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JEE Mains 2020 Model Paper 2 New Pattern

PHYSICS

(SINGLE CORRECT ANSWER TYPE)
This section contains 20 multiple choice questions. Each question has 4 options (1) , (2) , 3) and (4) for its answer, out of which ONLY ONE option can be correct.

Question : 26 of 75

Marks: +1, -0

Two circular flat coils are co - axial as shown in fig. The smaller (secondary) coil has 25 turns and diameter 20 mm. The larger (primary) coil has 200 turns and diameter 40 mm. Find the mutual inductance (approximately) of the two coils, assuming the magnetic field of the primary coil is uniform through the secondary coil.

49 µH
70 µH
120 µH
240 µH

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