Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Permanent Magnets
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Permanent Magnets
Choose the correct statements.
Choose the correct statements.
Options
- AA north pole corresponds to a clockwise current, and a south pole corresponds to an anticlockwise current.
- BMagnetic poles are merely mathematical assumptions that have no physical existence.
- CA bar magnet is equivalent to a long, straight current.
- DA magnetic field is produced solely by electric charges.
Correct answer
B. Magnetic poles are merely mathematical assumptions that have no physical existence.
Step-by-step solution
Statement (1) is incorrect. According to the clock rule, an anticlockwise current acts as a North pole, and a clockwise current acts as a South pole.
Statement (2) is correct. Isolated magnetic poles (magnetic monopoles) do not exist in nature. They are merely mathematical assumptions used to simplify the description and calculation of magnetic fields.
Statement (3) is incorrect. A bar magnet is equivalent to a current-carrying solenoid, not a long, straight wire.
Statement (4) is incorrect. A magnetic field is produced by moving electric charges (currents) and changing electric fields, not by stationary electric charges.
Statement (2) is correct. Isolated magnetic poles (magnetic monopoles) do not exist in nature. They are merely mathematical assumptions used to simplify the description and calculation of magnetic fields.
Statement (3) is incorrect. A bar magnet is equivalent to a current-carrying solenoid, not a long, straight wire.
Statement (4) is incorrect. A magnetic field is produced by moving electric charges (currents) and changing electric fields, not by stationary electric charges.