00. Biot-Savart's Law and Magnetic Field, Lorentz Force
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Moving Charges & Magnetism

153343 Two long straight wires, each carrying an electric current of $5 \mathrm{~A}$, are kept parallel to each other at a separation of $2.5 \mathrm{~cm}$. Find the magnitude of the magnetic force experienced by $10 \mathrm{~cm}$ of a wire.

1 $4.0 \times 10^{-4} \mathrm{~N}$
2 $3.5 \times 10^{-6} \mathrm{~N}$
3 $2.0 \times 10^{-5} \mathrm{~N}$
4 $2.0 \times 10^{-9} \mathrm{~N}$
JIPMEER-2015
Moving Charges & Magnetism

153344 Match the following and find the correct pairs.
| | List-I | | List-II |
| :--- | :--- | :--- | :--- |
| (A) | Fleming's left \ltbr> hand rule | (i) | Direction of \ltbr> induced current |
| (B) | Right hand thumb \ltbr> rule | (ii) | Magnitude and \ltbr> direction of \ltbr> magnetic \ltbr> induction |
| (C) | Biot-Savart law | (iii) | Direction of force \ltbr> due to magnetic \ltbr> induction |
| (D) | Fleming's right \ltbr> hand rule | (iv) | Direction of \ltbr> magnetic lines \ltbr> due to current |

1 (A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
2 (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3 (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
4 (A)-(iv), (B)-(iii), (C)-( i), (D)-(ii)
AP EAMCET -2011
Moving Charges & Magnetism

153346 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $\mathbf{n}$ turns. The magnetic field at the centre of the coil will be

1 $\mathrm{nB}$
2 $\mathrm{n}^{2} \mathrm{~B}$
3 $2 \mathrm{nB}$
4 $2 n^{2} B$
NEET-2016
Moving Charges & Magnetism

153347 A deutron of kinetic energy $50 \mathrm{keV}$ is describing a circular orbit of radius $0.5 \mathrm{~m}$ in a plane perpendicular to magnetic field $B$. The kinetic energy of the proton that describes a circular orbit of radius $0.5 \mathrm{~m}$ in the same plane with the same magnetic field $B$ is

1 $25 \mathrm{keV}$
2 $50 \mathrm{keV}$
3 $200 \mathrm{keV}$
4 $100 \mathrm{keV}$
CBSE AIPMT 1991
Moving Charges & Magnetism

153348 A charged particle of charge $q$ and mass $m$ enters perpendicularly in a magnetic field $B$. Kinetic energy of the particle is $E$, then frequency of rotation is

1 $\frac{\mathrm{qB}}{\mathrm{m} \pi}$
2 $\frac{\mathrm{qB}}{2 \pi \mathrm{m}}$
3 $\frac{\mathrm{qBE}}{2 \pi \mathrm{m}}$
4 $\frac{\mathrm{qB}}{2 \pi \mathrm{E}}$
CBSE AIPMT 2007
NEET DIGITAL LIBRARY
Moving Charges & Magnetism

153343 Two long straight wires, each carrying an electric current of $5 \mathrm{~A}$, are kept parallel to each other at a separation of $2.5 \mathrm{~cm}$. Find the magnitude of the magnetic force experienced by $10 \mathrm{~cm}$ of a wire.

1 $4.0 \times 10^{-4} \mathrm{~N}$
2 $3.5 \times 10^{-6} \mathrm{~N}$
3 $2.0 \times 10^{-5} \mathrm{~N}$
4 $2.0 \times 10^{-9} \mathrm{~N}$
JIPMEER-2015
Moving Charges & Magnetism

153344 Match the following and find the correct pairs.
| | List-I | | List-II |
| :--- | :--- | :--- | :--- |
| (A) | Fleming's left \ltbr> hand rule | (i) | Direction of \ltbr> induced current |
| (B) | Right hand thumb \ltbr> rule | (ii) | Magnitude and \ltbr> direction of \ltbr> magnetic \ltbr> induction |
| (C) | Biot-Savart law | (iii) | Direction of force \ltbr> due to magnetic \ltbr> induction |
| (D) | Fleming's right \ltbr> hand rule | (iv) | Direction of \ltbr> magnetic lines \ltbr> due to current |

1 (A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
2 (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3 (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
4 (A)-(iv), (B)-(iii), (C)-( i), (D)-(ii)
AP EAMCET -2011
Moving Charges & Magnetism

153346 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $\mathbf{n}$ turns. The magnetic field at the centre of the coil will be

1 $\mathrm{nB}$
2 $\mathrm{n}^{2} \mathrm{~B}$
3 $2 \mathrm{nB}$
4 $2 n^{2} B$
NEET-2016
Moving Charges & Magnetism

153347 A deutron of kinetic energy $50 \mathrm{keV}$ is describing a circular orbit of radius $0.5 \mathrm{~m}$ in a plane perpendicular to magnetic field $B$. The kinetic energy of the proton that describes a circular orbit of radius $0.5 \mathrm{~m}$ in the same plane with the same magnetic field $B$ is

