Identify the instrument/s which is/are used for the measurement of resistance:I. Wheatstone BridgeII. Meter BridgeIII. Post office BoxIV. Ohmmeter
Correct answer: E. I, II, III, and IV
- A. I only
- B. I and II only
- C. II and III only
- D. III and IV only
- E. I, II, III, and IV
Explanation
All of the instruments listed-Wheatstone Bridge, Meter Bridge, Post Office Box, and Ohmmeter-are used for measuring resistance:Wheatstone Bridge: Measures resistance by balancing two legs of a bridge circuit.Meter Bridge: Functions similarly to a Wheatstone Bridge and is often used in educational settings for practical demonstrations.Post Office Box: A form of the Wheatstone Bridge designed for precision resistance measurements.Ohmmeter: Directly measures electrical resistance and is commonly used in various applications.Each tool has its own specific applications and advantages, making them all valid for this purpose. The other options are incorrect because they exclude one or more instruments that can also measure resistance.
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