Efficiency and energy resources

EasyMedium
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354
Question 7
Easy

Figure 1 shows the energy transfer diagram for an electric motor.

Energy transfer diagram for an electric motor. A large arrow on the left represents the energy supplied to the motor, labeled 'Total energy input: 800 J'. This splits into two output arrows. The top arrow is a straight horizontal arrow pointing to the right, labeled 'Useful kinetic energy output: 360 J'. The bottom arrow curves downwards, representing wasted energy, and is labeled 'Wasted thermal energy output: 440 J'.

Calculate the efficiency of the electric motor.

Use the equation:

efficiency=useful energy transferredtotal energy supplied \text{efficiency} = \frac{\text{useful energy transferred}}{\text{total energy supplied}} efficiency=total energy supplieduseful energy transferred​
[2]

Efficiency and energy resources Questions

  1. GCSE
  2. /Physics
  3. /Efficiency and energy resources