ICSE Class 10: Ohm's Law Videos | Current Electricity

• Practically,why does current decrease if length of conductor increases?
• Find the magnitude of current through the 4\OmegaΩ resistor in the circuit shown. 
• Find the resistance between A and B.
  
• calculate the resistance of 1km long copper wire of radius 1mm
• what is ohm law ?  
• exercise 8a numerical 12
  
• exercise 8A numerical 10
• exercise 8a numerical 8
  
• exercise 8a numerical 8
  
• I had a query in th following question: A given wire of resistece is stretched to double its length. What will be its new resistance? How come the answer is 4 ?

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