Embibe Experts Solutions for Chapter: Magnetic Effect of Current, Exercise 1: AMU-AT (B.Tech.) 2017

When two parallel wires carry currents in the same direction,

A cyclotron's oscillator frequency is $10\mathrm{MHz}$. What should be the operating magnetic field for accelerating protons? (mass of the proton $=1.67\times {10}^{-27} \mathrm{kg}$ )

Two long straight wires vertically pierced the plane of the paper at vertices of an equilateral triangle as shown in figure. They each carry $2 \mathrm{A},$ out of the paper. The magnetic field at the third vertex $P$ has magnitude.

A magnetic field cannot

Two long conductors, separated by a distance $d$ carry currents $I_1$  and $I_2$ in the same direction. They exert a force $F$ on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to $3d$. The new value of force between them is

$1\mathrm{A}$ current flows through an infinitely long straight wire. The magnetic field produced at a point $1 \mathrm{m}$ away from it is