Moving Charges And Magnetism

Physics
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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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You are sitting in a room in which uniform magnetic field is present in vertically downward direction. When an electron is projected in horizontal direction, it will be moving in circular path with constant speed

A
clockwise in vertical plane
B
clockwise in horizontal plane
C
anticlockwise in vertical plane
D
anticlockwise in horizontal plane
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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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An electron and a proton are injected into a uniform magnetic field at right angle to its direction with the same momentum. Then

A
electrons path isless curved than protons path
B
protons path will be less curved than electrons

path
C
the paths of both will be equally curved
D
both the trajectories will be straight
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An electron is not deflected on passing through a certain region, because 

A
there is magnetic field in that region and the electron enters into it in any direction.
B
there may be magnetic field but the velocity of electron may be parallel to the direction of magnetic field
C
electron is a chargeless particle 
D
there is electric field and the electron enters into it in any direction.
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Imagine that you are sitting in a room with your back to one wall and that an electron beam traveling horizontally from the back wall towards the front one is deflected towards the right. What is the direction of the magnetic induction field that exists in the room? 

A
vertically upwards
B
vertically downwards
C
horizontal and perpendicular to the direction of

motion of the electron beam
D
horizontal and parallel to the direction of motion

of the electron beam
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