1.

A resistance coil, connected to an external battery is placed inside an adiabatic cylinder filled with frictionless piston of mass `m` and containing an ideal gas. A current `i` flows through the coil, which has resistance `R`. The speed with which the piston must move in order to keep the temperature of the gas constant will be A. `i^(2)R//mg`B. `iR//mg`C. `0`D. Data is insufficient.

Answer» Applying `COE`
`i^(2)Rt=mgx`
`rArr (dx)/(dt)=(i^(2)R)/(mg)`


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