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 magnitude of the charge on one electron is approximately:
सही उत्तर: ग) 1.6 x 10^-19 C
The elementary charge is about 1.602 x 10^-19 coulomb; 9.1 x 10^-31 kg is the electron's mass.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which protective device trips when it detects an imbalance between live and neutral currents caused by leakage to earth?
सही उत्तर: घ) Residual current circuit breaker (RCCB)
An RCCB (also called ELCB/RCD) compares live and neutral currents and trips on a small earth-leakage difference, e.g. 30 mA.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A fuse protects an electrical circuit by:
सही उत्तर: क) melting and breaking the circuit when the current exceeds its rating
The fuse wire has a low melting point; excessive current heats it until it melts and opens the circuit.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main purpose of earthing the metal body of an electrical appliance is to:
सही उत्तर: ख) protect users from electric shock by giving fault current a low-resistance path to earth
If live wire touches the body, the fault current flows to earth (blowing the fuse or tripping the breaker) instead of through a person.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The electrical energy consumed in a house is recorded by a/an:
सही उत्तर: ग) energy meter (kWh meter)
An energy meter integrates power over time and displays the consumption in kWh (units).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which instrument is used to measure the insulation resistance of cables and machines?
सही उत्तर: ख) Megger
A megger (insulation tester) applies a high DC voltage and reads resistance in megohms.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An ideal voltmeter should have:
सही उत्तर: ख) very high resistance and be connected in parallel
A voltmeter connected across the element must draw negligible current, so its resistance should be very high.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An ammeter is connected in a circuit:
सही उत्तर: ख) in series, and it should have very low resistance
An ammeter must carry the circuit current without affecting it, so it goes in series and has very low resistance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which type of DC motor has a very high starting torque and is used for electric traction?
सही उत्तर: घ) DC series motor
In a series motor the field current equals the armature current, so torque rises steeply with current at starting.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a DC generator, the part that converts the alternating emf induced in the armature into direct voltage at the terminals is the:
सही उत्तर: घ) commutator
The commutator, a segmented rotating switch, reverses connections every half turn to give unidirectional output.
💬 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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