Questions
An electric motor operating on a 60 V dc supply draws a current of 10 A. If the efficiency of the motor is 50%, the resistance of its winding is
detailed solution
Correct option is A
Efficiency η=50% So e=E/2 and i=E−eR⇒i=E−E/2R=E2R⇒R=E2i=602×10=3ΩTalk to our academic expert!
Similar Questions
A square wire loop, of side a has a long straight wire carrying a constant current i that passes through the centre of the loop and perpendicular to its plane as shown in Fig.
The current induced in the square loop is
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