If Bmax is the maximum flux density, then addy current loss will vary as

The type of DC motor used for shears and punches is

In a DC generator the critical resistance to the resistance of

In case of DC machines, mechanical losses are primary function of

For both lap and wave windings, there are as many commulator bars as the number of

The insulting material used between the comutator segment is normally

Which of the following losses are significantly reduced by laminating the core of a DC generator

It is a DC motor that tends to over speed when the field opened while running

Which DC motor will be suitable along with flywheel for intermittent light and heavy loads?

In a DC generator the critical resistance refers to the resistance of

The series field of a short-shunt DC generator is excited by

The number of armature parallel in two pole DC Generator having duplex lap

These day DC motor are widely used in

Drop speed of a DC generator due to increase in load can be compensated by

In a DC machine stray loss is the sum of

Which one of the following generators is used for charging batteries?

If the armature of an eight-pole dc machine were wound with a simplex wave winding, how many parallel paths would there be?

By looking p at which part of the shunt motor, it can be easily confirmed that a particular motor is DC Motor

Which DC motor will have keast percentage increase of input current p, for the same percentage increase in the toque

In an overload motor main danger arises due to

If residual magnetism of a shunt generator is destroyed accidentally, it may be restored by connecting its shunt field

The number of armature parallel paths in two pole DC Generator having duplex winding is

Whem the shunt field of a compound generator is connected across both series field and armature.suah a connection is known as

The hysteresis loss in DC generator with the frequency of magnetic reversals as

In case of DC machine winding, number of commutater segment is equal to

For a DC Generator when the number of poles and the number of armature conductors is fixed, then which winding will give higher emf?

The ratic of starting torque to full-load torque is least in case of

Differentially compound DC motors can find applications requiring

No-load speed of which of the following motor will be highest?

A shearing machine has cyclic load consisting of intrpermittent ligth and heavy loads. Which of the following DC motor suitable for this purpose?

A DC series motor, as compared to shunt and compound motors, has the highest torque at the start because if its comparatively

If a speed of a DC shunt motor is increased, the back emf of the motor will

the field of DC generators are usually made of

Which of the following components of DC generator plays vital role for providing direct current of a DC Generator

A DC shunt motor is rotating in clockwise direction as viewee from one end. The polarity of connection of the armature and field winding are reversed simultaneously. The motor will

In which of the following application DC series motor is invariably used?

A series motor is best suited for driving

In a DC generator in order to reduce sparking at brushes p,the self-induced emf in the coil is neutralized by all of the following except

Which DC Motor will be preffered for elevators

The direction of rotation of a dc motor is reversed by

The bearings used to support the rotor shatfs are geneally

In over compound generato, full load terminal voltage is

Which of the following loss in a DC generator varies significantly with the load current?

Lamination of core are generally made of

Brushes of DC machine are made of

If the current in the armature of dc series is reduced to 50% the torque of the motor will become

The purpose providing dummy coils in a generator is

Which of the following statement is correct in case of a DC Series Motor

For generating large current on DC generators which winding is generally preferred?

The direction of rotation of a DC series motor can be changed by

Which DC motor will be preferred for constant speeed line shafting?

Interpoles are connected _____ with the armature and compensating windings are connecties in _____ with the armature

One dc motor drives another de motor. The second dc motor when excited and driven

As the load is increased the speed of DC shunt motor will

A DC generetor works on the principle of

In DC generators, lap winding is used for

If a DC motor is to be selected for conveyors, which motor would be preferred

In case of DC machine winding,number of commutator segmentis equal to

DC shunt motors are used for driving

Welding generator will have