PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

Book Free Demo
1. What is the role of the two conducting stationary brushes in a simple electric motor?
 
The brushes are connected to the battery and hence they  the battery and  to the armature of the coil.
  
2. What is the difference between a direct current and an alternating current? How many times does AC used in India change direction in one second?
 
Direct current always  where as the alternating current . The frequency of AC in India  is and in each cycle it alters direction . Therefore AC changes direction  times in one second.