An electric heater works both in A.C. and D.C. lines but Barlow's wheel works only in D.C. -
Why?
Answers
Answer:
A DC electric current passes from the hub of the wheel, through the wheel into the mercury and out through an electrical contact dipping into the mercury. ... Hence the direction of the rotation will not be changed by reversing that of the current; since the polarity of the electromagnet will also be reversed."
Explanation:
please give brainlist
Answer:
generation of heat in a resistor due to the current depend on magnitude of the current not in its direction. Moreover the heat produced (H) is directly proportional to the square of the strength of the current (I) so even oppositely directed current of ACB taken with negative direction on the squared it becomes positive. solar heater can work both in AC and DC.
where does the rotation of the barlow's wheel in a given magnetic field depends upon the direction of the current. the direction of rotation will reverse its direction of current is he was keeping the direction of the magnetic field.
now in AC the direction of the current reverse is alternatively and so frequency that as soon as bye laws will set to rotate in one direction the rivers current flows into it tending to rotate it oppositely this happens continuously and very frequently so the wheel remain static.