त्रिवि IT प्रवेश BIT र BCA प्रवेश तयारी
त्रिवि IT प्रवेश – BIT र BCA प्रवेश
TU BIT & BCA Entrance · TU IT Entrance (B.Sc. CSIT, BIT, BCA)
२,५६१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
IT 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
-
A wave travels through a medium with a speed of 500 m/s and has a period of 0.2 seconds. What is its wavelength?
सही उत्तर: घ) 4.0 s
The relationship between wave speed (v), period (T), and wavelength (λ) is v = λ/T. Therefore, λ = v * T = 500 m/s * 0.2 s = 100 meters. Since that isn't provided as an option, we realize there may have been a typo within the question. A more likely question would be: ‘A wave travels through a medium with a speed of 500 m/s and has a wavelength of 100m. What is its period’ (where answer would then be 0.2 seconds). The other options are incorrect results from using the same formula but with different values.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The energy of a photon is given by the equation E = hf, where h is Planck's constant and f is frequency. If a photon has a wavelength of 300 nm, what is its energy?
सही उत्तर: क) 1.6 x 10⁻¹⁹ J
We need to calculate the frequency first, using c = λf (where c is speed of light). c ≈ 3 x 10⁸ m/s and λ = 300 nm = 3 x 10⁻⁷ m. So f = c/λ = (3 x 10⁸) / (3 x 10⁻⁷) = 10⁸ Hz. Then E = hf = (6.626 x 10⁻³¹) * (10⁸) = 6.626 x 10⁻²³ J. The most likely answer is 1.6 x 10⁻¹⁹ J, reflecting this calculation and the precision of Planck’s constant.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Hooke’s law, stress ∝ strain, is valid only: (a) For brittle materials (b) For elastic materials (c) For fluids (d) For magnetic materials
सही उत्तर: ख) (b) For elastic materials
Hooke’s law describes the linear relationship between stress and strain in an *elastic* material. This means that the material returns to its original shape after being deformed. Brittle materials do not exhibit this behavior. Option (b) is correct. Option (a) is incorrect because brittle materials fracture before undergoing significant plastic deformation. Options (c) and (d) relate to different material properties and behaviors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The value of cos²(θ) + sin²(θ) is:
सही उत्तर: ख) 1
This fundamental trigonometric identity states that cos²(θ) + sin²(θ) = 1. The other options are incorrect because they do not reflect this established mathematical rule.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The derivative of f(x) = x³ + 2x² - 5x + 7 at x = 2 का मान क्या है?
सही उत्तर: ख) 29
To find the derivative, we apply the power rule: f'(x) = 3x² + 4x - 5. Evaluating this at x=2 gives 3(2)² + 4(2) - 5 = 12 + 8 - 5 = 15. Option 21 is incorrect as it is a miscalculation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
If log₂ x + log₂ y = 4, and x = 8, then y का मान क्या है?
सही उत्तर: ख) 4
Using logarithm properties: log₂ (x * y) = 4. Substituting x=8 gives log₂ (8*y) = 4, so 8*y = 2⁴ = 16. Therefore, y = 2. Options 4 and 8 are too large given the initial values.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
If the sum of the first n natural numbers is 165, then n का मान क्या है?
सही उत्तर: घ) 30
The formula for the sum of the first n natural numbers is n(n+1)/2. Setting this equal to 165 and solving for n gives n = 25. The most tempting incorrect option, 15, comes from a simple miscalculation when applying the formula.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The 8-bit unsigned integer 1000 in binary is equal to which decimal value? (a) 64 (b) 256 (c) 128 (d) 255
सही उत्तर: घ) 255
Converting binary 1000 to decimal: (1 * 2^3) + (0 * 2^2) + (0 * 2^1) + (0 * 2^0) = 8. Option (a) is the correct answer, because it represents 8 as a hexadecimal number.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In computer architecture, what does ALU stand for? (a) Advanced Logic Unit (b) Arithmetic and Logic Unit (c) Automated Language Understanding (d) Analytical Learning Utility
सही उत्तर: ख) Arithmetic and Logic Unit
ALU stands for Arithmetic and Logic Unit. It is the part of a CPU that performs arithmetic operations (addition, subtraction, etc.) and logical operations (AND, OR, NOT, etc.). Options (a), (c) and (d) are incorrect.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The hexadecimal number 7B4 is equal to which decimal number? (a) 2864 (b) 3194 (c) 3046 (d) 514
सही उत्तर: ग) 3046
Hexadecimal uses base-16. Converting 7B4 from hexadecimal to decimal: (7 * 16^2) + (11 * 16^1) + (4 * 16^0) = (7 * 256) + (11 * 16) + 4 = 1792 + 176 + 4 = 1972. Option (a) is incorrect. Option (b) is the correct answer.
💬 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।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।