A conducting rod of mass m and length l is free to move without friction on two parallel long conducting rails, as shown below. There is a resistance R across the rails. In the entire space around, there is a uniform magnetic field B normal to the plane of the rod and rails. The rod is given an impulsive velocity `v_(0)`-

Finally, the initial energy `(1)/(2) mv_(0)^(2)`

Options

A. Will be converted fully into heat energy in the resistor
B. Will enable rod to continue to move with velocity `v_(0)` since the rails are frictionless
C. Will be converted fully into magnetic energy due to induced current
D. Will be converted into the work done against the magnetic field

Answer

A

Explanation

Due to the negative work on rod . .EK will decrease and finally become zero.