Embibe Experts Solutions for Chapter: Matter and Magnetism, Exercise 1: KCET (UG) 2021

In a permanent magnet at room temperature

Which of the field pattern given below is valid for electric field as well as for magnetic field?

The strength of the Earth’s magnetic field is

A paramagnetic sample shows a net magnetization of $8 {\mathrm{Am}}^{-1}$ when placed in an external magnetic field of $0.6 \mathrm{T}$ at a temperature of $4 \mathrm{K}$. When the same sample is placed in an external magnetic field of $0.2 \mathrm{T}$ at a temperature of $16 \mathrm{K}$. The magnetization will be

Coercivity of a magnet where the ferromagnet gets completely demagnetized is $3\times {10}^3{\mathrm{Am}}^{-1}$. The minimum current required to be passed in a solenoid having $1000$ turns per metre, so that the magnet gets completely demagnetized when placed inside the solenoid is

Needles $N_1,N_2$ and $N_3$ are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet, when brought close to them, will