Questions
As shown in the figure, a metal rod makes contact and complete the circuit. The circuit is perpendicular to the magnetic field with B = 0.15 T. If the resistance is force needed to move the rod as indicated with a constant speed of 2 m/s is
detailed solution
Correct option is A
Induced current in the circuit, i=BvlRMagnetic force acting on the wire,Fm=Bil=BBvlRl⇒Fm=B2vl2RExternal force needed to move the rod with constant velocity isFm=B2vl2R=(0.15)2×(2)×(0.5)23=3.75×10-3 NTalk to our academic expert!
Similar Questions
A metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in horizontal direction (as shown) so that the pendulum now swings through the field, the pendulum will
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