Question
Download Solution PDFIn a DC motor back emf is directly proportional to:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe back emf of a dc motor is directly proportional to speed.
Eb ∝ Nϕ
If the speed of a DC motor increases, there will be increase in back emf also.
Current drawn in the DC motor is given by
\({I_a} = \frac{{V - {E_b}}}{{{R_a}}}\)
When the speed of a DC motor increases, emf will get increases and hence the current drawn will get decreases.
Important PointsNumber of poles, flux, and armature conductor are constant hence, speed is the correct answer. Kindly go through it once.
Last updated on Jun 11, 2025
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