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Charge is sprayed onto a large non conducting belt above the left hand roller. The belt carries charge with a uniform surface charge density delta, as it moves with a speed v between the rollers as shown. The charge is removed by a wiper at right hand roller. For a point just above the sheet mark the correct option. A. magnetic field is `(mu_(0)sigmav)/2` , out of the plane of the page, parallel to axis of roller.B. magnetic field is `mu_(0)sigma` , out of the plane of the page perpendicular to axisC. electric field is `(varepsilon_(0)sigma)/2` perpendicular to the plane of sheetD. If an electron moves parallel to V just above the sheet it will experience an upward magnetic force. |
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Answer» Correct Answer - A::D (A) `(mu_(0)K)/2 hence K=deltaV` (D) `F=qvec(u)xxvec(B)` hence upwards. |
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