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A particle having a mas of 10^(-2) kg carries a charge of 5 xx 10^(-8)C. The particle is given an initial horizontal velocity of 10^(5)ms^(-1) in the presence of electric . field E and magnetic field B. To keep the particle moving in a horizonmtal direction, it is necessary that 1) vecB should be perpeEdicular to the direction of velocity and vecE should be along the direction of velocity. 2) Both vecB and vecE should be along the direction of velocity 3) Both vecB and vecE are mutually perpendicular and perpendicular to the direction of velocity 4) vecB should be along the direction of velocity and vecE should be perpendicular to the direction of velocity. Which one of the following pairs of statements is possible ? |
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Answer» (2) and (4) |
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