The balance is obtained at a length

Posted on 2014-02-21 15:54:00 in Physics by YAMCHA

The balance is obtained at a length of 60 cm when the e.m.f. of standard cell used for standardisation is 1.0186 volts. Determine

1. 
   the e.m.f. of the cell which balances at 75 cm


2. 
   the current flowing a standard resistance of 2 ohms if the p.d. across it balances at 66 cm


3. 
   the voltage of a supply main which is reduced by a volt-ratio box to one hundredth and balance is obtained at 84 cm.


4. 
   The percentage error in ammeter reading 0.28 ampere when balance is balance is obtained at 40cm with potential difference across a 2.5 ? resistor in the ammeter circuit and


5. 
   The percentage error in a voltmeter reading 1.25 volts when balance is obtained at 72 cm.

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