Embibe Experts Solutions for Chapter: Magnetic Effects of Current and Magnetism, Exercise 1: AP EAPCET 2020 (24-Sep Shift-1)

A charged particle having charge $2 \mathrm{C}$ is thrown with velocity $2\hat{i}+3\hat{j}$ inside a region having $\overrightarrow{E}=2\hat{j}$ and magnetic field $5\hat{k}.$ The initial Lorentz force acting on the particle is

What is the current in a straight wire. if a magnetic field of ${10}^{-6} \mathrm{W} {\mathrm{m}}^{-2}$ is produced at a distance of $2 \mathrm{cm}$ from it?

A disc of radius $R$ rotates with a constant angular velocity $\omega$ about its own axis. Surface charge density of this disc varies as $a=\alpha r^2$ where $\text{'}r\text{'}$ is the distance from center of the disc. The magnetic field intensity at the center of the disc is

The rectangular coil of area $A$ is in a field $B.$ Find the torque about the $Z$-axis when the coil lies in the position shown and carries a current $I.$

A $100$ turns coil shown in figure carries a current of $2 \mathrm{A}$ in a magnetic field $B=0.2 \mathrm{Wb} {\mathrm{m}}^{-2}.$ The torque acting on the coil is

The total intensity of the earth's magnetic field at equator is $5$ units. What will be its value at the poles?

The earth's magnetic field at a certain place has a horizontal component $0.3 G$ and the total strength $0.5 G.$ The angle of dip is

A solenoid having $2000$ turns per meter has a core of area $4{ \mathrm{cm}}^2$ and relative permeability $220.$ It carries a current of $5 \mathrm{A}.$ The which statement among the following is true ?