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A circular wire is connected to a battery of V volts via two diametrically opposite points P and Q as shown in the figure. The magnetic field strength at the centre of the loop will be
  • a)
    proportional to current I
  • b)
    zero
  • c)
    proportional to the radius of the loop
  • d)
    proportional to the resistance of the wire
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A circular wire is connected to a battery of V volts via two diametric...
For a loop carrying current, the strength of the magnetic field is given by:


In the figure, the current I is divided into two arms. Further,

Here, R = Resistance of arc L = Length of arc θ = Angle substandard by arc at the centre Therefore, Iθ = constant Thus, the magnetic field at the centre of the loop will be opposite and equal to each other due to the arcs PAQ and PBQ.Hence, magnetic field strength at the centre of the loop will be zero.Thus, it is the correct option.
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A circular wire is connected to a battery of V volts via two diametrically opposite points P and Q as shown in the figure. The magnetic field strength at the centre of the loop will bea)proportional to current Ib)zeroc)proportional to the radius of the loopd)proportional to the resistance of the wireCorrect answer is option 'B'. Can you explain this answer?
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A circular wire is connected to a battery of V volts via two diametrically opposite points P and Q as shown in the figure. The magnetic field strength at the centre of the loop will bea)proportional to current Ib)zeroc)proportional to the radius of the loopd)proportional to the resistance of the wireCorrect answer is option 'B'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about A circular wire is connected to a battery of V volts via two diametrically opposite points P and Q as shown in the figure. The magnetic field strength at the centre of the loop will bea)proportional to current Ib)zeroc)proportional to the radius of the loopd)proportional to the resistance of the wireCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A circular wire is connected to a battery of V volts via two diametrically opposite points P and Q as shown in the figure. The magnetic field strength at the centre of the loop will bea)proportional to current Ib)zeroc)proportional to the radius of the loopd)proportional to the resistance of the wireCorrect answer is option 'B'. Can you explain this answer?.
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