Embibe Experts Solutions for Chapter: Magnetic Effect of Current, Exercise 1: KCET (UG) 2018

Earth's magnetic field always has a horizontal component except at

An electron is moving in a circle of radius $r$ in a uniform magnetic field $B$. Suddenly, the field is reduced to $\frac{B}{2}$ . The radius of the circular path now becomes

 A charge $q$ is accelerated through a potential difference $V$. It is then passed normally through a uniform magnetic field, where it moves in a circle of radius $r$. The potential difference required to move it in a circle of radius $2r$ is

A strong magnetic field is applied on a stationary electron. Then the electron

A tightly wound long solenoid has $n$ turns per unit length, a radius $r$ and carries a current $I$. A particle having charge $q$ and mass $m$ is projected from a point on the axis in a direction perpendicular to the axis. The maximum speed of the particle for which the particle does not strike the solenoid is

A cyclotron's oscillator frequency is $10 \mathrm{MHz}$ and the operating magnetic field is $0.66 \mathrm{T}$. If the radius of its dees is $60 \mathrm{cm}$, then the kinetic energy of the proton beam produced by the accelerator is

Two parallel wires in free space are $10 \mathrm{cm}$ apart and each carries a current of $10 \mathrm{A}$ in the same direction. The force exerted by one wire on the other [per unit length] is

A toroid with thick windings of $N$ turns has inner and outer radii $R_1$ and $R_2$ respectively. If it carries certain steady current $I,$ the variation of the magnetic field due to the toroid with radial distance is correctly graphed in