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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The SI unit of magnetomotive force (mmf) is the:
सही उत्तर: ख) ampere (ampere-turn)
mmf = NI, so its unit is the ampere, often written as ampere-turn (AT).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The energy stored in a charged capacitor resides in:
सही उत्तर: ख) the electric field between its plates
A capacitor stores energy ½CV² in the electric field of its dielectric; an inductor stores energy in a magnetic field.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The internal resistance of an ideal ammeter is:
सही उत्तर: ख) zero
An ideal ammeter is inserted in series without dropping any voltage or changing the current, so its resistance is zero.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Household appliances are connected in parallel mainly because:
सही उत्तर: ग) each gets the full supply voltage and can be switched independently
In parallel every branch has the full supply voltage, and switching one branch off does not affect the others.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Several lamps are connected in series across a supply. If one lamp's filament breaks:
सही उत्तर: ख) all the lamps go off
A series circuit has only one current path, so an open filament stops the current through every lamp.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reactance of an inductor or a capacitor is measured in:
सही उत्तर: घ) ohm
Reactance is a voltage-to-current ratio, like resistance, so it is measured in ohms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is NOT a unit of power?
सही उत्तर: क) kilowatt-hour
The kilowatt-hour is a unit of energy (power × time); the others are units of power.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The admittance of a pure capacitor of 50 μF at 50 Hz is about:
सही उत्तर: घ) j0.0157 S
Y = jωC = j × 314.16 × 50 × 10⁻⁶ ≈ j0.0157 S (positive susceptance).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A single-phase load of 4 kW at 0.8 pf lagging is supplied at 200 V. The current drawn is:
सही उत्तर: घ) 25 A
I = P/(V cos φ) = 4000/(200 × 0.8) = 25 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A balanced star-connected load has an impedance of (8 + j6) Ω per phase on a 400 V, three-phase supply. The total reactive power is about:
सही उत्तर: ख) 9.6 kVAR
I_ph = 231/10 = 23.1 A, so Q = 3I²X = 3 × 23.1² × 6 ≈ 9.6 kVAR.
💬 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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