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Magnetic Effect of Electric Current
Physics · Kerala SSLC (Class 10) · English Medium · 40 questions and answers
Sample questions
- Q: What did Oersted's experiment show?
- A: Oersted's experiment showed that an electric current produces a magnetic field around it. A compass needle placed near a current-carrying wire deflects, proving that current has a magnetic effect.
- Q: What is a magnetic field?
- A: A magnetic field is the region around a magnet or a current-carrying conductor where its magnetic force can be experienced.
- Q: What is the shape of the magnetic field lines around a straight current-carrying conductor?
- A: The magnetic field lines around a straight current-carrying conductor are concentric circles with the conductor at their centre.
- Q: State the right-hand thumb rule.
- A: If a current-carrying conductor is held in the right hand with the thumb pointing in the direction of the current, the curled fingers show the direction of the magnetic field lines around the conductor.
- Q: How does the strength of the magnetic field around a wire change with current and distance?
- A: The magnetic field becomes stronger when the current increases, and it becomes weaker as the distance from the conductor increases.
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