A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the dir

Question

A uniform electric field and a uniform magnetic field are acting along the same direction in a certain region. If an electron is projected in the region such that its velocity is pointed along the direction of fields, then the electronNEET 2023 (Manipur)

TestHub · Accepted Answer

Given condition is shown in figure
Force due to magnetic field is given by $F_{m} = q v B sin θ$ Here $θ = 0 \Rightarrow F_{m} = 0$ Force due to electric field is $F_{e} = q E$ Here, $F_{e} = - e E$ $∴$ Force due to electric field will be opposite to the direction of motion. Hence its speed will decrease.

Physics - Magnetism Question with Solution | TestHub

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