Question

Which one of the following statement is INCORRECT?

• A. Isolated magnetic poles do not exist
• B. Magnetic field lines do not intersect
• C. Moving charges do not produce magnetic field in the surrounding space
• D. Magnetic field lines always form closed loops
• E. Magnetic force on a negative charge is opposite to that on a positive charge

Hint:

Remember that moving charges (currents) create magnetic fields. This is a key concept in electromagnetism that is important for understanding how motors, generators, and many other devices work.

Answer 1

The Correct Option is C

The given statements are based on fundamental properties of magnetism. Let's analyze each statement:
- Statement (A): "Isolated magnetic poles do not exist." This statement is true because all magnetic poles are found in pairs (north and south).
- Statement (B): "Magnetic field lines do not intersect." This statement is true as magnetic field lines never intersect at any point, because the magnetic field has a unique direction at each point.
- Statement (C): "Moving charges do not produce magnetic field in the surrounding space." This statement is incorrect because moving charges (currents) do produce a magnetic field in the surrounding space, as described by Ampere's law.
- Statement (D): "Magnetic field lines always form closed loops." This statement is true. Magnetic field lines form closed loops, as the field lines emerge from the north pole and enter the south pole.
- Statement (E): "Magnetic force on a negative charge is opposite to that on a positive charge." This statement is true because the direction of the magnetic force is opposite for negative and positive charges, as the force is determined by the charge's sign.
Thus, the incorrect statement is (C).