In verifying Archimedes' principle, which of the following readings is not taken ?

Options

A. weight of the body in air
B. apparent weight of body in water
C. weight of water displaced
D. all the above readings have to be taken

Answer

To solve the question regarding which reading is not taken in verifying Archimedes' principle, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Archimedes' Principle**:
Archimedes' principle states that when an object is immersed in a fluid, it experiences a buoyant force equal to the weight of the fluid displaced by the object.

2. **Identifying the Readings Taken**:
To verify Archimedes' principle, we typically take the following readings:
- **Weight of the object in air**: This is the actual weight of the object when it is not submerged in any fluid.
- **Weight of the object in water (Apparent weight)**: This is the weight of the object when it is submerged in water. It is less than the weight in air due to the buoyant force acting on it.
- **Weight of the water displaced**: This is the weight of the water that is displaced when the object is submerged. It is equal to the buoyant force acting on the object.

3. **Analyzing the Options**:
Now, we need to analyze the options given in the question to determine which reading is not taken:
- **Option 1**: Weight of the body in air (This reading is taken.)
- **Option 2**: Apparent weight of the body in water (This reading is taken.)
- **Option 3**: Weight of water displaced (This reading is taken.)
- **Option 4**: None of the above readings are taken (This is the correct answer since all previous readings are indeed taken.)

4. **Conclusion**:
Since all the readings mentioned in options 1, 2, and 3 are taken during the verification of Archimedes' principle, the correct answer is option 4: "None of the above readings are taken."

### Final Answer:
The reading that is not taken is: **None of the above readings are taken.**

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