Slip rings are usually made of
A. Copper
B. Carbon
C. Phosphor bronze
D. Aluminium
Answer: Option C
A. Copper
B. Carbon
C. Phosphor bronze
D. Aluminium
Answer: Option C
Which is of the following data is required to draw the circle diagram for an induction motor?
A. Block rotor test only
B. No load test only
C. Block rotor test and no-load test
D. Block rotor test, no-load test and stator resistance test
The starting torque of a three phase induction motor can be increased by
A. Increasing slip
B. Increasing current
C. Both (A) and (B)
D. None of the above
Rotor rheostat control method of speed control is used for
A. Squirrel-cage induction motors only
B. Slip ring induction motors only
C. Both (A) and (B)
D. None of the above
Slip rings are made of Hard drawn copper material to remove wear and tear
The term cogging is associated with
Because its speed control is easy.