A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The induced emf in the wire isa)675 andtimes; 102Vb)675 Vc)675 mVd)675 andtimes; 105VCorrect answer is option 'B'. Can you explain this answer?

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A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m². The induced emf in the wire is

a)
675 × 10²V
b)
675 V
c)
675 mV
d)
675 × 10⁵V

Correct answer is option 'B'. Can you explain this answer?

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A wire of length 3m is moving with a speed of 50m/s in a direction per...

Motional emf: The emf induced due to motion relative to a magnetic field is called the motional emf.

Consider a straight conductor PQ moving perpendicular to a uniform magnetic field B.
- Assume the motion of the rod to be uniform with a constant velocity of (v m/s).
- The rectangle PQRS forms a closed circuit enclosing a changing area due to the motion of the rod PQ.
The magnetic flux ϕ enclosed by the loop PQRS can be given as:

⇒ ϕ = B × area = B × (l.x)

Since the conductor is moving, there is a change in the rate of area moving. This causes a rate of change of flux which induces an emf.
This induced emf is given by:

Where - dx/dt = v is the speed of the conductor PQ

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A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The induced emf in the wire isa)675 × 102Vb)675 Vc)675 mVd)675 × 105VCorrect answer is option 'B'. Can you explain this answer?

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A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The induced emf in the wire isa)675 × 102Vb)675 Vc)675 mVd)675 × 105VCorrect answer is option 'B'. Can you explain this answer? for EmSAT Achieve 2025 is part of EmSAT Achieve preparation. The Question and answers have been prepared according to the EmSAT Achieve exam syllabus. Information about A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The induced emf in the wire isa)675 × 102Vb)675 Vc)675 mVd)675 × 105VCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for EmSAT Achieve 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A wire of length 3m is moving with a speed of 50m/s in a direction perpendicular to a magnetic field of 4.5 Wb/m2. The induced emf in the wire isa)675 × 102Vb)675 Vc)675 mVd)675 × 105VCorrect answer is option 'B'. Can you explain this answer?.

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