आधारभूत विद्युत् (Basic Electrical) – Basic Electrical Engineering MCQ
आधारभूत विद्युत् (Basic Electrical) – इलेक्ट्रिकल र टेलिकम
Basic Electrical Engineering · Technical – Electrical, Mechanical & Telecom · २,२९९ प्रश्न
२,२९९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
आधारभूत विद्युत् (Basic Electrical): 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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One volt is equal to:
सही उत्तर: ग) one joule per coulomb
Potential difference is energy per unit charge, so 1 V = 1 J/C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Hall effect is the production of a voltage across a current-carrying conductor when it is placed in:
सही उत्तर: घ) a magnetic field perpendicular to the current
The magnetic force deflects charge carriers sideways, creating the Hall voltage used in sensors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A solar photovoltaic cell converts:
सही उत्तर: क) light energy directly into electrical energy
PV cells use semiconductor junctions to produce current when exposed to light.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A thermocouple produces an emf when its two junctions are at different temperatures. This is known as the:
सही उत्तर: ख) Seebeck effect
The Seebeck effect converts a temperature difference directly into a voltage; the Peltier effect is the reverse.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Faraday's first law of electrolysis states that the mass of substance deposited at an electrode is proportional to:
सही उत्तर: ग) the quantity of charge passed through the electrolyte
m = Z I t, where Z is the electrochemical equivalent and I t is the charge.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Illuminance (illumination) on a surface is measured in:
सही उत्तर: ख) lux
1 lux = 1 lumen per square metre.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of luminous flux is the:
सही उत्तर: ख) lumen
Luminous flux is measured in lumens; illuminance (lumens per square metre) is measured in lux.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistance of an earthing system should be:
सही उत्तर: ख) as low as possible
Low earth resistance allows fault current to flow easily so that protective devices operate quickly.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Earthing electrodes made by burying a metal plate (e.g. copper or GI) vertically in a pit with charcoal and salt is called:
सही उत्तर: घ) plate earthing
In plate earthing a copper or GI plate is buried with alternate layers of charcoal and salt to keep earth resistance low.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The first thing to do when rescuing a person who is in contact with a live conductor is to:
सही उत्तर: घ) switch off the supply or separate the person using a dry non-conducting object
The rescuer must break the contact safely first to avoid becoming a victim too.
💬 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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