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MODEL PAPER 10 — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMODEL PAPER 103 Marks
Question
The figure shows two identical rectangular loops (1) and (2) placed on a table along with a straight long current carrying conductor between them.
i. What will be the directions of the induced current in the loops when they are pulled away from the conductor with same velocity v?
ii. Will the emf induced in the two loops be equal?
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Answer

i. The direction of induced current will be such that it tends to maintain the original flux. So induced current flows anticlockwise in loop 1 and clockwise in loop 2.
ii. No, the emf's induced in the two loops will not be equal. Since, the rate of change of flux is more in the second coil, emf induced in the second coil is more than that in the first coil. 
Emf in the first coil, $E _1= Bav$
Emf in the school coil, $E _2= Bbv$
Since, $b > a$ therefore, $E _2> E _1$

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