JEE MAIN - Physics (2021 - 27th August Morning Shift - No. 12)
A bar magnet is passing through a conducting loop of radius R with velocity $$\upsilon $$. The radius of the bar magnet is such that it just passes through the loop. The induced e.m.f. in the loop can be represented by the approximate curve :
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_27th_August_Morning_Shift_en_12_2.png)
_27th_August_Morning_Shift_en_12_3.png)
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_27th_August_Morning_Shift_en_12_5.png)
Explanation
_27th_August_Morning_Shift_en_12_6.png)
$$\to$$ When magnet passes through centre region of solenoid, no current / Emf is induced in loop.
$$\to$$ While entering flux increases so negative induced emf
$$\to$$ While leaving flux decreases so positive induced emf.
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