A rheostat differs from potentiometer in the respect that it

Answer: Option B

A rheostat is designed to handle higher power levels compared to a potentiometer.

While both devices are used to vary resistance, rheostats are typically used in applications where high current is involved and are built to dissipate more heat, thus having a higher wattage rating.

Potentiometers, on the other hand, are generally used in low-power applications and have a lower wattage rating.

The key difference lies in their power handling capacity:

Rheostat = High wattage rating

Potentiometer = Low wattage rating