1 $25 \mathrm{keV}$
2 $50 \mathrm{keV}$
3 $200 \mathrm{keV}$
4 $100 \mathrm{keV}$
CBSE AIPMT 1991
Moving Charges & Magnetism

153348 A charged particle of charge $q$ and mass $m$ enters perpendicularly in a magnetic field $B$. Kinetic energy of the particle is $E$, then frequency of rotation is

1 $\frac{\mathrm{qB}}{\mathrm{m} \pi}$
2 $\frac{\mathrm{qB}}{2 \pi \mathrm{m}}$
3 $\frac{\mathrm{qBE}}{2 \pi \mathrm{m}}$
4 $\frac{\mathrm{qB}}{2 \pi \mathrm{E}}$
CBSE AIPMT 2007
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Moving Charges & Magnetism

153343 Two long straight wires, each carrying an electric current of $5 \mathrm{~A}$, are kept parallel to each other at a separation of $2.5 \mathrm{~cm}$. Find the magnitude of the magnetic force experienced by $10 \mathrm{~cm}$ of a wire.

1 $4.0 \times 10^{-4} \mathrm{~N}$
2 $3.5 \times 10^{-6} \mathrm{~N}$
3 $2.0 \times 10^{-5} \mathrm{~N}$
4 $2.0 \times 10^{-9} \mathrm{~N}$
JIPMEER-2015
Moving Charges & Magnetism

153344 Match the following and find the correct pairs.
| | List-I | | List-II |
| :--- | :--- | :--- | :--- |
| (A) | Fleming's left \ltbr> hand rule | (i) | Direction of \ltbr> induced current |
| (B) | Right hand thumb \ltbr> rule | (ii) | Magnitude and \ltbr> direction of \ltbr> magnetic \ltbr> induction |
| (C) | Biot-Savart law | (iii) | Direction of force \ltbr> due to magnetic \ltbr> induction |
| (D) | Fleming's right \ltbr> hand rule | (iv) | Direction of \ltbr> magnetic lines \ltbr> due to current |

1 (A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
2 (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3 (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
4 (A)-(iv), (B)-(iii), (C)-( i), (D)-(ii)
AP EAMCET -2011
Moving Charges & Magnetism

153346 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $\mathbf{n}$ turns. The magnetic field at the centre of the coil will be

1 $\mathrm{nB}$
2 $\mathrm{n}^{2} \mathrm{~B}$
3 $2 \mathrm{nB}$
4 $2 n^{2} B$
NEET-2016
Moving Charges & Magnetism

153347 A deutron of kinetic energy $50 \mathrm{keV}$ is describing a circular orbit of radius $0.5 \mathrm{~m}$ in a plane perpendicular to magnetic field $B$. The kinetic energy of the proton that describes a circular orbit of radius $0.5 \mathrm{~m}$ in the same plane with the same magnetic field $B$ is

1 $25 \mathrm{keV}$
2 $50 \mathrm{keV}$
3 $200 \mathrm{keV}$
4 $100 \mathrm{keV}$
CBSE AIPMT 1991
Moving Charges & Magnetism

153348 A charged particle of charge $q$ and mass $m$ enters perpendicularly in a magnetic field $B$. Kinetic energy of the particle is $E$, then frequency of rotation is

1 $\frac{\mathrm{qB}}{\mathrm{m} \pi}$
2 $\frac{\mathrm{qB}}{2 \pi \mathrm{m}}$
3 $\frac{\mathrm{qBE}}{2 \pi \mathrm{m}}$
4 $\frac{\mathrm{qB}}{2 \pi \mathrm{E}}$
CBSE AIPMT 2007
For More Updates join with Us
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Moving Charges & Magnetism

153343 Two long straight wires, each carrying an electric current of $5 \mathrm{~A}$, are kept parallel to each other at a separation of $2.5 \mathrm{~cm}$. Find the magnitude of the magnetic force experienced by $10 \mathrm{~cm}$ of a wire.

1 $4.0 \times 10^{-4} \mathrm{~N}$
2 $3.5 \times 10^{-6} \mathrm{~N}$
3 $2.0 \times 10^{-5} \mathrm{~N}$
4 $2.0 \times 10^{-9} \mathrm{~N}$
JIPMEER-2015
Moving Charges & Magnetism

153344 Match the following and find the correct pairs.
| | List-I | | List-II |
| :--- | :--- | :--- | :--- |
| (A) | Fleming's left \ltbr> hand rule | (i) | Direction of \ltbr> induced current |
| (B) | Right hand thumb \ltbr> rule | (ii) | Magnitude and \ltbr> direction of \ltbr> magnetic \ltbr> induction |
| (C) | Biot-Savart law | (iii) | Direction of force \ltbr> due to magnetic \ltbr> induction |
| (D) | Fleming's right \ltbr> hand rule | (iv) | Direction of \ltbr> magnetic lines \ltbr> due to current |

