For a fixed angle of between a straight conductor and a uniform magnetic field

PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism

Problem

For a fixed angle of

90^{\circ}

between a straight conductor and a uniform magnetic field, a student investigates how the magnetic force varies with the current through the conductor. The length of the conductor within the field is

0.30\,\text{m}

and the magnetic field strength is

0.50\,\text{T}

. (a) Calculate the magnetic force when the current is

2.0\,\text{A}

6.0\,\text{A}

and

10.0\,\text{A}

. (b) Plot the graph of force

F

(vertical axis) against current

I

(horizontal axis) for the range

0\,\text{A}\le I\le10\,\text{A}

, using the points obtained in part (a) to guide your straight line. (c) Using the graph, determine the current required to produce a force of

0.75\,\text{N}

. Show clearly how the value is read from the graph and comment on the nature of the

F

–

I

relationship revealed by your plot.

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