Embibe Experts Solutions for Exercise 4: Assignment

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

Two protons $A$ and $B$ move parallel to the $x$-axis in opposite directions with equal speeds $V.$ At the instant shown, the ratio of magnetic force and electric force acting on the proton $A$ is $(c=$ speed of light in vacuum)

If the planes of two identical concentric coils are perpendicular and the magnetic moment of each coil is $M,$ then the resultant magnetic moment of the two coils will be

In a hydrogen atom, an electron of mass $m$ and charge e revolves in an orbit of radius $r$ making $n$ revolutions per second. If the mass of hydrogen nucleus is $M,$ the magnetic moment associated with the orbital motion of electron is

The phosphor bronze strip is used in a moving coil galvanometer because

A uniform circular wire loop is connected to the terminals of a battery. The magnetic field induction at the centre due to $ABC$ portion of the wire will be (length of $ABC=l_1,$ length of $ADC=l_2$)

A wire of length $Lm$ carrying a current $IA,$ is bent in the form of a circle. The magnetic moment is

Bohr magneton is given by (symbols have their usual meanings)