This document contains instructions for physics problems involving electromagnetism and circuits. It asks the reader to: state Ampere's circuital law and use it to find the magnetic field of a straight conductor; find the magnetic field due to a current-carrying solenoid; obtain an expression for the maximum kinetic energy of a charged particle in a cyclotron; calculate the magnetic force between two straight parallel conductors and use it to define the standard ampere; calculate the force on a charged particle in an electric field and determine the nature of its path; and explain how to convert a galvanometer into an ammeter and obtain an expression.

1. State and prove ampere circuital law. Using this law find the magnetic field at a point due to a straight
conductor.
Find the magnetic field due to a current carrying solenoid.
Obtain an expression for the maximum K.E. of a charged particle in a cyclotrone.
Calculate the magnetic force between two straight parallel conductor. Using the expression define the
standard Ampere.
Calculate the force on the charged particle in an electric field. Also find the nature of the path.
How will you convert a galvanometer into an ammeter? Obtain an expression.