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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Capacitors of 4 µF and 12 µF are connected in series. The equivalent capacitance is:
सही उत्तर: ख) 3 µF
In series, C = C1 C2 / (C1 + C2) = 48 / 16 = 3 µF.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The capacitance of a parallel-plate capacitor increases when:
सही उत्तर: ग) the plate area is increased
C = epsilon A / d, so C rises with plate area and permittivity and falls with separation; it does not depend on voltage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of capacitance is the:
सही उत्तर: घ) farad
Capacitance C = Q/V is measured in farads (F).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Under the condition of maximum power transfer, the efficiency of power transfer from the source is:
सही उत्तर: ख) 50%
With R_L = R_th, equal power is lost in the source resistance and delivered to the load, so efficiency is 50%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Three equal resistors of 9 ohm each are connected in delta. The resistance of each arm of the equivalent star is:
सही उत्तर: क) 3 ohm
For a balanced network R_star = R_delta / 3 = 9 / 3 = 3 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The superposition theorem can be applied only to circuits that are:
सही उत्तर: ग) linear
Superposition requires linearity, so it holds for voltages and currents in linear circuits (not directly for power).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A network has a Thevenin voltage of 10 V and Thevenin resistance of 5 ohm. The maximum power it can deliver to a load is:
सही उत्तर: ग) 5 W
P_max = V_th^2 / (4 R_th) = 100 / 20 = 5 W.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to the maximum power transfer theorem, a DC source delivers maximum power to a load when the load resistance is:
सही उत्तर: क) equal to the internal (Thevenin) resistance of the source
Maximum power is transferred when R_L = R_th.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Norton's equivalent of a linear two-terminal network consists of:
सही उत्तर: घ) a current source in parallel with a resistance
Norton uses the short-circuit current I_N in parallel with R_N (equal to R_th).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Thevenin's equivalent of a linear two-terminal network consists of:
सही उत्तर: क) a voltage source in series with a resistance
Thevenin replaces the network by V_th in series with R_th as seen from the load terminals.
💬 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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