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Moving Charges ...

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  • Question 1
    4 / -1

    Three long straight wires A, B and C are carrying currents as shown in fig. The resultant force on B is directed

  • Question 2
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    A one mettre long wire is lying at right angles to the magnetic field. A force of 1 kg wt is acting on it in a magnetic field of 0.98 tesla. The current flowing in it will be

  • Question 3
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    A galvanometer has 30 divisions and a sensitivity 16 μA/div. it can be converted in to a voltmeter to read 3 V by connecting

  • Question 4
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    A current I ampere flows in the loop having circular arc of radius r subtending an angle θ as shown in fig. the magnetic field at the Centre O of the circle is.

  • Question 5
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    A particle with specific charge s is fired with a speed υ towards a wall at a distance d, perpendicular to the wall. What minimum magnetic field must exist in this region for the particle not to hit the wall?

  • Question 6
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    Field inside a solenoid is

  • Question 7
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    A circular coil of radius R carries an electric current. The magnetic field due to the coil at a point on the axis of the coil located at a distance r from the centre of the coil, such that r >> R, varies as

  • Question 8
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    Magnetic effect of current was dicovered by

  • Question 9
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    The direction of magnetic lines of forces close to a straight conductor carrying current will be

  • Question 10
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    The distance at which the magnetic field on axis as compared to the magnetic field at the centre of the coil carrying current I and radius R is 1/8, would be

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