MCQ
A motor starter
- AIs a variable resistor
- BOffsets the back $emf$ variations
- CHelps start a $DC$ motor
- ✓All of these
starting resisted are used in high power $D)$ ( motes, before we had variable frequent $A C$ motor drive, high power $D C$ motors were compos. Starting ngistors are used to limit starting cessent. Therefore they of sets back emt mosiations so answer is all of these.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$A.$ The force on the element $AC$ of the wire is $\frac{{\sqrt 3 }}{2}\,ILB$ directed into the page
$B.$ The force on the element $AB$ of the wire is $\frac{{\sqrt 3 }}{2}\,ILB$ directed into the page
$C.$ The total force on the loop $ABCA$ is zero.
Which of the above is /are not true ?