An ammeter of resistance 0.81 ohm reads up to 1 A. The value of therequired shunt to increase the range to 10 A i
Question
An ammeter of resistance 0.81 ohm reads up to 1 A. The value of the required shunt to increase the range to 10 A is
Solution
To find the value of the required shunt to increase the range of the ammeter to 10 A, we need to use the formula for shunt resistance.
The formula for shunt resistance (Rs) is:
Rs = (Rm * Im) / (I - Im)
where: Rm = resistance of the ammeter = 0.81 ohm Im = maximum current the ammeter can measure = 1 A I = total current in the circuit = 10 A
Substituting the given values into the formula, we get:
Rs = (0.81 * 1) / (10 - 1) Rs = 0.81 / 9 Rs = 0.09 ohm
So, the value of the required shunt to increase the range of the ammeter to 10 A is 0.09 ohm.
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