Stop Solving Sphere Expansion the Hard Way | NEET 2026 PYQ

PHYSICS BY S K DWIVEDI NEET PYQ Solution: Thermal Expansion Question: The temperature of a metallic sphere of radius R is increased by a small amount ΔT. If the linear coefficient of thermal expansion of the metal is α, then the approximate increase in the volume of the sphere is: Options: (A) (4/3) π R³ α ΔT (B) 2 π R³ α ΔT (C) 4 π R³ α ΔT (D) 4 π R² α ΔT Correct Answer: (C) 4 π R³ α ΔT Solution & Explanation: Original volume of the metallic sphere of radius R, V = (4/3) π R³ Coefficient of volume expansion, γ = 3α Increase in volume, ΔV = V × γ × ΔT ΔV = [(4/3) π R³] × (3α) × ΔT 3 से 3 कैंसिल होने पर: ΔV = 4 π R³ α ΔT NEET परीक्षा में पूछे गए इस महत्वपूर्ण न्यूमेरिकल का आसान और स्टेप-बाय-स्टेप समाधान इस वीडियो में देखें। For any queries, guidance, or admission details: Contact Number: 9981933791 Channel: PHYSICS BY S K DWIVEDI \#NEET \#NEET2026 \#Physics \#ThermalExpansion \#NEETPYQ \#PhysicsBySKDwivedi \#Class11Physics