Simple Electric Motor

As we know, energy comes in various forms. One such energy is the electric energy. It can be converted to mechanical energy or useful work by machines called electric motors. The interaction between the current and the magnetic field is responsible for the working of an electric motor.

Electric Motor


  • A thin Marker
  • Electrical Tape
  • 22 G wire-insulated
  • Two sewing needles. It should be long and should be made up of metal. The eye of the needle must be large enough so that the wire could pass through.
  • A hobby Knife.
  • A Clay.
  • A Small circular management.
  • D Battery.


  • Start wrapping the insulated wire around the marker thirty times. Start from the center so that it would be easy.
  • Slide the coil off the marker.
  • Wrap the two loose ends of the wire tightly so that all the insulated wires are held together.
  • Now making use of the hobby knife, remove the top half of the wire at the free end. Rest of the wires have to remain insulated.
  • Pass each loose end of the wire through two large eyed needles. Notably, the wire should not bend. It has to be kept straight between the needles.
  • Place the D battery sideways. Place it on a flat surface.
  • Stick some modelling clay on either side of the battery so that it stays still and does not roll away.
  • Cover the sharp ends of the needle with a modelling clay.
  • Make sure that either side of the needle touches the battery terminals.
  • Make use of electric tape so the needles are secured to the end of the battery.
  • Place a magnet on the battery that is exactly at the bottom of the coil.
  • Now spin the coil.

Results / Conclusion

The simple electric motor spins when it is spun in the right direction but when it spins in opposite direction it fails to spin.

Practise This Question

A lead storage battery containing 5.0L of H2SO4 solution is operated for 9.65×105s with a steady current of 100 mA. Assuming volume of the solution remains constant, normality of H2SO4 will :