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In a practical wheat stone bridge circuit as shown, when one more resistance of 100 W is connected is parallel with unknown resistance ' x ', then ratio l subscript 1 end subscript1 l subscript 2 end subscriptbecome ' 2 '. l1 is balance length. AB is a uniform wire. Then value of ' x ' must be:

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  1. 50 W    
  2. 200 W    
  3. 400 W    
  4. 100 W    

    Answer:The correct answer is: 100 Wwheat stone bridge is in balanced condition

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