Today I had an electrical problem at my home not yet resolved. I will explain the problem.
The switch for water motor and switch for lamp are nearby in same board. When I turn ON the lamp switch, the lamp is glowing untill the switch for motor is OFF. When the motor switch is turned ON the lamp despite its switch turned ON stops glowing and motor is also not operating. When the motor switch is turned ON with lamp switch OFF, the motor is not operating. The performance of other electricals in home is not disturbed.
What may be the reason?
As a school boy electrical enthuiasist I suspect there may increase in ohmic resistance at wire (due to some effects) series to the parallel combination of these two switches. So lamp which has high resistance able to grab some enough voltage despite that unknown series resistance. But motor which has lower resistance cannot.
Can you explain technically?
Edit: The motor was working well for years with same electricals undisturbed. This fault occured today.