The coercivity of a small magnet where t...

The coercivity of a small magnet where the ferromagnet gets demagnetised is `3xx10^(3)A.m^(-1)` The current required to be passed in a solenoid of length 10cm and number of turns 100 so that the magnet gets demagnetised when inside the solenoid is

`30mA`

`60mA`

`3A`

`6A`

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The coercitivity of a small magnet where the ferromagnet gets demagnetized is 3 xx 10^(3) Am^(-1) . The current required to be passed in a solenoid of length 10 cm and number of turns 100 , so that the magnet gets demagnetized when inside the solenoid , is :

A current of 2 A flows in an air core solenoid of length 1 m and number of turns 1000. What is the magnetic flux density inside the solenoid?

A thin solenoid of length 0.4 m and having 500 turns of wire carries a current 1A ,then find the magnetic field on the axis inside the solenoid.

The coercivity of a certain permanent magnet is 4.0xx10^(4)Am^(-1) . The magnet is placed insider a solenoid 20cm long having 700 turns and a current is passed in the solenoid to demagnetise it completely. Find the current

The coercivity of a bar magnet is 120A//m . It is to be demagnetised by placing it inside a solenoid of length 120cm and number of turns 72. The current (in A) flowing through the solenoid is:

The coercivity of a certain permanent magnet is 4*0xx10^4Am^-1 . This magnet is placed inside a solenoid 15cm long and having 600turns . Calculate the current required to demagnetise the magnet completely.

There is a magnetic material of coercitivy 2xx10^(3)Am^(-1) . What current should flow through solenoid of length 15 cm having 150 turns to demagnetise the substance completely?

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