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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The speed of light in vacuum is approximately:
सही उत्तर: घ) 3 × 10⁸ m/s
Light travels in vacuum at about 3 × 10⁸ m/s (3 lakh km per second).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solid body will float in water (density 1000 kg/m³) if its density is:
सही उत्तर: ग) Less than 1000 kg/m³
A body floats when its density is less than that of the liquid, because the upthrust can then balance its weight.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Archimedes' principle, the upthrust on a body immersed in a fluid is equal to:
सही उत्तर: ख) The weight of the fluid displaced
A body wholly or partly immersed in a fluid experiences an upthrust equal to the weight of the fluid it displaces.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A force of 200 N acts uniformly on an area of 0.5 m². The pressure exerted is:
सही उत्तर: क) 400 Pa
P = F/A = 200 ÷ 0.5 = 400 Pa.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The backward movement (recoil) of a gun when a bullet is fired is explained by:
सही उत्तर: घ) Newton's third law of motion
The bullet is pushed forward and, by action and reaction, the gun is pushed backward with an equal and opposite force.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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No work is done by a force when the force and the displacement are:
सही उत्तर: ग) Perpendicular to each other
W = Fd cos θ; when θ = 90°, cos θ = 0, so the work done is zero.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 5 kg object is raised to a height of 10 m. Its potential energy is (g = 10 m/s²):
सही उत्तर: ख) 500 J
PE = mgh = 5 × 10 × 10 = 500 J.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The kinetic energy of a 2 kg body moving with a velocity of 3 m/s is:
सही उत्तर: क) 9 J
KE = ½mv² = ½ × 2 × 3² = 9 J.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a mammal that lays eggs?
सही उत्तर: ग) Platypus
The duck-billed platypus is an egg-laying mammal (monotreme). The kangaroo is a pouched mammal (marsupial) that gives birth to young.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The part of the brain that maintains balance and posture of the body is the:
सही उत्तर: ग) Cerebellum
The cerebellum coordinates muscular movements and balance. The medulla oblongata controls involuntary actions like heartbeat and breathing.
💬 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।