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3. A simple shunted dc ammeter, using a basic meter movement with an internal resistance, R ==== 1,800 2, and a full-scale deflection current, Irsd = 100 μA, is connected into a circuit and gives a reading of 3.5 mA on its 5-mA range. This reading is checked by a recently calibrated dc ammeter which gives a reading of 4.1 mA. The implication is that the first ammeter has a faulty shunt on its 5-mA range. Calculate (a) the actual value of the faulty shunt; (b) the correct shunt for the 5-mA range.

3. A simple shunted dc ammeter, using a basic meter movement with an internal resistance, R ==== 1,800 2, and a full-scale deflection current, Irsd = 100 μA, is connected into a circuit and gives a reading of 3.5 mA on its 5-mA range. This reading is checked by a recently calibrated dc ammeter which gives a reading of 4.1 mA. The implication is that the first ammeter has a faulty shunt on its 5-mA range. Calculate (a) the actual value of the faulty shunt; (b) the correct shunt for the 5-mA range.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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3. A simple shunted dc ammeter, using a basic meter movement with an internal resistance, R ==== 1,800 2, and a full-scale deflection current, Irsd = 100 μA, is connected into a circuit and gives a reading of 3.5 mA on its 5-mA range. This reading is checked by a recently calibrated dc ammeter which gives a reading of 4.1 mA. The implication is that the first ammeter has a faulty shunt on its 5-mA range. Calculate (a) the actual value of the faulty shunt; (b) the correct shunt for the 5-mA range.
Transcribed Image Text:3. A simple shunted dc ammeter, using a basic meter movement with an internal resistance, R ==== 1,800 2, and a full-scale deflection current, Irsd = 100 μA, is connected into a circuit and gives a reading of 3.5 mA on its 5-mA range. This reading is checked by a recently calibrated dc ammeter which gives a reading of 4.1 mA. The implication is that the first ammeter has a faulty shunt on its 5-mA range. Calculate (a) the actual value of the faulty shunt; (b) the correct shunt for the 5-mA range.
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