of the following correctly defines force?

• It is the effect of gravity on a mass measured in Newtons

• It is the effect of distance on gravity measured in metres per second

• It is the effect of distance on mass measured in coulombs.

• It is the effect of weight over time measured in watts