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Force on a Straight Current Carrying Conductor Placed in a Magnetic Field

A magnetic fi...

Question

A magnetic field exerts no force on :

(a) an electric charge moving perpendicular to its direction (b) an unmagnetised iron bar

(c) a stationary eletric charge (d) a magnet

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Solution

c) a stationary electric charge.

As we know, that magnetic field exerts force on a wire carring current. But a stationary electric charge does not feel any force as it will have properties of current only when in motion.

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