A 50 microampere meter movement has an...

A 50 microampere meter movement has an...

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Question 1 of 20o6J1hP3rFHqGoflE80KR

A 50 microampere meter movement has an internal resistance of 2,000 ohms. What applied voltage is required to indicate half-scale deflection?

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o6J1hP3rFHqGoflE80KR

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A 50 microampere meter movement has an internal resistance of 2,000 ohms. What applied voltage is required to indicate half-scale deflection?

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🔍 Key Concepts

• Ohm’s Law: V = I × R • Relationship between full-scale and half-scale current in a meter movement • Converting microamperes (µA) to amperes (A)

💭 Think About

• What is the current through the meter at full-scale and what would it be at half-scale? • Once you know the half-scale current in amperes, how do you use the internal resistance to find the required voltage? • Are you carefully converting units from microamperes to amperes before doing the calculation?

✅ Before You Answer

• Be sure you convert 50 microamperes into amperes correctly before using Ohm’s Law • Confirm you are using half of the full-scale current, not the full 50 µA • After calculating voltage with V = I × R, compare your result with the choices and check the decimal point carefully

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