List of top Electrical Circuits and Machines Questions

In a 3-Φ Induction motor connected to a balanced 3-Φ supply, if one of the lines suddenly gets disconnected, then the:
A. Motor will come to a standstill.
B. Motor will continue to run at the same speed with line current unchanged.
C. Motor will continue to run at a slightly reduced speed with increased line current.
D. Rotor currents will have both sf and (2-s)f components frequencies where s is slip and f is the supply frequency.
Choose the correct answer from the options given below:

Skewing is used in Induction motor in order to reduce the torque due to:

The short circuit admittance matrix of a two port network is \(\left[\begin{matrix}   0 & \frac{-1}{2} \\   \frac{1}{2} & 0  \end{matrix}\right]\). The given two port network is.

A 50 KVA 1- phase transformer has a full load efficiency of 95% at unity power factor and core loss is a 0 Watt. find the efficiency at 75% of full load and 0.8 power factor lag

if current passing through g is 0, then find \(R_X\)

Consider a unity bad back system with open loop Pole zero location given in circuit. it's R.L Cut the imaginary axis at \(s=jα (α>0)\)what is the value of \(α\).

Find dV/dt

Two Inductors are connected in series adding condition resultant is 500 MH & series opposition is 300 MH. Both inductors are equal then find coefficient of coupling?

A 3- phase squirrel cage induction motor has a starting torque of 100% of full load torque and maximum torque of 300% of full load for torque neglect stator impedances the slip at maximum torque is _____%