B M Sharma Solutions for Chapter: Magnetic Field and Magnetic Forces, Exercise 3: DPP

An infinitely long, straight conductor $AB$ is fixed and a current is passed through it. Another movable straight wire $CD$ of finite length and carrying current is held perpendicular to it and released. Neglect weight of the wire.

A conductor in the form of a right angle $ABC$ with $AB=3 \mathrm{cm}$ and $BC=4 \mathrm{cm}$ carries a current of $10 \mathrm{A}$. There is a uniform magnetic field of $5 \mathrm{T}$ perpendicular to the plane of the conductor. The force on the conductor will be?

A uniform conducting wire $ABC$ has a mass of $10 \mathrm{g}$. A current of $2 \mathrm{A}$ flows through it. The wire is kept in a uniform magnetic field $B = 2\mathrm{T}$. The acceleration of the wire will be

A current carrying wire $LN$ is bent in the form as shown below. If the wire carries a current of $10 \mathrm{A}$ and it is placed in a magnetic field of $5 \mathrm{T}$ which acts perpendicular to the paper outwards then it will experience a force of

A wire carrying a current $i$ is placed in a uniform magnetic field $\left(B\right)$ perpendicular to the plane of wire in the form of the curve $y=a \sin \left(\frac{\pi x}{L}\right); 0\le x\le 2L$. The force acting on the wire is

Two long wires are hanging freely. They are joined first in parallel and then in series and then are connected with a battery. Which type of force acts between the two wires in both cases?

A long wire$\mathit{ }AB$ is placed on a table. Another wire $PQ$ of mass $1.0 \mathrm{g}$ and length $50 \mathrm{cm}$ is set to slide on two rails $PS$ and $QR$. A current of $50 \mathrm{A}$ is passed through the wires. At what distance above $AB$, will the wire $PQ$ be in equilibrium?

What is the net force on the square coil?