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A wheel having mass m has charges +q and...

A wheel having mass m has charges +q and –q on diametrically opposite points. It remains in equilibrium on a rough inclined plane in the presence of uniform vertical electric field E =

A

`(mg)/(q)`

B

`(mg)/(2q)`

C

`(mgtantheta)/(2q)`

D

none

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A wheel having mass m has charges +q and -q on dimetrically opposite points. It remains in equilibrium on a among inclined plane in the presence of a vertical electric field E. Then value of E is

    A
    `(mg tan theta)/(q)`
    B
    `(mg)/(q)`
    C
    `(mg)/(2q)`
    D
    `(mg tan theta)/(2q)`

  • Two point charge +q and -q are fixed on diameterically opposite point on the unirom ring, such that -q is at bottom and is contact will a perfect insulator incline plane. Total mass is equal to m remains in equilibrium on the rough inclined plane in the presence of uniform vertical electric field. Then

    A
    the value of friction force is `mg sin theta`
    B
    the value of friction force is less than `mg sin theta`
    C
    the value of electric field is `(mg)/(2q)`
    D
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  • Force vec(F) acting on a test charge q_(0) in a uniform electric field vec(E) is

    A
    `vec(F) = q_(0) vec(E)`
    B
    `vec(F) = (vec(E))/(q_(0))`
    C
    `vec(F) = (q_(0))/(vec(E))`
    D
    `vec(F) = q_(0)^(2) vec(E)`

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