प्राविधिक – इलेक्ट्रिकल, मेकानिकल र टेलिकम
प्राविधिक – इलेक्ट्रिकल, मेकानिकल र टेलिकम
Technical – Electrical, Mechanical & Telecom · ४,५०० प्रश्न
४,५०० प्रश्न उपलब्ध। मोड छान्नुहोस्:
इलेक्ट्रिकल र टेलिकम: 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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Ohm's law does NOT apply to which of the following?
सही उत्तर: घ) A semiconductor diode
A diode has a non-linear V-I characteristic, so its current is not proportional to the applied voltage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of electric field strength is:
सही उत्तर: ग) volt per metre (V/m)
Electric field strength is force per unit charge (N/C), which equals volt per metre.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The electromotive force (emf) of a source is best defined as:
सही उत्तर: ग) the energy supplied by the source per unit charge passing through it
Despite its name, emf is not a force; it is the work done by the source per coulomb, measured in volts.
💬 टिप्पणी / गल्ती रिपोर्ट (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)
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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