Embibe Experts Solutions for Chapter: Moving Charges and Magnetism, Exercise 1: Exercise

Two parallel wires separated by $2 \mathrm{m}$ carry currents of $3\mathrm{A}$ each in the opposite directions. Find the magnetic induction for the points between the wires at a distance $50 \mathrm{cm}$from each wire.

A galvanometer of resistance $50 \Omega$ produces full-scale deflection for a current of $0.15 \mathrm{A}$. Determine the value of shunt required to make it an ammeter of range of $1.5 \mathrm{A}$ and  $5 \mathrm{A}$.

An ammeter and a voltmeter of suitable ranges are to be used to measure the current and voltage of an electric lamp. If a mistake were made and the meters are interchanged what will happen? Explain.

An electron accelerated by a potential difference of $300 \mathrm{V}$ is moving at a distance of $4 \mathrm{mm}$ from a long, straight wire. If a current of $5 \mathrm{A}$ flows through the wire, what will be the force acting on the electron ?

With the help of a diagram, explain the principle and working of a cyclotron. Show that cyclotron frequency does not depend on the speed of the particles.

An electron is moving with a speed of$3.0 \mathrm{x} {10}^7 {\mathrm{ms}}^{-1}$ along a circle in a magnetic field of  $0.50 \mathrm{N} {\mathrm{A}}^{-1} {\mathrm{m}}^{-1}$. Calculate the radius of the circle and the kinetic energy of the electron.

Why can't a cyclotron accelerate electrons?

Describe the working of cyclotron. Draw the diagram showing path of particle in both "Dees" Derive expression for frequency of cyclotron.