चिकित्सा शिक्षा आयोग (CEE) आयुर्वेद र होमियोप्याथी (BAMS) तयारी
चिकित्सा शिक्षा आयोग (CEE) – आयुर्वेद र होमियोप्याथी (BAMS)
BAMS 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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The electric potential at a distance of 9 cm from a point charge of 1 μC in air is (1/4πε₀ = 9 × 10⁹ N m² C⁻²):
सही उत्तर: ग) 1 × 10⁵ V
V = kq/r = 9 × 10⁹ × 10⁻⁶/0.09 = 1 × 10⁵ V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Light of wavelength 500 nm falls normally on a single slit of width 0.1 mm. The width of the central maximum on a screen 1 m away is:
सही उत्तर: क) 10 mm
Width of central maximum = 2λD/a = 2 × 500 × 10⁻⁹ × 1/10⁻⁴ = 10⁻² m = 10 mm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Young's double-slit experiment, the path difference between the two waves at the third dark fringe from the centre is:
सही उत्तर: क) 5λ/2
Dark fringes occur at path difference (2n − 1)λ/2; for n = 3 it is 5λ/2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Young's double-slit experiment, the separation between the slits is doubled and the distance of the screen from the slits is halved. The fringe width becomes:
सही उत्तर: ख) one-fourth
β = λD/d; D halved and d doubled make β = (1/2)/2 = 1/4 of its original value.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An object is placed 30 cm in front of a convex lens of focal length 10 cm. The magnification of the image is:
सही उत्तर: ग) −0.5
1/v − 1/u = 1/f with u = −30 cm gives v = +15 cm; m = v/u = 15/(−30) = −0.5 (real, inverted, diminished).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A coin lies at the bottom of a beaker filled with water (μ = 4/3) to a depth of 20 cm. Viewed from above, the coin appears to be raised by:
सही उत्तर: घ) 5 cm
Apparent depth = 20/(4/3) = 15 cm, so the coin appears raised by 20 − 15 = 5 cm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The refractive indices of a glass for violet, red and mean (yellow) light are 1.66, 1.64 and 1.65 respectively. The dispersive power of the glass is about:
सही उत्तर: क) 0.031
ω = (μᵥ − μᵣ)/(μ − 1) = (1.66 − 1.64)/(1.65 − 1) = 0.02/0.65 ≈ 0.031.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a compound microscope, the intermediate image formed by the objective lens is:
सही उत्तर: ग) real, inverted and magnified
The object is placed just beyond the focus of the short-focus objective, so it forms a real, inverted and magnified image, which the eyepiece then magnifies further.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A thin prism of angle 5° is made of glass of refractive index 1.6. The deviation produced by it is:
सही उत्तर: ख) 3°
For a thin prism δ = (μ − 1)A = 0.6 × 5° = 3°.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A convex lens of focal length 20 cm is placed in contact with a concave lens of focal length 40 cm. The combination behaves as a:
सही उत्तर: घ) convex lens of focal length 40 cm
1/F = 1/20 − 1/40 = 1/40, so F = +40 cm (converging).
💬 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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