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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When two blocks of ice are pressed firmly together and the pressure is then released, they join into one block. This phenomenon is called:
सही उत्तर: ख) regelation
Pressure lowers the melting point of ice, so ice at the contact melts; when the pressure is removed the water refreezes and joins the blocks (regelation).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A faulty thermometer reads 5° at the ice point and 95° at the steam point. When it reads 59°, the true temperature is:
सही उत्तर: घ) 60 °C
True T = (reading − 5)/(95 − 5) × 100 = 54/90 × 100 = 60 °C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A clinical thermometer has a narrow constriction (kink) in its capillary just above the bulb. Its purpose is to:
सही उत्तर: क) prevent the mercury thread from falling back on its own so the reading is retained
The kink breaks the mercury thread when the thermometer is removed from the body, so the maximum reading stays until the thermometer is shaken.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The excess pressure inside an air bubble of radius 1 mm just below the surface of water (surface tension 0.07 N/m) is:
सही उत्तर: ग) 140 Pa
An air bubble in a liquid has one free surface, so ΔP = 2T/r = 2 × 0.07/10⁻³ = 140 Pa.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The maximum length of a uniform wire that can hang vertically without breaking under its own weight depends on:
सही उत्तर: क) the breaking stress and density of its material
At the top, stress = weight/area = (ALρg)/A = Lρg; breaking occurs when Lρg = breaking stress, so L_max = breaking stress/(ρg), independent of area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A wire is stretched by a load. If both its length and its radius are doubled (same material, same load), the extension becomes:
सही उत्तर: ख) half
ΔL = FL/(πr²Y); doubling L doubles it and doubling r divides it by 4, so ΔL becomes 2/4 = 1/2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the amplitude of a particle in SHM is tripled and its frequency is doubled, its total energy becomes:
सही उत्तर: ख) 36 times
E = ½mω²A² ∝ f²A², so the energy becomes 2² × 3² = 36 times.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A particle performs SHM with a period of 2 s and an amplitude of 10 cm. Its maximum acceleration is about:
सही उत्तर: ग) 0.99 m/s²
ω = 2π/T = π rad/s; a_max = ω²A = π² × 0.1 ≈ 0.99 m/s².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Masses of 1 kg and 3 kg are placed on the x-axis at x = 0 and x = 4 m respectively. The centre of mass of the system is at:
सही उत्तर: ख) x = 3 m
x_cm = (1 × 0 + 3 × 4)/(1 + 3) = 12/4 = 3 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A car engine delivers a power of 30 kW while the car moves at a steady 20 m/s. The driving force provided by the engine is:
सही उत्तर: ग) 1500 N
P = Fv, so F = P/v = 30000/20 = 1500 N.
💬 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।
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