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 resistance of a lamp rated 100 W, 230 V when it is glowing normally is about:
सही उत्तर: ख) 529 ohm
R = V^2 / P = 230^2 / 100 = 52900 / 100 = 529 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a parallel circuit, which quantity is the same for every branch?
सही उत्तर: ख) Voltage
All parallel branches are connected across the same two points, so they have the same voltage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a series circuit, which quantity is the same through every element?
सही उत्तर: घ) Current
In series there is only one path, so the same current flows through every element.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two 10 ohm resistors are connected in parallel and the combination is connected in series with a 5 ohm resistor. The total resistance is:
सही उत्तर: घ) 10 ohm
10 ohm parallel 10 ohm = 5 ohm; 5 + 5 = 10 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistance of an NTC thermistor:
सही उत्तर: घ) decreases as its temperature increases
NTC stands for negative temperature coefficient: resistance falls as temperature rises.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The SI unit of current density is:
सही उत्तर: क) ampere per square metre (A/m^2)
Current density is current per unit cross-sectional area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A material whose resistance falls to exactly zero below a certain critical temperature is called a:
सही उत्तर: घ) superconductor
Superconductors carry current without any resistance below their critical temperature.
💬 टिप्पणी / गल्ती रिपोर्ट (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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