JEE Mains · Physics · STD 12 - 4. Moving charges and magnetism
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
- A away from the wire
- B towards the wire
- C parallel to the wire along the current
- D parallel to the wire opposite to the current
Answer & Solution
Correct Answer
(B) towards the wire
Step-by-step Solution
Detailed explanation
The force is parallel to the direction of current in magnetic field, hence \(\mathrm{F}=\mathrm{q}(\mathrm{v} \times \overrightarrow{\mathrm{B}})\) According to Fleming's left hand rule, we have, the direction of motion of charge is towards the wire.
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