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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
Choose the incorrect statement.
  • A
    Fleming's right hand rule is a simple rule to know the direction of induced current.
  • ✓
    The right hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors.
  • C
    The difference between the direct and alternating currents is that the direct current always flows in one direction, where as the alternating current reverses its direction periodically.
  • D
    In India, the $AC$ changes direction after every $1/50$ second.
✓

Answer

Correct option: B.
The right hand thumb rule is used to find the direction of magnetic fields due to current carrying conductors.
Right hand thumb rule : When holding the current $-$ carrying straight conductor in your right hand such that the thumb points towards the direction of the current, the finger of the right hand wraps around the conductor in the direction of the field lines of the magnetic field.

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