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A beam of protons is sent in the positive x-direction (toward the right) into a region with a uniform magnetic field [tex]B[/tex] of 2 T in the positive z-direction (out of the page) and a uniform electric field [tex]E[/tex] of 100 N/C.

What should be the speed of the protons and the direction of the electric field so that the protons are not deflected?

Use the equation [tex]qVB = qE[/tex] to explain how the protons can avoid deflection. Substitute values to demonstrate your solution.

**Answer**: The speed of the protons should be 50 m/s, and the electric field [tex]E[/tex] should be in the positive y-direction (upward).

Answer :

Final answer:

To prevent deflection of the protons, the speed of the protons should be 50 m/s and the electric field should be in the positive y-direction.

Explanation:

To ensure that the protons are not deflected, the electric force and the magnetic force acting on the protons must be equal and opposite to each other. Using the equation qVB = qE, we can equate the magnitudes of the electric force and the magnetic force. Since the electric field is in the positive y-direction, the velocity of the protons must be in the positive x-direction. By substituting the given values and solving the equation, we find that the speed of the protons should be 50 m/s and the electric field should be in the positive y-direction.

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