Magnetic Effects of Electric Current — Class 10 Science MCQs

NCERT | CBSE Curriculum

Practice 100+ MCQs on Magnetic Effects of Electric Current for Class 10.
Learn about Magnetic field lines, force on conductor, electromagnetic induction, motors & generators.
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Quick Revision: Magnetic Effects of Electric Current

  • Oersted's Experiment: A current-carrying conductor produces a magnetic field around it.
  • Magnetic Field Lines: Imaginary lines; emerge from North pole, merge at South pole; never intersect.
  • Right-Hand Thumb Rule: Thumb = current direction; curled fingers = magnetic field direction.
  • Magnetic Field due to Solenoid: Behaves like a bar magnet; strong, uniform field inside.
  • Electromagnet: Soft iron core inside a current-carrying solenoid.
  • Fleming's Left-Hand Rule: Forefinger = Field, Middle finger = Current, Thumb = Force.
  • Electric Motor: Converts electrical to mechanical energy; uses split-ring commutator.
  • Electromagnetic Induction: Induced current due to changing magnetic field.
  • Fleming's Right-Hand Rule: Thumb = Motion, Forefinger = Field, Middle finger = Induced Current.
  • Electric Generator: Converts mechanical to electrical energy; AC has slip rings, DC has commutator.
  • Domestic Circuits: Live (red), neutral (black), earth (green); fuses for safety.

External Resources: Byjus - Magnetic Effects | Khan Academy - Magnetism

Chapter Summary: Magnetic Effects of Electric Current

Magnetic Effects of Electric Current MCQ Class 10 explores the deep connection between electricity and magnetism. We begin with how an electric current creates a magnetic field (Oersted's discovery) and learn to determine its direction using the Right-Hand Thumb Rule. We study the magnetic fields produced by straight wires, circular loops, and solenoids.

We then learn about the force on a current-carrying conductor in a magnetic field (Fleming's Left-Hand Rule) and its application in devices like the electric motor. The reverse phenomenon—how a moving magnet can generate electricity (electromagnetic induction)—is covered next, along with Fleming's Right-Hand Rule and the working of AC/DC generators. Finally, we understand the safety aspects of domestic electric circuits.

This high-scoring chapter combines diagram-based questions, rule-based applications, and numerical problems. Regular practice builds confidence in tackling conceptual, numerical, and application-based questions.