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Question
দুইটি বস্তুর মধ্যে দূরত্ব চারগুণ বৃদ্ধি পেলে অভিকর্ষ বল হবে-
চারভাগের একভাগ
চারগুণ
ষোলভাগের একভাগ
ষোলগুণ
ANSWER : 3
Descrption
<p>আমরা জানি, <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mfrac><msub><mi>F</mi><mn>2</mn></msub><msub><mi>F</mi><mn>1</mn></msub></mfrac><mo>=</mo><msup><mfenced><mfrac><msub><mi>d</mi><mn>1</mn></msub><msub><mi>d</mi><mn>2</mn></msub></mfrac></mfenced><mn>2</mn></msup></mrow></math></p><p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mo>→</mo><msub><mi>F</mi><mn>2</mn></msub><mo>=</mo><msup><mfenced><mfrac><mn>1</mn><mn>4</mn></mfrac></mfenced><mn>2</mn></msup><mo>×</mo><msub><mi>F</mi><mn>1</mn></msub></mrow></math></p><p><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mo>→</mo><msub><mi>F</mi><mn>2</mn></msub><mo>=</mo><mfrac><mn>1</mn><mn>16</mn></mfrac><msub><mi>F</mi><mn>1</mn></msub></mrow></math></p>
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