While testing variable resistors Technician A says that whil

While testing variable resistors: Technician A says that while checking a rheostat with a voltmeter. the voltage should change smoothly with a change in the control. Technician B says that a potentiometer can be checked with a scope. Who is correct? Technician A Technician B Both A and B Neither A nor B

Solution

answer is..b..technician B... because

Meters are so sensitive

We should not keep directly

Smoothly varying only

otherwise meter will burn,so..slowly increase the rheostat