A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0 · 10 T normal to the plane of the coil. If the current in the coil is 5 · 0 A , what is the total force on the coil,

As the circular loop is placed in uniform magnetic field which is perpendicular to its plane, so the forces on the opposite ends of its any diameter with be equal and opposite. Hence, the resultant force on the circular loop will be zero.

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A proton of mass $m$ and charge $+ e$ is moving in a circular orbit in a magnetic field with energy $1 MeV$ . What should be the energy of $α - p a r t i c l e$ ( $m a s s = 4 m$ and $c h a r g e = + 2 e$ ), so that it can revolve in the path of the same radius?

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Important Questions on Moving Charges and Magnetism

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 40

Two metallic spheres of same mass are given equal and opposite charges; then -

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 41

Ratio of masses of proton and electron is

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 42

The charge on the atom containing

17

protons,

18

neutrons and

18

electrons is

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 43

A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle?

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 44

A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions with the environment?

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 45

An electron is moving west to east enters a chamber having a uniform electrostatic field in the north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight-line path.

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 46

A magnetic field set up using Helmholtz coils is uniform in a small region and has a magnitude of

0.75 T

. In the same region, a uniform electrostatic field is maintained in a direction normal to the common axis of the coils. A narrow beam of (single species) charged particles all accelerated through

15 kV

enters this region in a direction perpendicular to both the axis of the coils and the electrostatic field. If the beam remains undeflected when the electrostatic field is

9 \times 10^{- 5} V m^{- 1}

, make a simple guess as to what the beam contains. Why is the answer not unique?

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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Moving Charges and Magnetism>Exercise>Q 47

A circular coil of

20

turns and radius

10 cm

is placed in a uniform magnetic field of

0 \cdot 10 T

normal to the plane of the coil. If the current in the coil is

5 \cdot 0 A

, what is the total force on the coil,

A proton of mass m and charge +e is moving in a circular orbit in a magnetic field with energy 1 MeV. What should be the energy of α-particle (mass = 4m and charge = + 2e), so that it can revolve in the path of the same radius?

Important Questions on Moving Charges and Magnetism

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A proton of mass $m$ and charge $+ e$ is moving in a circular orbit in a magnetic field with energy $1 MeV$ . What should be the energy of $α - p a r t i c l e$ ( $m a s s = 4 m$ and $c h a r g e = + 2 e$ ), so that it can revolve in the path of the same radius?