1 (A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
2 (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3 (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
4 (A)-(iv), (B)-(iii), (C)-( i), (D)-(ii)
AP EAMCET -2011
Moving Charges & Magnetism

153346 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $\mathbf{n}$ turns. The magnetic field at the centre of the coil will be

1 $\mathrm{nB}$
2 $\mathrm{n}^{2} \mathrm{~B}$
3 $2 \mathrm{nB}$
4 $2 n^{2} B$
NEET-2016
Moving Charges & Magnetism

153347 A deutron of kinetic energy $50 \mathrm{keV}$ is describing a circular orbit of radius $0.5 \mathrm{~m}$ in a plane perpendicular to magnetic field $B$. The kinetic energy of the proton that describes a circular orbit of radius $0.5 \mathrm{~m}$ in the same plane with the same magnetic field $B$ is

1 $25 \mathrm{keV}$
2 $50 \mathrm{keV}$
3 $200 \mathrm{keV}$
4 $100 \mathrm{keV}$
CBSE AIPMT 1991
Moving Charges & Magnetism

153348 A charged particle of charge $q$ and mass $m$ enters perpendicularly in a magnetic field $B$. Kinetic energy of the particle is $E$, then frequency of rotation is

1 $\frac{\mathrm{qB}}{\mathrm{m} \pi}$
2 $\frac{\mathrm{qB}}{2 \pi \mathrm{m}}$
3 $\frac{\mathrm{qBE}}{2 \pi \mathrm{m}}$
4 $\frac{\mathrm{qB}}{2 \pi \mathrm{E}}$
CBSE AIPMT 2007
NEET DIGITAL LIBRARY
Moving Charges & Magnetism

153343 Two long straight wires, each carrying an electric current of $5 \mathrm{~A}$, are kept parallel to each other at a separation of $2.5 \mathrm{~cm}$. Find the magnitude of the magnetic force experienced by $10 \mathrm{~cm}$ of a wire.

1 $4.0 \times 10^{-4} \mathrm{~N}$
2 $3.5 \times 10^{-6} \mathrm{~N}$
3 $2.0 \times 10^{-5} \mathrm{~N}$
4 $2.0 \times 10^{-9} \mathrm{~N}$
JIPMEER-2015
Moving Charges & Magnetism

153344 Match the following and find the correct pairs.
| | List-I | | List-II |
| :--- | :--- | :--- | :--- |
| (A) | Fleming's left \ltbr> hand rule | (i) | Direction of \ltbr> induced current |
| (B) | Right hand thumb \ltbr> rule | (ii) | Magnitude and \ltbr> direction of \ltbr> magnetic \ltbr> induction |
| (C) | Biot-Savart law | (iii) | Direction of force \ltbr> due to magnetic \ltbr> induction |
| (D) | Fleming's right \ltbr> hand rule | (iv) | Direction of \ltbr> magnetic lines \ltbr> due to current |

1 (A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
2 (A)-(iii), (B)-(iv), (C)-(ii), (D)-(i)
3 (A)-(ii), (B)-(iv), (C)-(iii), (D)-(i)
4 (A)-(iv), (B)-(iii), (C)-( i), (D)-(ii)
AP EAMCET -2011
Moving Charges & Magnetism

153346 A long wire carries a steady current. It is bent into a circle of one turn and the magnetic field at the centre of the coil is $B$. It is then bent into a circular loop of $\mathbf{n}$ turns. The magnetic field at the centre of the coil will be

1 $\mathrm{nB}$
2 $\mathrm{n}^{2} \mathrm{~B}$
3 $2 \mathrm{nB}$
4 $2 n^{2} B$
NEET-2016
Moving Charges & Magnetism

153347 A deutron of kinetic energy $50 \mathrm{keV}$ is describing a circular orbit of radius $0.5 \mathrm{~m}$ in a plane perpendicular to magnetic field $B$. The kinetic energy of the proton that describes a circular orbit of radius $0.5 \mathrm{~m}$ in the same plane with the same magnetic field $B$ is

1 $25 \mathrm{keV}$
2 $50 \mathrm{keV}$
3 $200 \mathrm{keV}$
4 $100 \mathrm{keV}$
CBSE AIPMT 1991
Moving Charges & Magnetism

153348 A charged particle of charge $q$ and mass $m$ enters perpendicularly in a magnetic field $B$. Kinetic energy of the particle is $E$, then frequency of rotation is

1 $\frac{\mathrm{qB}}{\mathrm{m} \pi}$
2 $\frac{\mathrm{qB}}{2 \pi \mathrm{m}}$
3 $\frac{\mathrm{qBE}}{2 \pi \mathrm{m}}$
4 $\frac{\mathrm{qB}}{2 \pi \mathrm{E}}$
CBSE AIPMT 2007