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Question
Sun February 19, 2012

Mon February 20, 2012
Actually meter bridge is based on the principle of wheetstone bridge the difference is that in meter bridge we can adjust the position of jockey to get the balance condition.

So if we cahnge the position of galvanometer and battery , the meter bridge may o.r may not be balanced because this time we will loose the luxry to move jockey because as we replace the battery with galvano meter the galvano meter have two fixed ends as battery had.

If we leave the condition of fixed end of galvanometer it will be same as theinitial condition and there is only positions change of battery and galvanometer. One can assume it easily for wheetstone bridge.

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Wed January 18, 2017

# A cell of emf E and internal resistance r is connected to two external resistance R1 and R2 and a perfect ammeter.The current in the circuit is measured in four different situation: (i)without any external resistance in the circuit (ii)with resistance R1 only (iii)with Ri and R2 in series combination (iv)with R1 and R2 in parallel combination The currents measured in the four cases are 0.42A,1.05A,1.4A and 4.2A,but not necessarily in that order.Identify the currents corresponding to the four cases mentioned above.

Thu November 24, 2016

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