Question 219: 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.

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: