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Magnetic Field and Field Lines

The magnetic ...

Question

The magnetic field exists around:-

A

Iron

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B

Aluminium

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C

Static charges

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D

Moving charges

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Solution

The correct option is D
Moving charges

Moving charges are the source of the magnetic field and this effect was introduced by Henry Christian Oersted.

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Q. Magnetic field of magnitude

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exist in the region above the line as shown in figure. A charged particle of mass m and charge q moving at speed 'u' enters magnetic field region. Find time interval for which particle remains in magnetic field.

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