A triangle loop as shown in the figure is started to being pulled out at `t=0` from a uniform magnetic field with a constant velocity `v`.Total resistance of the loop is constant and equals to `R`.Then the variation of power produced in the loop with time will be:
A. linearly increasing with time till whole loop come out
B. increases parabolically till whole loop comes out
C. `P alpha t^(3)` till whole loop come out
D. will be constant with time
