question_answer

 An electric field of intensity \[6\times 104volts/m\] is applied perpendicular to the direction of motion of the electron. A magnetic field of intensity \[\text{8 }\times \text{ 1}{{0}^{-\text{2}}}\text{ wb}/{{\text{m}}^{\text{2}}}\]is applied perpendicular to both the electric field and direction of motion of the electron. What is the velocity of the electron if it passes un deflected?

A)  \[\text{7}.\text{5 }\times \text{ 1}{{0}^{\text{5}}}\text{ m}/\text{s}\]  

B)  \[\text{7}.\text{5 }\times \text{ 1}{{0}^{-\text{5}}}\text{ m}/\text{s}\]

C)  \[\text{6}\times \text{ 1}{{0}^{\text{4}}}\times \text{8 }\times \text{ l}{{\text{0}}^{-\text{2}}}\text{ m}/\text{s}\]

D)  It is never possible