The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3 × 10 3   A / m . The current required to be passed in a solenoid of length 10   cm and number of turns 100 , so that the magnet gets demagnetised when inside the solenoid is

Question

The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3 &#215; 10 3 &#160; A / m . The current required to be passed in a solenoid of length 10 &#160; cm and number of turns 100 , so that the magnet gets demagnetised when inside the solenoid is

Aicharya · Accepted Answer

For solenoid, the magnetic field needed to be magnetised the magnet.

$B = μ_{0} n I$

where, $n = 100, l = 10 cm = \frac{10}{100} m = 0.1 m$

$\Rightarrow 3 \times 10^{3} = \frac{100}{0.1} \times I$

$\Rightarrow I = 3 A$

The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3 × 10 3   A / m .…

Solution

The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3 &#215; 10 3 &#160; A / m .…

Solution

The coercivity of a small magnet, where the ferromagnet gets demagnetised is 3 × 10 3 A / m .…