विज्ञान (भौतिक, रसायन, जीव) – Science MCQ
विज्ञान (भौतिक, रसायन, जीव) – CTEVT स्वास्थ्य प्रवेश
Science · CTEVT Health Entrance (PCL & Diploma) · ४११ प्रश्न
४११ प्रश्न उपलब्ध। मोड छान्नुहोस्:
विज्ञान (भौतिक, रसायन, जीव): 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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A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. Its speed is:
सही उत्तर: ग) 340 m/s
Wave speed v = fλ = 500 × 0.68 = 340 m/s. This is close to the speed of sound in air.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The weight of a body on the Moon is about ____ of its weight on the Earth.
सही उत्तर: ग) One-sixth
Gravity on the Moon is about 1/6 of that on Earth, so weight is about 1/6. The mass of the body does not change.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The value of the universal gravitational constant G is:
सही उत्तर: ख) 6.67 × 10⁻¹¹ N m²/kg²
G = 6.67 × 10⁻¹¹ N m²/kg² and is the same everywhere in the universe. 9.8 m/s² is g, the acceleration due to gravity on Earth.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The weight of a body of mass 10 kg on the Earth is (take g = 9.8 m/s²):
सही उत्तर: ख) 98 N
Weight W = mg = 10 × 9.8 = 98 N. Mass (10 kg) stays the same everywhere, but weight depends on g.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The momentum of a body of mass 5 kg moving with a velocity of 2 m/s is:
सही उत्तर: क) 10 kg m/s
Momentum p = mv = 5 × 2 = 10 kg m/s. Momentum is a vector in the direction of velocity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Newton's first law of motion is also called the:
सही उत्तर: क) Law of inertia
The first law says a body stays at rest or in uniform motion unless an external force acts, which is the property of inertia. Action-reaction is the third law.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How much heat is needed to raise the temperature of 2 kg of water by 10 °C? (specific heat capacity of water = 4200 J/kg°C)
सही उत्तर: ख) 84000 J
Q = m × s × Δθ = 2 × 4200 × 10 = 84000 J. Using only 1 kg would give 42000 J.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Heat from the Sun reaches the Earth by:
सही उत्तर: ग) Radiation
Space between the Sun and Earth is nearly a vacuum, and only radiation can transfer heat without a medium. Conduction and convection need matter.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A temperature of 27 °C is equal to:
सही उत्तर: ख) 300 K
K = °C + 273, so 27 + 273 = 300 K. 273 K is 0 °C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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At what temperature do the Celsius and Fahrenheit scales show the same reading?
सही उत्तर: क) −40°
Putting C = F in F = 9C/5 + 32 gives C = −40. So −40 °C equals −40 °F.
💬 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।