A transformer operates on the principle of___

The material used for the construction of the transformer core is ___.

The ___ in a transformer acts as an insulator as well as coolant.

The cylindrical windings are used for ___ transformer.

For the ___ type transformer the primary and secondary windings are placed on the central limb of the core.

The ___ type of transformer provides double magnetic circuit.

If the primary voltage is 230 V, 50 Hz, N₁ = 500 and Bₘ = 0.4144 T then the cross-sectional area of the core is ___.

The voltage ratio of a transformer is defined as the ratio of ___.

The ratio N₂/N₁ of a transformer is called as ___ ratio.

The transformer with ___ is called as a step-up transformer.

The transformer with K > 1 is called as ___ transformer

The transformer with K < 1 is called as ___ transformer

The primary and secondary currents are ___ to the number of turns of the corresponding windings.

The transformer rating is in terms of ___.

The complete ratings of a transformer include the ratio of primary and secondary voltages ___ and ___.

The transformer rating is stated in VA or kVA because at the time of manufacturing the ___ is not known.

A 3300/220 V transformer has rated primary and secondary currents of ( 30.303 ) A and ( 500 ) A respectively. Its rating would be ___.

For a 6600/220 V, 50Hz transformer, if N₁ is equal to 1500 and B_m is equal to 1.2T the effective cross sectional area of the core is A = ___

The total loss in a transformer is the sum of ___ loss and ___ loss.

The ___ loss is further classified into hysteresis loss and eddy current loss.

If the copper loss at full load is 200 W then that at half load will be ___.

___ loss is independent of frequency.

The hysteresis loss is a part of ___.

The hysteresis loss is proportional to ___.

The ___ loss taking place in the core of the transformer.

A DC motor converts ___ into ___.

In a DC motor, the field winding is connected to a ___ supply and the armature winding is connected to ___ supply.

In Fleming's left-hand rule, the thumb indicates ___.

Voltage induced in armature winding of a DC motor is called as ___.

When a current-carrying conductor is placed in a magnetic field, it experiences a ___.

The ___ motor is also called as the constant flux motors.

For a DC shunt motor, the total current drawn from the source is given by:

In DC ___ motor, the flux ( \Phi ) will not be constant.

If we start a DC series motor on no load, then it may get damaged due to ___.

DC series motor produces torque ___ DC shunt motor.

DC shunt motor requires ___ point starter.

In ___ motor, the shunt field winding is connected across the series combination of armature and series field windings.

If the two field windings (series and shunt) are wound in such a way that the fluxes produced by them always add or assist each other, then the type of compound motor is called ___:

The motor which can operate on ac as well as dc supply is ______ motor.

Universal motor uses ______ windings.

All the windings in a universal motor are connected in ______.

______ motor is inherently discrete motor.

A stepper motor is basically an ______.

P.M motors have ______ power requirements.

State true/false: The step size of P.M motor is relatively large.

Advantage of variable reluctance motor is ______.

In ______ motor, rotor is magnetized.

Dynamic response of V.R motor is ______ as compared to P.M motor.

Maximum stepping rate of V.R motor is ______.

______ motor operates on the combined principle of permanent magnet and variable reluctance step motors.

Stepper motors are used in ______.

Step angle of hybrid stepper motor is ______.

Limitation of stepper motor is _______.

The step angle for a single stack variable reluctance stepper motor is given by

In ___ motor, the armature and shunt field windings are connected in parallel with each other, and their parallel combination is then connected in series with the series field winding

___ motor is never started on no load.

In DC ___ motor, phi is directly proportional to I_a

Voltage induced in armature winding of a DC motor is called as ___.

The ___ loss is known as the constant loss.