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प्रश्न
A wire of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic field. If the e.m.f. induced in the wire is 2 V, the magnitude of the field in tesla is ______.
पर्याय
2
5
0.8
2.5
MCQ
रिकाम्या जागा भरा
उत्तर
A wire of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic field. If the e.m.f. induced in the wire is 2 V, the magnitude of the field in tesla is 0.8.
Explanation:
The magnitude of induced e.m.f. is given by
|e| = Blv
v = 300 m/min = 5m/s
∴ B = `|"e"|/"lv"`
= `2/(0.5xx5)`
= 0.8 tesla
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