भौतिक विज्ञान – Physics MCQ
भौतिक विज्ञान – IT प्रवेश
Physics · IT Entrance – B.Sc. CSIT, BIT & BCA · ४०३ प्रश्न
४०३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
भौतिक विज्ञान: 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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The audible range of frequencies for a normal human ear is approximately:
सही उत्तर: घ) 20 Hz to 20 kHz
Humans normally hear sounds from about 20 Hz to 20,000 Hz.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The sea breeze that blows from sea to land during the day is an example of heat transfer by:
सही उत्तर: घ) convection
Land heats faster, warm air over it rises and cooler air from the sea flows in: a convection current.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For an isotropic solid, the coefficient of superficial (area) expansion β and the coefficient of linear expansion α are related by:
सही उत्तर: क) β = 2α
Area A = A₀(1 + αΔT)² ≈ A₀(1 + 2αΔT), so β = 2α.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In an adiabatic process:
सही उत्तर: ख) no heat enters or leaves the system
Adiabatic means Q = 0; temperature, pressure and volume may all change.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The normal human body temperature of 98.6 °F is equal to:
सही उत्तर: ग) 37 °C
C = (F − 32) × 5/9 = (98.6 − 32) × 5/9 = 37 °C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Small rain drops and mercury droplets are nearly spherical because of:
सही उत्तर: ग) surface tension
Surface tension minimises surface area, and a sphere has the least surface area for a given volume.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of the coefficient of viscosity is:
सही उत्तर: ख) Pa s
From F = ηA(dv/dx), η has units N s/m² = Pa s (also called poiseuille).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The working of a hydraulic lift (or hydraulic brake) is based on:
सही उत्तर: घ) Pascal's law
Pascal's law: pressure applied to an enclosed fluid is transmitted equally in all directions, which allows force multiplication.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A person has a mass of 60 kg. Taking g on the Moon as one-sixth of 9.8 m/s², his weight on the Moon is about:
सही उत्तर: घ) 98 N
W = m(g/6) = 60 × 9.8/6 = 98 N; mass stays 60 kg.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Kepler's first law, the planets move around the Sun in:
सही उत्तर: क) elliptical orbits with the Sun at one focus
Kepler's law of orbits: each planet moves in an ellipse with the Sun at one of its foci.
💬 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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