An iron nail sinks in water while an iron plate of same mass floats. Which of the following statements is a correct explanation?
An iron nail sinks in water while an iron plate of same mass floats. Which of the following statements is a correct explanation?
लोहे की कील जल में डूब जाती है जबकि समान द्रव्यमान की लोहे की प्लेट तैरती है। निम्नलिखित में से कौन सा कथन सही स्पष्टीकरण है?
Detailed Solution & Logic
The surface area of the plate is larger than the surface area of the nail./ प्लेट का पृष्ठीय क्षेत्रफल कील के पृष्ठीय क्षेत्रफल से बड़ा है।
Explanation
An iron nail sinks in water, but an iron plate of the same mass can float because of difference in surface area and buoyant force.
👉 When the plate is spread out, it displaces more water and experiences a greater upthrust (buoyant force).
👉 जब प्लेट फैली हुई होती है, तो वह अधिक पानी को विस्थापित करती है और उस पर अधिक उत्प्लावन बल (upthrust) लगता है।
👉 The nail has very small surface area, so it displaces less water and sinks.
👉 कील का पृष्ठीय क्षेत्रफल कम होता है, इसलिए वह कम पानी विस्थापित करती है और डूब जाती है।
❌ Why other options are wrong / अन्य विकल्प क्यों गलत हैं?
- Density independent → ❌ गलत (density important होती है)
- Weight of nail higher → ❌ दोनों का द्रव्यमान समान है
- Density of nail less → ❌ दोनों एक ही धातु (iron) के हैं, density समान होती है
Extra Facts / अतिरिक्त जानकारी
- 👉 This concept is based on Archimedes' Principle
- 👉 यह सिद्धांत बताता है कि किसी वस्तु पर लगने वाला उत्प्लावन बल, विस्थापित द्रव के भार के बराबर होता है
- 👉 Ships are made of iron but float because of their large surface area and hollow shape
- 👉 जहाज लोहे के बने होते हैं, फिर भी तैरते हैं क्योंकि उनका आकार बड़ा और अंदर से खोखला होता है
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