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Particle of charge -e is moving with an initial velocity v when it enters midway between two plates where there gravitational force. The magnitude of the velocity of the particle if it just strikes the end of the plate?

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Important Questions on Magnetic Effect of Current

MEDIUM
JEE Main/Advance
IMPORTANT
In a region of space uniform electric field is present as E=E0j^ and uniform magnetic field is present as B=B0k^. An electron is released from rest at origin. Which of the following best represents the path followed by electron after release.
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JEE Main/Advance
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The charges 1,2,3 are moves in uniform transverse magnetic field then:-

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JEE Main/Advance
IMPORTANT
A charged particle moves through a magnetic field perpendicular to its direction. Then 
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JEE Main/Advance
IMPORTANT
A proton, a deuteron and an α -particle, having the same kinetic energy, are moving in circular trajectories in a constant magnetic field. If rp, rd and rα denote, respectively the radii of the trajectories of these particles, then:
EASY
JEE Main/Advance
IMPORTANT
A charged particle moves in a magnetic field B=10i^ with initial velocity u=5i^+4j^. The path of the particle will be 
HARD
JEE Main/Advance
IMPORTANT

Infinite number of straight wires each carrying current I are equally placed as shown in the figure. Adjacent wires have current in opposite direction. Net magnetic field at point P is

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MEDIUM
JEE Main/Advance
IMPORTANT
A particle of charge -16×10-18 C moving with velocity 10 m s-1 along the x-axis enters a region where a magnetic field of induction B is along the y-axis and an electric field of magnitude 104 V m-1 is along the negative z-axis. If the charged particle continues moving along the x-axis, the magnitude of B is:
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JEE Main/Advance
IMPORTANT

A current I flows a closed path in the horizontal plane of the circle as shown in the figure. The path consists of eight cars with alternating radii r and 2r. Each segment of arc subtends equal angle at the common centre P. The magnetic field produced by current path at point P is

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