In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
A) remain unchanged
B) reduce to one-fourth value
C) increase four folds
D) be doubled
Correct Answer:
Verified
Q1: If I2 be the armature current, then
Q3: At the instant of starting when a
Q4: The speed of a D.C. motor can
Q5: Which one of the following is not
Q6: For a D.C. shunt motor if the
Q7: Which motor has the poorest speed control?
A)Differentially
Q8: The plugging gives the
A)zero torque braking
B)smallest torque
Q9: The armature voltage control of D.C. motor
Q10: If a D.C. motor designed for 40°C
Q11: If the terminals of armature of D.C.
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