CTEVT स्वास्थ्य प्रवेश PCL नर्सिङ र HA प्रवेश तयारी
CTEVT स्वास्थ्य प्रवेश – PCL नर्सिङ र HA प्रवेश
CTEVT PCL Nursing & HA · CTEVT Health Entrance
१,६३७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
CTEVT स्वास्थ्य 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 transformer works only with:
सही उत्तर: ख) Alternating current
A transformer works on mutual induction, which needs a changing magnetic field produced by AC. Steady DC produces no changing flux.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An electric generator (dynamo) converts:
सही उत्तर: घ) Mechanical energy into electrical energy
A generator works on electromagnetic induction and converts mechanical energy into electrical energy. An electric motor does the reverse.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A current of 2 A flows through a wire for 5 minutes. The charge that flows is:
सही उत्तर: ग) 600 C
Q = I × t = 2 × (5 × 60 s) = 600 C. Using minutes instead of seconds gives the wrong answer of 10 C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An electric heater draws 5 A of current from a 220 V supply. Its power is:
सही उत्तर: ग) 1100 W
Electric power P = VI = 220 × 5 = 1100 W. Dividing 220 by 5 (44) gives resistance in ohms, not power.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Two resistors of 6 Ω and 3 Ω are connected in parallel. Their equivalent resistance is:
सही उत्तर: घ) 2 Ω
In parallel, R = (R₁R₂)/(R₁ + R₂) = 18/9 = 2 Ω. 9 Ω would be the series combination.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Light travels in glass at 2 × 10⁸ m/s. If its speed in vacuum is 3 × 10⁸ m/s, the refractive index of glass is:
सही उत्तर: घ) 1.5
Refractive index n = speed in vacuum / speed in medium = 3 × 10⁸ / 2 × 10⁸ = 1.5. 1.33 is the refractive index of water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The radius of curvature of a spherical mirror is 20 cm. Its focal length is:
सही उत्तर: ख) 10 cm
For a spherical mirror, f = R/2 = 20/2 = 10 cm. The focus lies midway between the pole and the centre of curvature.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Hypermetropia (long-sightedness) is corrected by using a:
सही उत्तर: क) Convex lens
In hypermetropia the image forms behind the retina, so a converging (convex) lens is needed. A concave lens is used for myopia.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The speed of sound is greatest in:
सही उत्तर: ख) Steel
Sound travels fastest in solids, slower in liquids and slowest in gases. It does not travel at all in vacuum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A machine does 600 J of work in 30 seconds. Its power is:
सही उत्तर: ग) 20 W
Power = work / time = 600 / 30 = 20 W. Multiplying work by time (18000) is incorrect.
💬 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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