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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A 10 V source with a 2 Ω series resistor feeds node X. From X to ground are a 4 Ω resistor and a dependent current source drawing 0.25·Vₓ amperes (Vₓ = voltage of node X). The node voltage Vₓ is:
सही उत्तर: घ) 5 V
KCL at X: (10 − Vₓ)/2 = Vₓ/4 + 0.25Vₓ, so 5 = Vₓ(0.5 + 0.25 + 0.25), giving Vₓ = 5 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An electric fuse works on the principle of:
सही उत्तर: घ) the heating effect of current
Excess current heats the fuse element (I²R) until it melts and opens the circuit.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of electric flux density (displacement) D is:
सही उत्तर: ख) coulomb per square metre
D = εE has units of charge per area, C/m²; V/m and N/C are units of E, and F/m of permittivity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of admittance, conductance and susceptance is the:
सही उत्तर: ग) siemens
All three are reciprocals of ohm-type quantities and are measured in siemens (S).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The average value over one full cycle of the current i = 5 + 10 sin ωt (A) is:
सही उत्तर: क) 5 A
The sinusoidal part averages to zero over a full cycle, leaving the DC component 5 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistivity of a conductor depends on:
सही उत्तर: ग) its material and temperature
Resistivity is a property of the material (and varies with temperature); resistance, not resistivity, depends on length and area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ohm's law (V ∝ I) holds for a metallic conductor provided that:
सही उत्तर: घ) its temperature and other physical conditions remain constant
The resistance of a metal changes with temperature, so V/I stays constant only when physical conditions are unchanged.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A device that converts DC from a battery into AC to run household appliances is called:
सही उत्तर: क) an inverter
An inverter produces AC from DC; a rectifier does the opposite.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The capacity of a storage battery is usually expressed in:
सही उत्तर: ख) ampere-hours (Ah)
Capacity is the charge a battery can deliver, rated in ampere-hours at a stated discharge rate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An open circuit between two terminals has:
सही उत्तर: क) infinite resistance and zero current
An open circuit is a break in the path, so no current can flow however large the voltage across the gap.
💬 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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