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An electron moving in a circular orbit of radius $r$ makes $n$ rotations per second. The magnetic field produced at the center has magnitude:

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Important Questions on Moving Charges and Magnetism

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 14

Two identical long conducting wires

A O B

and

C O D

are placed at right angle to each other with one above other such that

O

is the common point for the two. The wires carry

I_{1}

and

I_{2}

currents, respectively. Point

P

is lying at distance

d

from

O

along a direction perpendicular to the plane containing the wires. The magnetic field at the point

P

will be,

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 15

A current loop in magnetic field:

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 16

When a proton is released from rest in a room, it starts with an initial acceleration

a_{0}

towards west. When it is projected towards north with a speed

v_{0}

it moves with an initial acceleration

3 a_{0}

towards west. The electric and magnetic fields in the room are

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 17

Two similar coils of radius

R

are lying concentrically with their planes at right angles to each other. The currents flowing in them are

I

and

2 I

, respectively. The resultant magnetic field induction at the centre will be

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 18

An alternating electric field, of frequency

v

, is applied across the dees (radius

= R

) of a cyclotron that is being used to accelerate protons (mass

= m

). The operating magnetic field

(B)

used in the cyclotron and the kinetic energy

(K)

of the proton beam, produced by it, are given by

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 19

A proton carrying

1 MeV

kinetic energy is moving in a circular path of radius

R

in uniform magnetic field. What should be the energy of an

α

- particle to describe a circle of same radius in the same field ?

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 20

A current carrying closed loop in the form of a right angle isosceles triangle $A B C$ is placed in a uniform magnetic field acting along $A B$ . If the magnetic force on the arm $B C$ is $\vec{F}$ , the force on the arm $A C$ is

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Gamma Question Bank for Medical Physics>Chapter 19 - Moving Charges and Magnetism>Assignment>Q 21

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electron

An electron moving in a circular orbit of radius r makes n rotations per second. The magnetic field produced at the center has magnitude:

Important Questions on Moving Charges and Magnetism

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An electron moving in a circular orbit of radius $r$ makes $n$ rotations per second. The magnetic field produced at the center has magnitude: