# Moving Charges And Magnetism

## An electron is projected into a magnetic field along the lines of force. Then

A
there will be no effect on its motion
B
the electron will travel along a circle and its speed remains unchanged
C
the electron will follow the path of a parabola and its speed will increase
D
the velocity will increase in magnitude but its direction will remain unchanged.
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## When a charged particle moves through a magnetic field, the quantity which is not affected in the magnetic field is:

A
particle velocity
B
particle acceleration
C
linear momentum of the particle
D
kinetic energy of the particle
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## The force felt by an electron on entering into a magnetic field is independent of its

A
Charge
B
Strength of the field
C
Mass
D
Direction of its velocity
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## When an electron moves through a magnetic field, its speed will

A
decrease.
B
increase.
C
remain the same.
D
increase first and then decrease.
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## The magnetic field due to a current element is independent of :

A
current through it
B
distance from it
C
its length
D
nature of meterial
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