Biot-Savart Law
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PHXII04:MOVING CHARGES AND MAGNETISM

362677 For a circular current carrying loop having a magnetic moment \(\vec m\), the magnetic field \(\vec{B}\), at a distance \(x\) on the axis of the loop \((x > > R)\) is

1 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{\vec{m}}{x^{3}}\)
2 \(\frac{{{\mu _0}}}{{4\pi }}\frac{{\vec m}}{{{x^3}}}\)
3 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
4 \(\dfrac{\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362678 The magnetic field at the centre of a circular current carrying conductor of radius \(r\) is \(B_{c}\). The magnetic field on its axis at a distance \(r\) from the centre is \(B_{a}\). The value of \(B_{c}: B_{a}\) will be

1 \(2 \sqrt{2}: 1\)
2 \(\sqrt{2}: 1\)
3 \(1: \sqrt{2}\)
4 \(1: 2 \sqrt{2}\)
KCET - 2008
PHXII04:MOVING CHARGES AND MAGNETISM

362679 Assertion :
In circular loop of wire. perpendicular components of magnetic field at some distance trom centre of loop turned over the whole loop cancel.
Reason :
The resultant of magnetic field on axial point of circular loop is due to axial component of field.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362680 Assertion :
For a point on the axis of a circular coil carrying current, magnetic field is maximum at the centre of the coil.
Reason :
Magnetic field is inversely proportional to the distance of point from the circular coil.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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PHXII04:MOVING CHARGES AND MAGNETISM

362677 For a circular current carrying loop having a magnetic moment \(\vec m\), the magnetic field \(\vec{B}\), at a distance \(x\) on the axis of the loop \((x > > R)\) is

1 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{\vec{m}}{x^{3}}\)
2 \(\frac{{{\mu _0}}}{{4\pi }}\frac{{\vec m}}{{{x^3}}}\)
3 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
4 \(\dfrac{\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362678 The magnetic field at the centre of a circular current carrying conductor of radius \(r\) is \(B_{c}\). The magnetic field on its axis at a distance \(r\) from the centre is \(B_{a}\). The value of \(B_{c}: B_{a}\) will be

1 \(2 \sqrt{2}: 1\)
2 \(\sqrt{2}: 1\)
3 \(1: \sqrt{2}\)
4 \(1: 2 \sqrt{2}\)
KCET - 2008
PHXII04:MOVING CHARGES AND MAGNETISM

362679 Assertion :
In circular loop of wire. perpendicular components of magnetic field at some distance trom centre of loop turned over the whole loop cancel.
Reason :
The resultant of magnetic field on axial point of circular loop is due to axial component of field.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362680 Assertion :
For a point on the axis of a circular coil carrying current, magnetic field is maximum at the centre of the coil.
Reason :
Magnetic field is inversely proportional to the distance of point from the circular coil.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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PHXII04:MOVING CHARGES AND MAGNETISM

362677 For a circular current carrying loop having a magnetic moment \(\vec m\), the magnetic field \(\vec{B}\), at a distance \(x\) on the axis of the loop \((x > > R)\) is

1 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{\vec{m}}{x^{3}}\)
2 \(\frac{{{\mu _0}}}{{4\pi }}\frac{{\vec m}}{{{x^3}}}\)
3 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
4 \(\dfrac{\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362678 The magnetic field at the centre of a circular current carrying conductor of radius \(r\) is \(B_{c}\). The magnetic field on its axis at a distance \(r\) from the centre is \(B_{a}\). The value of \(B_{c}: B_{a}\) will be

1 \(2 \sqrt{2}: 1\)
2 \(\sqrt{2}: 1\)
3 \(1: \sqrt{2}\)
4 \(1: 2 \sqrt{2}\)
KCET - 2008
PHXII04:MOVING CHARGES AND MAGNETISM

362679 Assertion :
In circular loop of wire. perpendicular components of magnetic field at some distance trom centre of loop turned over the whole loop cancel.
Reason :
The resultant of magnetic field on axial point of circular loop is due to axial component of field.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362680 Assertion :
For a point on the axis of a circular coil carrying current, magnetic field is maximum at the centre of the coil.
Reason :
Magnetic field is inversely proportional to the distance of point from the circular coil.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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PHXII04:MOVING CHARGES AND MAGNETISM

362677 For a circular current carrying loop having a magnetic moment \(\vec m\), the magnetic field \(\vec{B}\), at a distance \(x\) on the axis of the loop \((x > > R)\) is

1 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{\vec{m}}{x^{3}}\)
2 \(\frac{{{\mu _0}}}{{4\pi }}\frac{{\vec m}}{{{x^3}}}\)
3 \(\dfrac{-\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
4 \(\dfrac{\mu_{0}}{4 \pi} \dfrac{2 \vec{m}}{x^{3}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362678 The magnetic field at the centre of a circular current carrying conductor of radius \(r\) is \(B_{c}\). The magnetic field on its axis at a distance \(r\) from the centre is \(B_{a}\). The value of \(B_{c}: B_{a}\) will be

1 \(2 \sqrt{2}: 1\)
2 \(\sqrt{2}: 1\)
3 \(1: \sqrt{2}\)
4 \(1: 2 \sqrt{2}\)
KCET - 2008
PHXII04:MOVING CHARGES AND MAGNETISM

362679 Assertion :
In circular loop of wire. perpendicular components of magnetic field at some distance trom centre of loop turned over the whole loop cancel.
Reason :
The resultant of magnetic field on axial point of circular loop is due to axial component of field.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
PHXII04:MOVING CHARGES AND MAGNETISM

362680 Assertion :
For a point on the axis of a circular coil carrying current, magnetic field is maximum at the centre of the coil.
Reason :
Magnetic field is inversely proportional to the distance of point from the circular coil.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
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