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DC Machines and Energy Conversion Quiz
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DC Machines and Energy Conversion Quiz

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Questions and Answers

What is dynamically induced e.m.f.?

It is e.m.f. due to physical movement of the coil or conductor with respect to flux or movement of flux with respect to coil or conductor.

What is the purpose of connecting a large number of conductors together in a specified manner in a D.C. machine?

To have a large voltage at the output.

What is the winding called that is formed by connecting a large number of conductors together in a specified manner in a D.C. machine?

Armature winding.

What is the external device used to rotate the conductors placed in the armature of a D.C. machine?

<p>Prime movers such as diesel engine, steam engine, or steam turbines.</p> Signup and view all the answers

What is the process called when an electrical machine transfers energy from mechanical to electrical form or vice versa?

<p>Electromechanical energy conversion</p> Signup and view all the answers

What is the name of an electrical machine that converts mechanical energy into electrical energy?

<p>Electric generator</p> Signup and view all the answers

What is the name of an electrical machine that converts electrical energy into mechanical energy?

<p>Electric motor</p> Signup and view all the answers

What principle do all generators work on?

<p>Dynamically induced e.m.f</p> Signup and view all the answers

According to Faraday's law of electromagnetic induction, what happens when the number of magnetic lines of force linking with a conductor or a coil changes?

<p>An electromotive force is set up in that conductor or coil</p> Signup and view all the answers

What is the mathematical expression for the magnitude of the induced e.m.f in a conductor?

<p>e α 𝐝𝛗 𝐝𝐭</p> Signup and view all the answers

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