इन्जिनियरिङ प्रवेश – Mathematics, Physics, Chemistry, English
इन्जिनियरिङ प्रवेश – Mathematics, Physics, Chemistry, English
Engineering Entrance – Mathematics, Physics, Chemistry & English · ३,८४१ प्रश्न
३,८४१ प्रश्न उपलब्ध। मोड छान्नुहोस्:
इन्जिनियरिङ 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 ratio E/B of the magnitudes of an electric field and a magnetic field has the dimensions of:
सही उत्तर: ख) velocity
From F = qE and F = qvB, E/B has the same dimensions as v, i.e. [LT⁻¹].
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The product 2.5 × 3.42, expressed with the correct number of significant figures, is:
सही उत्तर: ख) 8.6
The result must have as many significant figures as the least precise factor (2.5 has two): 8.55 rounds to 8.6.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the determination of g = 4π²L/T² with a simple pendulum, the errors in L and T are 1% and 2% respectively. The maximum percentage error in g is:
सही उत्तर: ग) 5%
Δg/g = ΔL/L + 2ΔT/T = 1% + 2 × 2% = 5%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The dimensional formula of self-inductance is:
सही उत्तर: घ) [ML²T⁻²A⁻²]
From U = ½LI², L = 2U/I² has dimensions [ML²T⁻²]/[A²] = [ML²T⁻²A⁻²].
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The dimensional formula of electric potential (voltage) is:
सही उत्तर: क) [ML²T⁻³A⁻¹]
V = W/q = [ML²T⁻²]/[AT] = [ML²T⁻³A⁻¹].
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The sum of the first 10 terms of the series 1·3 + 2·5 + 3·7 + ... is:
सही उत्तर: ख) 825
The k-th term is k(2k + 1) = 2k² + k, so the sum is 2(385) + 55 = 825.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Three persons are chosen at random. The probability that they were born on three different days of the week is:
सही उत्तर: ग) 30/49
Favourable: 7 × 6 × 5 = 210 of 7³ = 343 equally likely cases, so 210/343 = 30/49.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The mean of a binomial distribution with n = 20 and p = 0.3 is:
सही उत्तर: घ) 6
Mean = np = 20 × 0.3 = 6.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Machine A makes 60% and machine B 40% of a factory's items; 2% of A's and 3% of B's items are defective. A randomly chosen item is defective. The probability that it was made by B is:
सही उत्तर: क) 1/2
By Bayes' theorem: (0.4 × 0.03)/(0.6 × 0.02 + 0.4 × 0.03) = 0.012/0.024 = 1/2.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Three fair coins are tossed. The probability of getting at most one tail is:
सही उत्तर: क) 1/2
Outcomes with 0 tails (1) or 1 tail (3) give 4 of 8, i.e. 1/2.
💬 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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