An ammeter reads upto 1 ampere. Its internal resistance is 0.81 ohm. To increase the range to 10 A the value of the required shunt is
Text Solution
Verified by ExpertsThe correct answer is:
A
To increase the range of ammeter, we have to connect a small resistance in parallel (shunt), let its
value be R.
Apply KCL at junction to divide the current.
Voltage across 
Voltage across ammeter i.e., 
or 
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