Write down and expression for the e.m.f generated by a dynamo and use it to identify the factors which determine the maximum e.m.f.

Write down and expression for the e.m.f generated by a dynamo and use it to identify the factors which determine the maximum e.m.f.

Induced e.m.f , E = 2πfμABsin2πft

Maximum e.m.f, E₀ = 2πfμAB

Maximum e.m.f thus increases with increase in

• Frequency or angular velocity
• Number of turns of the coil
• Magnetic flux density

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