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A long bar magnet has a pole strength of...

A long bar magnet has a pole strength of `10 Am`. Find the magnetic field at a point on the axis of the magnet at a distance of 5cm from the north pole of the magnet.

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To solve the problem step by step, we will follow the formula for the magnetic field due to a bar magnet at a point along its axis. ### Step 1: Identify the Given Values - Pole strength (m) = 10 Am - Distance from the north pole (d) = 5 cm = 0.05 m (conversion from cm to m) ### Step 2: Use the Formula for Magnetic Field The formula for the magnetic field (B) at a point on the axis of a long bar magnet is given by: ...
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Knowledge Check

  • A short bar magnet has a magnetic moment of 0.39 J "T"^(-1) . The magnitude and direction of the magnetic field produced by the magnet at a distance of 20 cm from the centre of the magnet on the equatorial line of the magnet is

    A
    0.049 G, N-S direction
    B
    4.95 G, S-N direction
    C
    0.0195 G, S-N direction
    D
    19.5 G, N-S direction

  • A short bar magnet has a magnetic moment of 0*48JT^-1 . Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10cm from the centre of the magnet on (i) the axis (ii) the equatorial line (normal bisector) of the magnet.

    A
    `0.48xx10^(-4)` T along N-S direction
    B
    `0.28xx10^(-4)` T along S-N direction
    C
    `0.28xx10^(-4)` T along N-S direction
    D
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