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Question: Electrons in a TV tube move horizontally South to North. Vertical component of earth’s magnetic fiel...

Electrons in a TV tube move horizontally South to North. Vertical component of earth’s magnetic field points down. The electron is deflected towards

A

West

B

No deflection

C

East

D

North to South

Answer

East

Explanation

Solution

F = q(v→×B→)\left( \overrightarrow{v} \times \overrightarrow{B} \right) = - e(j^×−k^)\left( \widehat{j} \times - \widehat{k} \right) = i^\widehat{i}e