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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One farad is equal to:
सही उत्तर: घ) one coulomb per volt
Capacitance C = Q / V, so 1 F = 1 C / 1 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The voltage rating marked on a capacitor indicates:
सही उत्तर: ख) the maximum voltage it can safely withstand without dielectric breakdown
Exceeding the working voltage can break down the dielectric and destroy the capacitor.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Capacitors of 2 microfarad and 3 microfarad are connected in series across a 100 V DC supply. The voltage across the 2 microfarad capacitor is:
सही उत्तर: क) 60 V
In series V divides inversely as C: V_2 = 100 x 3 / (2 + 3) = 60 V, and the 3 microfarad capacitor gets 40 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When capacitors are connected in series across a DC supply, which quantity is the same for every capacitor?
सही उत्तर: ग) The charge
The same charge flows onto each series capacitor; the voltage divides in inverse proportion to capacitance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Gauss's law states that the total electric flux through any closed surface equals:
सही उत्तर: घ) the net charge enclosed divided by epsilon_0
Total flux = Q_enclosed / epsilon_0, independent of the shape of the closed surface.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The electric potential at a distance of 0.1 m from a point charge of 1 microcoulomb in air is (take k = 9 x 10^9 N m^2/C^2):
सही उत्तर: ग) 9 x 10^4 V
V = kQ / r = 9 x 10^9 x 10^-6 / 0.1 = 9 x 10^4 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The work done in moving a charge along an equipotential surface is:
सही उत्तर: क) zero
All points of an equipotential surface are at the same potential, so W = q x (potential difference) = 0.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The electric field inside a hollow charged metal conductor (in electrostatic equilibrium) is:
सही उत्तर: ग) zero
Charge resides on the outer surface, so the field inside is zero; this is the basis of electrostatic shielding (Faraday cage).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Electric lines of force (field lines):
सही उत्तर: ख) start on positive charges and end on negative charges
Electrostatic field lines originate on positive charges and terminate on negative charges, and they never intersect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A motor delivers an output of 5 hp while drawing 4.5 kW of electrical input. Taking 1 hp = 746 W, its efficiency is about:
सही उत्तर: ख) 83%
Output = 5 x 746 = 3730 W, so efficiency = 3730 / 4500, about 0.83 or 83%.
💬 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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