An electric motor operating on a 50 V dc...

An electric motor operating on a `50 V dc` supply draws a current of `12 A`. If the efficiency of the motor is `30 %`,estimate the resistance of the windings of the motor.

`6 Omega`

`4 Omega`

`2.9 Omega`

`3.1 Omega`

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

ELECTRO MAGNETIC INDUCTION
ERRORLESS |Exercise OT|3 Videos
ELECTRO MAGNETIC INDUCTION
ERRORLESS |Exercise Motional EMI|1 Videos
CURRENT ELECTRICITY
ERRORLESS |Exercise Self Evaluation Test -19|23 Videos
ELECTRON, PHOTON, PHOTOELECTRIC EFFECT AND X-RAYS
ERRORLESS |Exercise Self Evaluation Test|3 Videos

Similar Questions

Explore conceptually related problems

An electric motor operating on a 50V d.e. supply draws a current of 12A. If the efficiency of the motor is 30\%, estimate the resistance of the windings of the motor.

An electric motor operating on a 60 V dc supply draws a currrent of 10A . If the effeciency of the motor is 50% , the resistance of its winding is

An electric motor operating on 50 volt D.C. supply draws a current of 10 amp. If the efficiency of motor is 40% then the resistance of the winding of the motor is

An electric motor operates on a 50V d.c. supply draw a current of 15 A . If the motor yields a mechanical power of 150 W estimate the power dissipated across its windings. Also find the efficiency of the motor ?

The efficiency of d.c. motor is given by eta =

An electric motor operates on a 50V supply and draws a current of 12A. If the motor yields a mechanical power of 150W. What is the percentage efficiency of the motor?

An electric motor operates on a 110 V supply and draws a current of 10 A. If the motor yields a mechanical power of 330 watt, what is the efficiency of the motor ?

An electric motor runs a D.C. source of e.m.f. 200 V and draws a current of 10A . If the efficiency is 40% , then ressistance of the armature is:

ERRORLESS -ELECTRO MAGNETIC INDUCTION-SET

An electric motor operating on a 50 V dc supply draws a current of 12...
Text Solution
|
The figure shows four wire loops, with edge length of either L or 2L. ...
Text Solution
|
A circular coil and a bar magnet placed nearby are made to move in the...
Text Solution
|
A square coil ABCD lying in x-y plane with its centre at origin. A lon...
Text Solution
|
A short magnet is allowed to fall from rest along the axis of a horizo...
Text Solution
|
The horizontal component of the earth's magnetic field at a place is 3...
Text Solution
|
A copper disc of radius 0.1 m rotates about its centre with 10 revolut...
Text Solution
|
A coil of Cu wire (radius r, self-inductance L) is bent in two concen...
Text Solution
|
In which of the following circuits is the current maximum just after t...
Text Solution
|
A small coil is introduced between the poles of an electromagnet so th...
Text Solution
|
Two circular coils A and B are facing each other as shown in figure. T...
Text Solution
|
A conductuing loop having a capacitor is moving outward from the magne...
Text Solution
|
A straight wire of length L is bent into a semicircle. It is moved in ...
Text Solution
|
If in a coil rate of change of area is (5meter^(2))/(milli second)and ...
Text Solution
|
In series with 20 ohm resitor a 5 henry inductor is placed. To the com...
Text Solution
|
Two circular coils P & Q are coaxially & carry currents I1 and I2 resp...
Text Solution
|
The phase difference between the flux linkage and the induced e.m.f. i...
Text Solution
|
A pair of parallel conducting rails lie at right angle to a uniform ma...
Text Solution
|
The magnetic field in the cylindrical region shown in figure increase ...
Text Solution
|
An aircraft with a wingspan of 40 m flies a speed of 1080 km hr(1) in ...
Text Solution
|
A hundred turns of insulated copper wire are wrapped around an iron cy...
Text Solution
|