Why are external shunts sometimes used with...

Why are external shunts sometimes used with...

Question 1 of 2921866636ef128f7522a1c52345c

Why are external shunts sometimes used with ammeters?

Question 1 of 29218

Q

Why are external shunts sometimes used with ammeters?

🔍 Key Concepts

• Ammeter operating limits (how much current the meter movement itself can safely carry) • Shunt resistor function (how placing a low-value resistor in parallel affects current flow) • Difference between sensitivity of a meter and maximum measurable current

💭 Think About

• Think about what happens to current distribution when you place a low-resistance path in parallel with the ammeter movement. • Which option describes a situation where most of the current bypasses the delicate meter movement but the meter can still indicate the total current? • Ask yourself: is a shunt used to change accuracy/sensitivity, to change power factor, or to protect the meter movement while allowing larger circuit currents?

✅ Before You Answer

• Verify which choice directly involves current magnitude relative to the meter’s rating. • Eliminate any choices that deal with reactive power factor—is that normally associated with a simple DC ammeter circuit? • Decide whether a shunt in parallel would increase or decrease the overall resistance seen by the circuit, and how that relates to the meter’s safe operating current.