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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Millman's theorem is used to:
सही उत्तर: ग) replace several parallel voltage sources with series resistances by one equivalent source
Millman's theorem combines parallel branches, each a voltage source with a series resistance, into a single equivalent source and resistance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reciprocity theorem can be applied to networks that are:
सही उत्तर: क) linear and bilateral
Reciprocity holds for linear, bilateral networks: the response-to-excitation ratio stays the same when their positions are interchanged.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Nodal analysis of an electric circuit is based on:
सही उत्तर: घ) Kirchhoff's current law
Node equations are written by applying KCL at each node with unknown node voltages; mesh analysis uses KVL.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Four 1 ohm resistors form the sides of a square. The resistance measured between two diagonally opposite corners is:
सही उत्तर: घ) 1 ohm
There are two paths of 2 ohm each (two sides in series) in parallel, giving 1 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When no current is drawn from a cell (open circuit), its terminal voltage is equal to:
सही उत्तर: घ) its emf
With no current there is no internal voltage drop, so terminal voltage = emf.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A cell of emf 1.5 V and internal resistance 0.5 ohm is short-circuited. The current that flows is:
सही उत्तर: ग) 3 A
With zero external resistance, I = E / r = 1.5 / 0.5 = 3 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 12 V supply feeds a 4 ohm resistor in series with two 8 ohm resistors that are in parallel with each other. The current drawn from the supply is:
सही उत्तर: ग) 1.5 A
The parallel pair gives 4 ohm; total = 4 + 4 = 8 ohm, so I = 12 / 8 = 1.5 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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At a node, currents of 5 A and 3 A flow in, and 2 A flows out through one branch. The current in the only other branch is:
सही उत्तर: ख) 6 A flowing out of the node
By KCL, total in = total out: 5 + 3 = 2 + I, so I = 6 A leaving the node.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the resistance of a heater element is halved while the supply voltage remains the same, its power:
सही उत्तर: ख) doubles
P = V^2 / R, so halving R doubles the power.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two identical bulbs, each rated 100 W, 220 V, are connected in series across a 220 V supply. Assuming constant resistance, the total power drawn is:
सही उत्तर: ग) 50 W
Each bulb has R = 220^2/100 = 484 ohm; in series R = 968 ohm, so P = 220^2/968 = 50 W.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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