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)
२,६०७ 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
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A simple harmonic oscillator has a period of 2 seconds. If its amplitude is 0.1 meters, what is the maximum velocity of the oscillating object?
सही उत्तर: ख) 1 m/s
The maximum velocity of an SHM can be found using the equation v = Aω, where A is the amplitude and ω is the angular frequency (ω = 2πf, where f is the frequency). Since the period T = 2 s, the frequency f = 1/T = 1/2 Hz. Therefore, ω = 2π(1/2) = π rad/s. Thus v = (0.1 m)(π rad/s) ≈ 0.314 m/s. Option 1 is the closest to this value. The other options are incorrect because they either use wrong values for amplitude or angular frequency.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A parallel circuit consists of two resistors, R1 = 5 Ω and R2 = 10 Ω, connected across a 12 V battery. The current flowing through R1 is:
सही उत्तर: ग) 3 A
In a parallel circuit, the voltage across each resistor is equal to the supply voltage. The total resistance is R = 5 Ω + 10 Ω = 15 Ω. Using Ohm’s law (I = V/R), the current through R1 (which is 5Ω) is I = 12V / 15Ω = 0.8 A, but since this is part of a parallel circuit, the same current flows through both resistors. The options provided are incorrect as they don't calculate the correct equivalent resistance or use it to find the current.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The force required to accelerate a 5 kg block along a horizontal surface with a coefficient of kinetic friction of 0.2 is (Take g = 9.8 m/s²)
सही उत्तर: ख) 20 N
The frictional force is calculated as μk * m * g, where μk is the coefficient of kinetic friction, m is the mass, and g is the acceleration due to gravity. Option 1 (10N) is correct because 0.2 * 5 kg * 9.8 m/s² = 9.8 N which is close enough to 10N due to rounding. Options 2 (20N), 49N, and 98N are incorrect as they don’t apply the correct formula or use incorrect values.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A software bug is best described as: (a) A deliberate error introduced by the programmer. (b) An unintentional flaw in the code that causes unexpected behavior. (c) The process of testing a program for errors. (d) A security vulnerability exploited by malicious actors.
सही उत्तर: ख) (b) An unintentional flaw in the code that causes unexpected behavior
A bug is an unintended error or flaw within computer code. While programmers can introduce deliberate errors (option A), the term ‘bug’ typically refers to unintentional flaws that cause unexpected behavior. Options C & D relate to related activities and security concepts.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The concept of 'virtual memory' in operating systems aims to: (a) Physically store all data on external storage devices. (b) Simulate more RAM than is physically present in the system. (c) Directly access hardware components for faster processing. (d) Automatically backup all files to prevent data loss.
सही उत्तर: ख) (b) Simulate more RAM than is physically present in the system
Virtual memory allows programs to use more memory than physically available by swapping portions of data between RAM and secondary storage. This simulates a larger address space. Option A is incorrect as virtual memory doesn't store data on external storage directly. Options C & D are related to performance optimization and backup, respectively.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In computer memory, RAM stands for what? (a) Read Access Memory (b) Random Access Memory (c) Rapid Application Method (d) Remote Automated Machine
सही उत्तर: ख) (b) Random Access Memory
RAM stands for Random Access Memory. This type of memory allows data to be accessed directly in any order. The other options are incorrect as they describe different technologies or concepts.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A ball rolls across a horizontal surface with an angular velocity of 3 rad/s and a linear velocity of 6 m/s. The moment of inertia of the ball is 0.2 kg·m². What is the kinetic energy of the rolling ball? (Year: 2023)
सही उत्तर: ख) 7.2 J
The kinetic energy of a rolling object is given by KE = (1/2)Iω², where I is the moment of inertia and ω is the angular velocity. Substituting the values, we get KE = (1/2)(0.2 kg·m²)(3 rad/s)² = 7.2 J. The other options are incorrect as they do not use these correct figures.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The probability of selecting a red ball from Box I, given that Box I has 2 red and 3 white balls, is:
सही उत्तर: क) 2/5
Box I contains 2 red balls out of a total of 2+3=5 balls. Therefore, the probability of selecting a red ball from Box I is 2/5.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The value of (√(3) + √5)² is:
सही उत्तर: क) 8 + 2√15
Expanding the expression, we get (√(3) + √5)² = (√(3))² + 2(√(3))(√5) + (√5)² = 3 + 2√15 + 5 = 8 + 2√15. This is the correct answer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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If sin θ = 3/5 and θ is in the first quadrant, then cos θ is:
सही उत्तर: क) 4/5
Using the Pythagorean identity, sin²θ + cos²θ = 1. So, cos²θ = 1 - sin²θ = 1 - (3/5)² = 1 - 9/25 = 16/25. Therefore, cos θ = ±4/5. Since θ is in the first quadrant, cosine is positive, so cos θ = 4/5.
💬 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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