Embibe Experts Solutions for Chapter: Magnetic Effects of Current and Magnetism, Exercise 1: Level 1

Two long wires each carrying a $DC$ current in the same direction are placed close to each other. Which one of the following statements is correct?

The mean radius of a toroid is $10 \mathrm{cm}$ and number of turns are $500$. If current flowing through it is $0.1$ ampere. The value of magnetic field (in Tesla) for toroid is ${10}^{-\mathrm{x}}$. Then, the value of $x$ is:-

When the number of turns in a toroidal coil is doubled, then the value of magnetic flux density will becomes

What is the magnitude of the torque in $\mathrm{N} \mathrm{m}$ acting on a solenoid which has a magnetic moment of $0.65\mathrm{ }\mathrm{J}\mathrm{ }{\mathrm{T}}^{-1}$ when its axis makes an angle of $30°$ with the direction of the applied uniform horizontal magnetic field of $0.25\mathrm{ }\mathrm{T}$?

Find the maximum torque of a loop with magnetic moment $12.5$ and flux density $4$ units.

At a place, the horizontal and vertical components of the Earth's magnetic field are equal. Find the angle (in degree) of dip at that place.

For a paramagnetic material, magnetic susceptibility changes with temperature of material. Suppose for a paramagnetic material susceptibility at $100 °\mathrm{C}$ is $353\times {10}^{-6}$. Find its susceptibility (in multiple of ${10}^{-6}$) at $80 °\mathrm{C}$

The soft iron (used as core material) has,