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in Current Electricity by (26.1k points)
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You are supplied with a 1m long uniform resistance wire of resistance 3Ω and a cell of emf 1.5v.

1. Can you construct a potentiometer using 1m wire? If no, give reason; if yes, what is the least count of the arrangement?

2. Draw the connection diagram to compare the emf of Leclanche cell and Daniel cell using this arrangement.

3. How can you modify above arrangement to measure a p.d. in the range 0-1 mV with a least count of 0.15 m V.

1 Answer

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by (26.7k points)
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Best answer

1. Yes, LC is 1.5 mV

2. 

3. To get least count of 0.15 mV, 10 m wire has to be used.

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