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Magnetic Effects of Electric Current — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMagnetic Effects of Electric Current1 Mark
MCQ
A coil carries a current in a magnetic field. The coil experiences a turning effect. Which device uses this effect?
  • ✓
    A $\text{d.c}$ motor
  • B
    An electromagnet
  • C
    A relay
  • D
    A transformer
✓

Answer

Correct option: A.
A $\text{d.c}$ motor
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. So, it must be a $\text{d.c}$. motor.

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