CapacitanceHard
Question
A conducting wire of length l and mass m can slide without friction on two parallel rails and is connected to capacitance C. Whole system lies in a magnetic field B and a constant force F is applied to the rod. Then
Options
A.The rod moves with constant velocity
B.the rod moves with constant acceleration
C.there is constant charge on the capacitor.
D.charge on the capacitor increases with time
Solution
Let velocity of wire at time t is v, then
ε = Bvl
q = Cε, i =
= CBla
Fm = ilB
F - Fm = ma
ε = Bvl
q = Cε, i =
= CBlaFm = ilB
F - Fm = ma
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