Rotor induced emf is maximum when slip is --

Related MCQs

• A 3 phase indution motor is running with slip of 4% hving synchronous speed of 1500rpm. If rotor induced emf per phase in standstill condition is 115.47V and rotor impedance in standstill condition is 0.1+j1 Ω then torque developed ia____.
• At any given slip s the rotor induced emf (E2r) is ----
• frequency( fr) of induced emf in rotor of I.M. is given by --
• When load is connected to three phase induction motor is increased, then its rotor induced emf
• A 4 pole, 50Hz induction motor runs at a speed of 1440rpm. The frequency of the rotor induced emf is _____.
• The rotor standstill resistance and reactance of an induction motor are 0.5Ω and 2.5Ω hence the rotor impedance at 5% slip is____.
• A 3 phase induction motor is running with 4% slip. Its rotor input is 10kW then rotor copper losses are
• A 3 phase I.M. is running with 5% slip. Its rotor input is 20kW then its rotor efficiency is ____.
• A 25kW, 3 phase I.M. is running with 6% slip. Its rotor resistance per phase is____ if frictional losses are 850W and rotor current per phase is 65A.
• A 4 pole DC generator rotates at 1500 rpm. How many times in a second, will the emf induced in each armature conductor changes its direction?