# What is the back EMF of the motor?

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What is the back EMF of the motor?

## Related questions

What is the back EMF of a dc motor?

What is back EMF of synchronous motor?

The back emf of synchronous motor depends on?

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The counter e.m.f. of a d.c. motor?

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What is Phase sequence? Draw waveforms of 3 phase emf.

The fractional-pitch used for eliminating 7th harmonic from the emf wave of an alternator is (A) 2/3 (B) 5/6 (C) 7/8 (D) 6/7

List the two types of induced EMF.

The induced emf in the armature of a lap -wound four -pole dc machine having 100 armature conductors rotating at 600 rpm and with 1 Wb flux per pole is  (1) 1000V (2) 100V (3) 600V (4) 10,000V

Explain the term self induced EMF with a neat diagram.

If the back emf of a dc motor is doubled and its speed is also doubled, the torque developed in the machine will  (1) get doubled (2) become 4 times (3) get halved (4) remain unaltered

As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit?

Compare statically induced emf with dynamically induced emf on any four points.

Define: 1) statically induced EMF 2) dynamically induced EMF Write the names of equipments in which these two types of EMF get induced

A 200 V dc motor takes a field current of 2 A to generate a back emf of 180 V. If the field winding resistance is 80 Ω, the resistance of the shunt field regulator is (A) 10 Ω (B) 20 Ω (C) 100 Ω (D) 180 Ω

What is the principle of DC motor?

A single-phase half-controlled rectifier is driving a separately excited dc motor. The dc motor has a back emf constant of 0.5 V/rpm. The armature current is 5 A without any ripple. The armature resistance is 2 Ohm. The converter is working from a 230 V, single-phase ac source with a firing angle of 30o . Under this operating condition, the speed of the motor will be  (A) 339 rpm (B) 359 rpm (C) 366 rpm (D) 386 rpm

What are the advantages of DC series motor?

What is the slip (as a percentage) when a 6 pole single phase induction motor operating on 220 V and 60 Hz is rotating at speed of 1140 rpm? A) 60% B) 5% C) 10% D) None of these

What is the maximum value of torque angle in synchronous motor?

What is the definition of induction motor?

What is the function of induction motor?

What is the principle of synchronous motor?

What is the use of synchronous motor?

What is the RPM of a DC motor?

What is the principle of AC motor?

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What is the use of an electric motor?

Which type of starter is used to start the DC motor?

What are the parts of AC motor?