## 81. The low power factor of induction motor is due to

## 82. The injected e.m.f. in the rotor of induction motor must have

## 83. If any two phases for an induction motor are interchanged

## 84. Slip of an induction motor is negative when

## 85. The torque developed by a 3-phase induction motor least depends on

## 86. The good power factor of an induction motor can be achieved if the average flux density in the air gap is

## 87. The rotor of an induction motor runs at

## 88. In N_{s} is the synchronous speed and s the slip, then actual running speed of an induction motor will be

_{s}is the synchronous speed and s the slip, then actual running speed of an induction motor will be