Electricity and Magnetism

In coal fired thermal power stations, what are the electrostatic precipitators used for?

The size of inter pole are small as compared to main poles. What is the reason?

What is the reason for stationary armature essential in alternators above $5$KVA?

The power developed by salient pole synchronous machine is/are _____.

When the excitation of normally operating unloaded, salient pole synchronous motor suddenly gets disconnected, it continues to run as a _____.

To eliminate the $5th$harmonic in the induced voltages their respective pitch factor angle should be _____.

Shunt generators consists of _____ number of turns and _____ conductors respectively?

A $200$MW capacity generator has a speed regulation of $4\%$ for a frequency drop of $0.05$ Hz. Find the power input supplied by the turbine for maintaining constant frequency?

The essential condition for parallel operation of two D.C generators is that they must have-

Maximum power developed in a cylindrical synchronous machine depends on _____.

Armature flux is.............with respect to main field flux or main field poles?

Which of these types of motor is self starting?

What is the highest possible speed by turbo alternators?

An unexcited single phase synchronous motor is _____.

In salient pole synchronous machine, if direct axis reactance and quadrature axis reactance is equal, then power developed due to reluctance is _____.

For a $3$-phase, $4$ pole, $50$ Hz synchronous motor the frequency, pole number and the frequency are halved. The motor speed will be _____.

To eliminate $5$th harmonic in the induced voltage phase breadth should be _____.

In salient pole synchronous machine, maximum power occurs at a load angle of-

What is/are the necessary conditions for voltage build up in self excited generator?

For which of the following loads, armature reaction is magnetizing in nature?