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Magnetic Effects of Electric Current
Science · CBSE Class 10 · English Medium · 20 questions and answers
Sample questions
- Q: What is a magnetic field?
- A: The region around a magnet or current-carrying conductor in which its magnetic force can be detected.
- Q: What did Oersted's experiment show?
- A: That an electric current produces a magnetic effect — a compass needle deflects near a current-carrying wire.
- Q: What are magnetic field lines?
- A: Imaginary curved lines that show the direction and strength of a magnetic field; they run from north to south outside a magnet.
- Q: Can two magnetic field lines cross each other? Why?
- A: No, because at the crossing point the field would have two directions, which is impossible.
- Q: State the right-hand thumb rule.
- A: If the thumb of the right hand points in the direction of current, the curled fingers show the direction of the magnetic field around the wire.
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