Question 228: Magnetism and Matter

Question

A negative test charge is moving near a long straight wire carrying a current. The force acting on the test charge is parallel to the direction of the current. The motion of the charge is  :

Accepted Answer

Given situation is shown in the figure
As we know,
$\overrightarrow F  = q(\overrightarrow v  	imes \overrightarrow B )$
$\overrightarrow F  =  - {q_0}(\overrightarrow v  	imes \overrightarrow B )$
According to question, direction of current is parallel to the force acting on the electron. Hence, the motion of test charge is towards the wire.
![](https://app-content.cdn.examgoal.net/fly/@width/image/1kyl2xev0/ca028ecf-3aed-4c1d-9321-f76cbc6039c6/18471bc0-78e5-11ec-83c0-f7d0013bbaf7/file-1kyl2xev1.png?format=png)

Answer

away from the wire

Answer

towards the wire

Answer

parallel to the wire along the current

Answer

parallel to the wire opposite to the current

Magnetism and Matter

A negative test charge is moving near a long straight wire carrying a current. The force acting on the test charge is parallel to the direction of the current. The motion of the charge is :

Choose the correct answer: