मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
मेडिकल प्रवेश (CEE) – Physics, Chemistry, Zoology, Botany, MAT
Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · २,०३९ प्रश्न
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CEE प्रवेश: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Wien's displacement law states that:
सही उत्तर: ख) λₘT = constant
The wavelength of maximum emission is inversely proportional to absolute temperature, so hotter bodies glow bluer. E ∝ T⁴ is the Stefan–Boltzmann law.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A temperature of 300 K is equal to:
सही उत्तर: क) 27 °C
T(°C) = T(K) − 273 = 300 − 273 = 27 °C. 573 °C results from adding instead of subtracting.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Water flows at 2 m/s through a pipe of radius 2 cm. The speed in a narrower section of radius 1 cm is:
सही उत्तर: घ) 8 m/s
By continuity A₁v₁ = A₂v₂ and A ∝ r², so v₂ = 2 × (2/1)² = 8 m/s. 4 m/s results from using radius instead of area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Water rises to a height of 6 cm in a capillary tube. If the radius of the tube is halved, the water will rise to:
सही उत्तर: ग) 12 cm
Capillary rise h = 2T cosθ/(rρg), so h ∝ 1/r; halving r doubles h to 12 cm. 24 cm would follow only if h ∝ 1/r².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Stokes' law, the terminal velocity of a small sphere falling through a viscous liquid is proportional to:
सही उत्तर: ख) r²
vₜ = 2r²(ρ − σ)g/9η, so vₜ ∝ r². That is why larger raindrops fall faster.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bernoulli's theorem for a flowing ideal fluid is based on the conservation of:
सही उत्तर: क) Energy
Bernoulli's equation P + ½ρv² + ρgh = constant expresses energy conservation per unit volume. Conservation of mass gives the equation of continuity instead.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Young's modulus of a perfectly rigid body is:
सही उत्तर: घ) Infinite
Y = stress/strain, and a perfectly rigid body has zero strain for any stress, so Y is infinite. Zero would describe a body offering no resistance to deformation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The time period of a seconds pendulum is:
सही उत्तर: ग) 2 s
A seconds pendulum takes 1 s for each swing from one extreme to the other, so its full period is 2 s. Its length is about 1 m on Earth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The total energy of a particle executing SHM is proportional to:
सही उत्तर: ख) The square of the amplitude
E = ½mω²A², so E ∝ A². Doubling the amplitude quadruples the energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A mass of 1 kg attached to a spring of spring constant 100 N/m oscillates horizontally. Its angular frequency is:
सही उत्तर: क) 10 rad/s
ω = √(k/m) = √(100/1) = 10 rad/s. 100 rad/s comes from forgetting the square root.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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