Question

Which of these equations is the correct expression for force on a charge in magnetic field?

Options

• `vec"F" = "q"vec"v" xx 2vec"B"`

• `vec"F" = 3"q"vec"v" xx vec"B"`

• `vec"F" = "q"^2(vec"v" xx vec"B")`

• `vec"F" = "q"(vec"v" xx vec"B")`

Answer 1

`vec"F" = "q"(vec"v" xx vec"B")`

Explanation:

A charged particle moving in a magnetic field experiences magnetic Lorentz force given by `vec"F" = "q"(vec"v" xx vec"B")`.