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In previous question if the particles st...

In previous question if the particles started from rest and all are positively charge which particles must have been acted upon by a force other than that produced by the electric field.

A

W and Y

B

X and Z

C

X, Y and Z

D

W, X, Y and Z

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • In the previous question, if the particle is released from rest at its highest position then the tension in the road

    A
    is zero when it is vertical
    B
    is zero when it is horizontal
    C
    is zero when it is msking an angle of `cos^(-1)(2//3)` with the vertical
    D
    cannot be in any position

  • In the previous question,if the particle has -Q charge the time spend by the particle in the field will be .

    A
    `Ttheta`
    B
    `2Ttheta`
    C
    `T((pi +2theta)/(2pi))`
    D
    `T((pi -2theta)/(2pi))`

  • A particle of mass m at rest is acted upon by a force F time t. Its kinetic energy after the interval t is

    A
    2 Ftm
    B
    `(2Ft)/(m)`
    C
    `(Ft)/(m)`
    D
    `(F^2t^2)/(2m)`

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    A velocity filter uses the properties of electric and magnetic field to select particles that are moving with a specifice velocity. Charged particles with varying speeds are directed into the filter as shown. The filter consistt of an electric field E and a magnetic field B, each of constant magnitude, directed perpendicular to each other as shown, The charge particles will experience a force due to electric field given by F = qE. If positively charged particles are used, this force is towards right. The moving particle will also experience a force due to magnetic field given by F = qvB . When forces due to the two fields are of equal magnitude, the net force on the particle will be zero, the particle will pass through centre with its path unaltered. The electric and magnetic fields can be adjusted t choose the specific velocity to be filtered. The efect of gravity can be neglected. The electric and magnetic fields are adjusted to detect particles with positive charge q of certain speed v_(0) . which of the following expressions is equal to this speed?

    A particle of mass m at rest is acted upon by a force P for a time t. Its kinetic energy after an interval t is

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