Question

An alpha particle is kept in an electric field of $15\times {10}^{4}N{C}^{-1}$. Calculate the force acting on the particle.

Answer 1

Step 1: Given

Charge of alpha particle: $q=2e$

Electric field: $E=15\times {10}^{4}N{C}^{-1}$

Step 2: Formula Used

$F=Eq$where $E$is the electric field, $q$ is the charge and $F$ is the force.

Step 3: Calculate the force acting on the particle using the formula

$$\begin{gathered} F=Eq \\ =15\times {10}^4\times 2e \\ =15\times {10}^4\times 2\times 1.6\times {10}^{-19} \\ =4.8\times {10}^{-14}N \end{gathered}$$

Hence, the force is $4.8\times {10}^{-14}N$.