Questions
PQ is an infinite current carrying conductor. AB and CD are smooth conducting rods on which a conductor EF moves with constant velocity v as shown. The force needed
to maintain constant speed of EF is(neglect the weight of conductor)
detailed solution
Correct option is A
Induced emf ∫ab Bvdx=∫ab μ0I2πxvdx⇒ Induced emf, E=μ0Iv2πlnba⇒ Power dissipated =E2R Also, power =F⋅v⇒F=E2vRF=μ0Iv2πlnba21vRTalk to our academic expert!
Similar Questions
A square wire loop, of side a has a long straight wire carrying a constant current i that passes through the centre of the loop and perpendicular to its plane as shown in Fig.
The current induced in the square loop is
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