कृषि, पशु र वन विज्ञान B.Sc. Ag र B.V.Sc. & A.H. प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Ag र B.V.Sc. & A.H. प्रवेश
B.Sc. Ag & B.V.Sc. Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान 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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Absolute zero temperature on the Celsius scale is:
सही उत्तर: घ) −273.15 °C
0 K = −273.15 °C, the lowest possible temperature. 0 °C is the melting point of ice (273.15 K).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A hydraulic lift (or hydraulic brake) works on the principle of:
सही उत्तर: ग) Pascal's law
Pascal's law says pressure applied to an enclosed fluid is transmitted equally in all directions, so a small force on a small piston gives a large force on a large piston.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When a glass capillary tube is dipped in mercury, the mercury level inside the tube:
सही उत्तर: ग) Falls below the outside level
Mercury does not wet glass (obtuse angle of contact), so it is depressed in the capillary. Water, which wets glass, rises instead.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Small liquid drops are spherical in shape because of:
सही उत्तर: ख) Surface tension
Surface tension tends to minimize the surface area, and a sphere has the least area for a given volume. Gravity actually flattens larger drops.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hooke's law states that, within the elastic limit:
सही उत्तर: क) Stress is directly proportional to strain
Within the elastic limit stress/strain = constant, called the modulus of elasticity (e.g. Young's modulus).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the distance between two masses is doubled, the gravitational force between them becomes:
सही उत्तर: ग) One-fourth
F ∝ 1/r², so doubling r makes F = F/4. 'Half' would be true only for an inverse (1/r) relation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A body has a mass of 60 kg on Earth. Its mass on the Moon will be:
सही उत्तर: घ) 60 kg
Mass is the quantity of matter and does not change from place to place. Only weight on the Moon becomes about one-sixth of that on Earth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The period of revolution of a geostationary satellite is:
सही उत्तर: ख) 24 hours
A geostationary satellite moves with the Earth's rotation, so its period equals one day (about 24 h) and it appears fixed above a point on the equator.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An ice skater spinning with arms outstretched pulls her arms in. Her angular speed increases because:
सही उत्तर: क) Angular momentum is conserved
With no external torque, L = Iω is constant; pulling the arms in reduces I, so ω increases. Her rotational kinetic energy actually increases (she does work).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A body of mass 1 kg moves in a circle of radius 1 m with a speed of 2 m/s. The centripetal force on it is:
सही उत्तर: ग) 4 N
F = mv²/r = 1 × 4/1 = 4 N. 2 N results from using mv/r instead of mv²/r.
💬 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।
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