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PHXII04:MOVING CHARGES AND MAGNETISM

362579 The electric current in a circular coil of four turns produces a magnetic induction \(32 T\) at its centre. The coil is unwound and is rewound into a circular coil of single by the same current will be

1 \(4 T\)
2 \(8 T\)
3 \(16 T\)
4 \(2 T\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362580 A long conducting wire having a current \(I\) flowing through it. It is bent into a circular coil of \(N\) turns. Then it is bent into a circular coil of \(n\) turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is

1 \(n^{2}: N^{2}\)
2 \(n: N\)
3 \(N^{2}: n^{2}\)
4 \(N: n\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362581 A plastic disc of radius ' \(R\) ' has a charge ' \(q\) ' uniformly distributed over its surface. If the disc is rotated with a frequency \('f\) about its axis, then the magnetic induction at the centre of the disc is given by

1 \(\frac{{{\mu _o}fq}}{R}\)
2 \(\frac{{{\mu _o}fq}}{{2\pi R}}\)
3 \(\dfrac{\mu_{o} q}{R}\)
4 \(\frac{{{\mu _0}f}}{{qR}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362582 A current \(i\) ampere flows in a circular arc of wire whose radius is \(R\), which substends an angle \(3 \pi / 2\) radian at its centre. The magnetic induction \(B\) at the centre is
supporting img

1 \(\dfrac{\mu_{0} i}{2 R}\)
2 \(\dfrac{2 \mu_{0} i}{R}\)
3 \(\dfrac{\mu_{0} i}{R}\)
4 \(\dfrac{3 \mu_{0} i}{8 R}\)
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PHXII04:MOVING CHARGES AND MAGNETISM

362579 The electric current in a circular coil of four turns produces a magnetic induction \(32 T\) at its centre. The coil is unwound and is rewound into a circular coil of single by the same current will be

1 \(4 T\)
2 \(8 T\)
3 \(16 T\)
4 \(2 T\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362580 A long conducting wire having a current \(I\) flowing through it. It is bent into a circular coil of \(N\) turns. Then it is bent into a circular coil of \(n\) turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is

1 \(n^{2}: N^{2}\)
2 \(n: N\)
3 \(N^{2}: n^{2}\)
4 \(N: n\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362581 A plastic disc of radius ' \(R\) ' has a charge ' \(q\) ' uniformly distributed over its surface. If the disc is rotated with a frequency \('f\) about its axis, then the magnetic induction at the centre of the disc is given by

1 \(\frac{{{\mu _o}fq}}{R}\)
2 \(\frac{{{\mu _o}fq}}{{2\pi R}}\)
3 \(\dfrac{\mu_{o} q}{R}\)
4 \(\frac{{{\mu _0}f}}{{qR}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362582 A current \(i\) ampere flows in a circular arc of wire whose radius is \(R\), which substends an angle \(3 \pi / 2\) radian at its centre. The magnetic induction \(B\) at the centre is
supporting img

1 \(\dfrac{\mu_{0} i}{2 R}\)
2 \(\dfrac{2 \mu_{0} i}{R}\)
3 \(\dfrac{\mu_{0} i}{R}\)
4 \(\dfrac{3 \mu_{0} i}{8 R}\)
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PHXII04:MOVING CHARGES AND MAGNETISM

362579 The electric current in a circular coil of four turns produces a magnetic induction \(32 T\) at its centre. The coil is unwound and is rewound into a circular coil of single by the same current will be

1 \(4 T\)
2 \(8 T\)
3 \(16 T\)
4 \(2 T\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362580 A long conducting wire having a current \(I\) flowing through it. It is bent into a circular coil of \(N\) turns. Then it is bent into a circular coil of \(n\) turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is

1 \(n^{2}: N^{2}\)
2 \(n: N\)
3 \(N^{2}: n^{2}\)
4 \(N: n\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362581 A plastic disc of radius ' \(R\) ' has a charge ' \(q\) ' uniformly distributed over its surface. If the disc is rotated with a frequency \('f\) about its axis, then the magnetic induction at the centre of the disc is given by

1 \(\frac{{{\mu _o}fq}}{R}\)
2 \(\frac{{{\mu _o}fq}}{{2\pi R}}\)
3 \(\dfrac{\mu_{o} q}{R}\)
4 \(\frac{{{\mu _0}f}}{{qR}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362582 A current \(i\) ampere flows in a circular arc of wire whose radius is \(R\), which substends an angle \(3 \pi / 2\) radian at its centre. The magnetic induction \(B\) at the centre is
supporting img

1 \(\dfrac{\mu_{0} i}{2 R}\)
2 \(\dfrac{2 \mu_{0} i}{R}\)
3 \(\dfrac{\mu_{0} i}{R}\)
4 \(\dfrac{3 \mu_{0} i}{8 R}\)
For More Updates join with Us
PHXII04:MOVING CHARGES AND MAGNETISM

362579 The electric current in a circular coil of four turns produces a magnetic induction \(32 T\) at its centre. The coil is unwound and is rewound into a circular coil of single by the same current will be

1 \(4 T\)
2 \(8 T\)
3 \(16 T\)
4 \(2 T\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362580 A long conducting wire having a current \(I\) flowing through it. It is bent into a circular coil of \(N\) turns. Then it is bent into a circular coil of \(n\) turns. The magnetic field is calculated at the centre of coils in both the cases. The ratio of the magnetic field in first case to that of second case is

1 \(n^{2}: N^{2}\)
2 \(n: N\)
3 \(N^{2}: n^{2}\)
4 \(N: n\)
JEE - 2023
PHXII04:MOVING CHARGES AND MAGNETISM

362581 A plastic disc of radius ' \(R\) ' has a charge ' \(q\) ' uniformly distributed over its surface. If the disc is rotated with a frequency \('f\) about its axis, then the magnetic induction at the centre of the disc is given by

1 \(\frac{{{\mu _o}fq}}{R}\)
2 \(\frac{{{\mu _o}fq}}{{2\pi R}}\)
3 \(\dfrac{\mu_{o} q}{R}\)
4 \(\frac{{{\mu _0}f}}{{qR}}\)
PHXII04:MOVING CHARGES AND MAGNETISM

362582 A current \(i\) ampere flows in a circular arc of wire whose radius is \(R\), which substends an angle \(3 \pi / 2\) radian at its centre. The magnetic induction \(B\) at the centre is
supporting img

1 \(\dfrac{\mu_{0} i}{2 R}\)
2 \(\dfrac{2 \mu_{0} i}{R}\)
3 \(\dfrac{\mu_{0} i}{R}\)
4 \(\dfrac{3 \mu_{0} i}{8 R}\)