आईओई इन्जिनियरिङ प्रवेश (त्रिवि) M.Sc. इन्जिनियरिङ प्रवेश तयारी
आईओई इन्जिनियरिङ प्रवेश (त्रिवि) – M.Sc. इन्जिनियरिङ प्रवेश
IOE M.Sc. Engineering Entrance · IOE Entrance (TU)
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
BE/B.Arch प्रवेश: 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 magnetic field inside a toroid of N turns and mean radius r carrying current I is:
सही उत्तर: घ) μ₀NI/(2πr)
Applying Ampere's law to a circle of radius r inside the toroid: B·2πr = μ₀NI.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ampere's circuital law states that the line integral ∮B·dl around a closed loop equals:
सही उत्तर: क) μ₀ times the net current enclosed
∮B·dl = μ₀I_enclosed (in the absence of time-varying electric fields).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The magnetic field due to a straight current-carrying wire at a point lying on the wire's own line (extended) is:
सही उत्तर: ख) zero
By the Biot–Savart law dB ∝ dl × r̂, which is zero when r is along dl.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Faraday constant, the charge carried by one mole of electrons, is about:
सही उत्तर: ख) 96500 C/mol
F = N_A e = 6.02 × 10²³ × 1.6 × 10⁻¹⁹ ≈ 96500 C/mol.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The absorption or evolution of heat at a junction of two dissimilar metals when a current passes through it is called the:
सही उत्तर: ग) Peltier effect
The Peltier effect is the reverse of the Seebeck effect: current through a junction heats or cools it depending on direction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A superconductor below its critical temperature has:
सही उत्तर: घ) zero electrical resistance
Below the critical temperature a superconductor's resistance drops to zero.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistivity of a metallic wire depends on:
सही उत्तर: क) its material and temperature
Resistivity is a property of the material at a given temperature; length and area affect resistance, not resistivity.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following does NOT obey Ohm's law?
सही उत्तर: क) a semiconductor diode
A diode's current varies non-linearly with voltage and depends on polarity, so it is a non-ohmic device.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A parallel-plate capacitor remains connected to a battery while its plate separation is doubled. The energy stored in it:
सही उत्तर: ख) becomes half
C becomes C/2 while V stays fixed, so U = CV²/2 is halved.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two electric field lines never intersect because:
सही उत्तर: ग) the field at a point has only one direction
If two lines crossed, the field would have two directions at the crossing point, which is impossible.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
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