Which of the following work (s) on the principle of wheatstone Bridge?
Correct answer: D. All of these
- A. Slide-wire bridge
- B. Meter bridge
- C. Post office box
- D. All of these
- E. None of these
Explanation
The correct answer is 'All of these'. Each option - slide-wire bridge, meter bridge, and post office box - utilizes the Wheatstone Bridge principle. This principle involves balancing the ratios of resistances to find unknown values, which is a common feature in all these devices. The 'None of these' option is incorrect because it contradicts the shared underlying principle of these devices.
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