When the conductor is moved with its length parallel to the lines of magnetic field:
Correct answer: D. None of these
- A. emf passes through the conductor
- B. emf is induced across its ends
- C. Both (a) and (b)
- D. None of these
Explanation
When a conductor is moved parallel to the lines of magnetic field, neither emf passes through the conductor nor is it induced across its ends. Here's why:Magnetic flux remains constant: For emf induction to occur, there needs to be a change in the magnetic flux through the conductor. When the conductor moves parallel to the field lines, the area vector of the conductor remains perpendicular to the field lines, and the magnetic flux through the conductor remains constant. Therefore, no emf is induced.No Lorentz force: Additionally, when the conductor moves parallel to the field, the direction of its motion and the magnetic field are parallel, resulting in no Lorentz force acting on the charged particles within the conductor. Since Lorentz force is responsible for deflecting charged particles and inducing current, its absence implies no induced current or emf.Therefore, the correct answer is None of these.
Last updated
About Electromagnetic Induction
Changing magnetic flux induces an emf according to Faraday's law, while Lenz's law gives the direction that opposes the change producing it. Transformers apply induction between coils to step alternating voltage up or down, with turns ratio, current transformation and energy losses determining practical operation.
Practise Electromagnetic Induction
288 free Electromagnetic Induction MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A 25 wattand 100 watt bulbs are joined in series and connected to the mains.Which bulb will glow brighter?
A 50 mH coil carries a current of 2A. The energy stored in its magnetic field is:
A.C generator is a device which converts:
A.C is converted into D.C by:
A coil has an inductance of 0.02 Henry. When a current in the coil is changing at the rate of 150 A/S then the induced emf will be: