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A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed through a type-A chopper. If the armature resistance is 1 Ω and duty cycle of chopper is 60%, the speed of the motor when it draw a current of 20 A would be approximately equal to
  • a)
    636 rpm    
  • b)
    842 rpm
  • c)
    764 rpm    
  • d)
    535 rpm
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed t...
To find the armature current, we can use Ohm's Law.

Ohm's Law states that V = I * R, where V is the voltage, I is the current, and R is the resistance.

In this case, the voltage is 220 V and the resistance is 1 Ω. Rearranging the formula, we get I = V / R.

I = 220 V / 1 Ω = 220 A

So, the armature current is 220 A.
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Community Answer
A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed t...

The output voltage,
V0 = αVs = 0.6 x 220 - 132 V
∴ Back emf

At no- load, N1, = 1500 rpm and Eb1 = 220 V Now, Eb α N
∴ 
or, 
or, 
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A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed through a type-A chopper. If the armature resistance is 1 Ω and duty cycle of chopper is 60%, the speed of the motor when it draw a current of 20 A would be approximately equal toa)636 rpm b)842 rpmc)764 rpm d)535 rpmCorrect answer is option 'C'. Can you explain this answer?
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A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed through a type-A chopper. If the armature resistance is 1 Ω and duty cycle of chopper is 60%, the speed of the motor when it draw a current of 20 A would be approximately equal toa)636 rpm b)842 rpmc)764 rpm d)535 rpmCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed through a type-A chopper. If the armature resistance is 1 Ω and duty cycle of chopper is 60%, the speed of the motor when it draw a current of 20 A would be approximately equal toa)636 rpm b)842 rpmc)764 rpm d)535 rpmCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 220 V dc shunt motor runs at 1500 rpm at no-load. The motor is fed through a type-A chopper. If the armature resistance is 1 Ω and duty cycle of chopper is 60%, the speed of the motor when it draw a current of 20 A would be approximately equal toa)636 rpm b)842 rpmc)764 rpm d)535 rpmCorrect answer is option 'C'. Can you explain this answer?.
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