What is the approximate dew point temperature when the dry-bulb temperature is 18°C and the wet-bulb temperature is 14.5°C?

Imagine that the rightward current flows in the rod for a short time. as a result, what will the net charge on the right and left ends of the rod become? left end negative and right end positive left end negative and right end negative left end negative and right end nearly neutral left end nearly neutral and right end positive both ends nearly neutral