चिकित्सा शिक्षा आयोग (CEE) एमबीबीएस प्रवेश परीक्षा तयारी
चिकित्सा शिक्षा आयोग (CEE) – एमबीबीएस प्रवेश परीक्षा
CEE – MBBS Entrance · Medical Education Commission – CEE
२,०३९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MBBS/BDS/Nursing 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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A cell of emf 12 V and internal resistance 1 Ω is connected to an external resistance of 5 Ω. The current in the circuit is:
सही उत्तर: घ) 2 A
I = E/(R + r) = 12/(5 + 1) = 2 A. 2.4 A ignores the internal resistance.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a balanced Wheatstone bridge, P = 10 Ω, Q = 20 Ω and R = 15 Ω. The value of S is:
सही उत्तर: ग) 30 Ω
At balance P/Q = R/S, so S = RQ/P = 15 × 20/10 = 30 Ω. 7.5 Ω results from inverting the ratio.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resistance of the filament of a bulb rated 100 W, 220 V is:
सही उत्तर: ख) 484 Ω
R = V²/P = 220²/100 = 48400/100 = 484 Ω. 2.2 Ω results from dividing V by P.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kirchhoff's junction (current) law is based on the conservation of:
सही उत्तर: क) Charge
The sum of currents entering a junction equals the sum leaving because charge cannot accumulate there. The loop (voltage) law is based on conservation of energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A wire of resistance R is stretched uniformly to twice its original length. Its new resistance is:
सही उत्तर: घ) 4R
Volume is constant, so doubling the length halves the area; R = ρL/A becomes ρ(2L)/(A/2) = 4R. 2R ignores the decrease in area.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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According to Gauss's law, the total electric flux through a closed surface enclosing a charge q (in vacuum) is:
सही उत्तर: ग) q/ε₀
Gauss's law states φ = q_enclosed/ε₀, independent of the shape of the surface. The flux is zero only when the net enclosed charge is zero.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A capacitor of 10 µF is charged to 100 V. The energy stored in it is:
सही उत्तर: ख) 0.05 J
U = ½CV² = ½ × 10 × 10⁻⁶ × 10⁴ = 0.05 J. 0.1 J results from omitting the factor ½.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two capacitors of 2 µF and 3 µF are connected in series. The equivalent capacitance is:
सही उत्तर: क) 1.2 µF
For series, 1/C = 1/2 + 1/3 = 5/6, so C = 1.2 µF. 5 µF is the parallel combination.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The electric field inside a charged hollow conductor (in electrostatic equilibrium) is:
सही उत्तर: घ) Zero
Charges reside on the outer surface and the field inside a conductor is zero; this is the basis of electrostatic shielding. The potential inside, however, is constant and equal to the surface potential.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If the distance between two point charges is doubled, the electrostatic force between them becomes:
सही उत्तर: ग) One-fourth
Coulomb's law gives F ∝ 1/r², so doubling r reduces F to 1/4. Half would follow from an incorrect 1/r dependence.
💬 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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