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Fleming's right-hand rule regarding direction of induced e.m.f., correlates


A) magnetic flux, direction of current flow and resultant force
B) magnetic flux, direction of motion and the direction of e.m.f. induced
C) magnetic field strength, induced voltage and current
D) magnetic flux, direction of force and direction of motion of conductor

Correct Answer

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Laminations of core are generally made of


A) case iron
B) carbon
C) silicon steel
D) stainless steel

Correct Answer

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The armature of D.C. generator is laminated to


A) reduce the bulk
B) provide the bulk
C) insulate the core
D) reduce eddy current loss

Correct Answer

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Iron losses in a D.C. machine are independent of variations in


A) speed
B) load
C) voltage
D) speed and voltage

Correct Answer

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In a four-pole D.C. machine


A) all the four poles are north poles
B) alternate poles are north and south
C) all the four poles are south poles
D) two north poles follow two south poles

Correct Answer

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