CBSE Class 12-science Answered
An ammeter of resistance 0.6 Ω can measure current upto 1.0 A. Calculate (i) The shunt resistance required to enable the ammeter to measure current upto 5.0 A (ii) The combined resistance of the ammeter and the shunt.
Asked by Topperlearning User | 21 May, 2015, 12:53: PM
Expert Answer
R=0.6 Ω
I max=1.0 A
Shunt resistance=Rs=? so that the ammeter can measure up to 5.0 A.
For this the voltage difference across the ammeter when allowing max current =voltage difference across the (shunt+ammeter) allowing max 5.0 A current
Solving the above expression: Rs = 0.15 Ω
Shunt resistance=0.15 Ω
The combined resistance of the ammeter and the shunt =
Answered by | 21 May, 2015, 02:53: PM
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