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Class 12
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Physics
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Moving Charges and Magnetism
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Motion of Charged Particle Combined in Magnetic Field and Electric Fields
Motion of Charged Particle Combined in Magnetic Field and Electric Fields
Revise with Concepts
Motion in the Presence of Electric and Magnetic Field
Example
Definitions
Formulaes
>
Cyclotron
Example
Definitions
Formulaes
>
Learn with Videos
Force on a moving charge in magnetic and electric fields
13 mins
Construction, Working and Application of a Cyclotron - I
16 mins
Construction, Working and Application of a Cyclotron - II
2 mins
Quick Summary With Stories
Motion in the Presence of Electric and Magnetic Field
2 mins
Application and Limitations of a Cyclotron
3 mins
Important Questions
A charged particle enters at right angles into a uniform magnetic field as shown:
What should be the nature of charge on the particle if it begins to move in a direction pointing vertically out of the page due to its interaction with the magnetic field?
Medium
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When a proton is released from rest in room, it starts with an initial acceleration
a
0
towards west When it is projected towards north with a speed
V
0
it moves with an initial acceleration
3
a
0
towards west. The electric and magnetic fields in the room are :
Hard
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>
A proton and an
α
-particle enter a uniform magnetic field perpendicularly with the same speed. If proton takes 25
μ
second to make 5 revolutions, then times period for the
α
-particle would be
Medium
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>
A particle of charge
q
and mass
m
starts moving from the origin under the action of an electric field
E
=
E
o
i
^
and
B
=
B
0
i
^
with a velocity
v
=
v
0
j
^
. The speed of the particle will become
2
v
0
after a time
Hard
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>
A beam of protons with a velocity
4
×
1
0
5
m
s
−
1
enters a uniform magnetic field of 0.3 T at an angle of
6
0
o
to the magnetic field. Find the pitch of the helix (which is the distance travelled by a proton in the beam parallel to the magnetic field during one period of the rotation). Mass of the proton
=
1
.
6
7
×
1
0
−
2
7
k
g
Medium
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>
A charged particle enters into a uniform magnetic field with velocity vector at an angle of
4
5
o
with the magnetic field. The pitch of the helical path followed by the particle is
p
. The radius of the helix will be
Medium
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>
The time period of the charged particle in cyclotron is
T
and maximum speed is
V
, then
Medium
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>
An electron is moving in a circular path under the influence of a transverse magnetic field of
3
⋅
5
7
×
1
0
−
2
T
. If the value of e/m is
1
⋅
7
6
×
1
0
1
1
C/kgg. the frequency of revolution of the electron is.
Medium
NEET
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>
This section contains multiple choice questions. Each question has 4 choices (a), (b), (c) and (d ) out of which ONE OR MORE may be correct.
A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E and B represent the electric and magnetic fields respectively, Identify which of the following options can be true for the space.
This question has multiple correct options
Medium
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In a cyclotron, a charged particle
Medium
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>