A simple electric motor has an armature resistance of 
and runs from a dc source of 
. When running unloaded it draws a current of 
. When a certain load is connected, its speed becomes half of its unloaded value. The new value of current drawn:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
For a DC motor:
No-load condition:
When speed becomes half:
Back EMF 
speed
Apply equation again:
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