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a galavano meter having resistance of 50 ohm gives full scale deflection for a current of 0.05 A the length in the meter of a resistance wire of area of croos section 0.00297 that can be used to convert the galavanometer in to ammeter which can read maximum 5A current is(specific resistance of wire 5*10^-7)

nahas

9 Years agoGrade 12th pass

2 Answers

Jhashank Dadhich

8 Years ago

For ammeter setup formed using galvanometer

(i - ig) Rs = (ig) ×(Rg)

(5 - 0.05)Rs = 0.05×50

So Rs = 0.50 =( rho) L/A

(5*10^-7)(L)/0.00297 = 0.50

So L = 2.97*10^-11

Here

Rs = shunt resistor

Rg = resistance of galvanometer

ig = current in galvanometer

i = total current given

Jhashank Dadhich

8 Years ago

You must provide units of all measurements.

IT is not a correct question. So please provide units also.

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