SSC JE Electrical Engineering 2013

Instructions

For the following questions answer them individually

Question 191

The purpose of using dummy coil inDC machine is to

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Question 192

An inductor with a ferromagnetic core is supplied from a sinusoidal voltage source with frequency 'f'. The current drawn by the inductor will be

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Question 193

For a 6-pole DC machine with wave wound armature, the number of brushes required is

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Question 194

Function of interpoles in a DC machine is to

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Question 195

The commutator segments of DC machine are made of

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Question 196

Which one of the following is a speed control method of three phase squirrel cage induction motor?

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Question 197

In the circuit as shown, voltage measured between A, B, is found to be 70 V. Value of M is

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Question 198

Two coupled coills, connected in a series have and equivalent inductance of 16 mH or 8 mH depending on the connection. The mutual inductance between the coil is

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Question 199

Tesla is the unit of

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Question 200

Which one of the following is a valid value of coefficien of coupling between two inductors?

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