CTEVT डिप्लोमा इन्जिनियरिङ प्रवेश
CTEVT डिप्लोमा इन्जिनियरिङ प्रवेश
CTEVT Diploma Engineering Entrance · १,५७१ प्रश्न
१,५७१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
डिप्लोमा 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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A step-up transformer:
सही उत्तर: क) Increases voltage
A step-up transformer has more turns in the secondary coil, so it increases voltage (and reduces current). It cannot increase power; ideally power stays the same.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A transformer works on the principle of:
सही उत्तर: घ) Electromagnetic induction
A changing current in the primary coil produces a changing magnetic flux that induces an emf in the secondary coil. That is why a transformer works only on AC, not steady DC.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The device that converts mechanical energy into electrical energy is:
सही उत्तर: ग) Generator (dynamo)
A generator works on electromagnetic induction to convert mechanical energy into electrical energy. An electric motor does the opposite.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The commercial unit of electrical energy is:
सही उत्तर: ख) Kilowatt-hour
One kilowatt-hour (1 unit) is the energy used by a 1 kW appliance in one hour and equals 3.6 × 10⁶ J. The kilowatt is a unit of power, not energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ohm's law states that, at constant temperature, current through a conductor is:
सही उत्तर: क) Directly proportional to the potential difference
Ohm's law: V = IR, so I ∝ V when temperature and other physical conditions stay constant. Resistance is the constant of proportionality.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which mirror is used as a rear-view mirror in vehicles?
सही उत्तर: घ) Convex mirror
A convex mirror always forms a small, erect, virtual image and gives a wide field of view. Concave mirrors are used in torches and as shaving mirrors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The image formed by a plane mirror is:
सही उत्तर: ग) Virtual and erect
A plane mirror forms a virtual, erect image of the same size, as far behind the mirror as the object is in front. It is also laterally inverted (left-right reversed).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A concave lens is also known as a:
सही उत्तर: क) Diverging lens
A concave lens spreads parallel rays outward, so it is diverging. A convex lens converges rays and is called a converging lens.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The splitting of white light into seven colours by a prism is called:
सही उत्तर: घ) Dispersion
Different colours have different refractive indices in glass and bend by different amounts, producing a spectrum. Violet deviates the most and red the least.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The bending of light when it passes from one medium to another is called:
सही उत्तर: ग) Refraction
Refraction occurs because light changes speed in different media. Reflection is the bouncing back of light from a surface.
💬 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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