Question

In the given diagram below, if $\text{'}x\text{'}$ is a neutral point, magnetic poles $\text{'}A\text{'}$ and $\text{'}B\text{'}$ are ______ and ______ respectively.

• A. North, South
• B. North, North
• C. South, North
• D. South, South

Answer 1

The correct option is B

North, North

1. A neutral point in a magnetic field is the point where the magnetic field is zero.
2. In a magnet, the magnetic field lines emerge from the north pole and end at the south pole.
3. So, magnetic pole A is the North pole as the magnetic field lines are emerging from A.
4. So, $\text{'}x\text{'}$ can be a neutral point only when pole B is North, if it's south there will be an attraction between two magnets.

Hence, in the given diagram, if $\text{'}x\text{'}$ is a neutral point, the magnetic poles $\text{'}A\text{'}$ and $\text{'}B\text{'}$ are North and North respectively.

The correct option is (B).