आईओई इन्जिनियरिङ प्रवेश (त्रिवि) BE / B.Arch प्रवेश परीक्षा तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – BE / B.Arch प्रवेश परीक्षा
IOE BE / B.Arch Entrance · IOE Entrance (TU)
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
BE/B.Arch 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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Astronauts feel weightless inside a satellite orbiting the Earth because:
सही उत्तर: क) they and the satellite fall freely with the same acceleration
Gravity still acts, but the satellite and everything in it are in free fall together, so the floor exerts no normal reaction on them.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The value of the universal gravitational constant G is about:
सही उत्तर: क) 6.67 × 10⁻¹¹ N m² kg⁻²
G ≈ 6.67 × 10⁻¹¹ N m² kg⁻², a very small value, which is why gravity between everyday objects is negligible.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The gravitational field intensity at any point inside a uniform thin spherical shell is:
सही उत्तर: ख) zero
By the shell theorem, the gravitational pulls of different parts of the shell cancel everywhere inside it.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the Earth's radius were to decrease by 1% with its mass unchanged, the acceleration due to gravity on its surface would:
सही उत्तर: ग) increase by about 2%
g = GM/R², so Δg/g = −2 ΔR/R = −2(−1%) = +2%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A uniform rod of length L is pivoted at one end and released from rest in the horizontal position. Its angular velocity as it passes through the vertical position is:
सही उत्तर: ख) √(3g/L)
Loss of PE = Mg(L/2) = ½(ML²/3)ω², which gives ω² = 3g/L.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A ring rolls without slipping on a level surface. The fraction of its total kinetic energy that is translational is:
सही उत्तर: ख) 1/2
For a ring I = MR², so rotational KE ½Iω² = ½Mv² equals the translational KE; each is half of the total.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The radius of gyration of a uniform disc of radius R about its own axis (perpendicular to its plane through the centre) is:
सही उत्तर: ख) R/√2
I = ½MR² = MK², so K = R/√2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solid sphere and a hollow (thin-walled) sphere have the same mass and radius. About a diameter:
सही उत्तर: क) the hollow sphere has the larger moment of inertia
I(hollow) = (2/3)MR² is greater than I(solid) = (2/5)MR², because the hollow sphere's mass lies farther from the axis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The angular velocity of a flywheel increases uniformly from 10 rad/s to 30 rad/s in 4 s. Its angular acceleration is:
सही उत्तर: ख) 5 rad/s²
α = (ω − ω₀)/t = (30 − 10)/4 = 5 rad/s².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A body has moment of inertia I and angular momentum L about a fixed axis. Its rotational kinetic energy is:
सही उत्तर: घ) L²/(2I)
K = ½Iω² and L = Iω, so K = L²/(2I).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।