Question

A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointing in the same direction ______

Options

• the electron will tum to its right.

• the electron will tum to its left.

• the electron velocity will increase in magnitude.

• the electron velocity will decrease in magnitude.

Answer 1

A uniform electric field and a uniform magnetic field are produced, pointed in the same direction. An electron is projected with its velocity pointing in the same direction the electron velocity will decrease in magnitude.

Explanation:

Because the electron is moving parallel to the magnetic field, the magnetic force on it is equal to zero. The only force acting on the electron is an electric force that causes it to slow down.