प्राविधिक – इलेक्ट्रिकल, मेकानिकल र टेलिकम
प्राविधिक – इलेक्ट्रिकल, मेकानिकल र टेलिकम
Technical – Electrical, Mechanical & Telecom · ४,५०० प्रश्न
४,५०० प्रश्न उपलब्ध। मोड छान्नुहोस्:
इलेक्ट्रिकल र टेलिकम: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Under the principle of duality, the dual of a series RL circuit fed by a voltage source is a:
सही उत्तर: ग) Parallel GC circuit fed by a current source
Duality swaps series with parallel, voltage with current, R with G and L with C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In the graph of a connected network with n nodes, a tree contains how many branches (twigs)?
सही उत्तर: क) n - 1
A tree joins all n nodes without forming a loop, which needs exactly n - 1 branches; the remaining branches are links.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Two identical batteries, each 12 V with 1 ohm internal resistance, are connected in parallel across a 5.5 ohm load. The load current is:
सही उत्तर: ख) 2 A
The parallel pair is equivalent to 12 V with 0.5 ohm, so I = 12 / (0.5 + 5.5) = 2 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
An infinite ladder network has 1 ohm in each series arm and 1 ohm in each shunt arm. Its input resistance is about:
सही उत्तर: घ) 1.618 ohm
R = 1 + (1 x R)/(1 + R) gives R^2 - R - 1 = 0, so R = (1 + sqrt 5)/2 = 1.618 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Twelve 1-ohm resistors form the edges of a cube. The resistance between two diagonally opposite corners of the cube is:
सही उत्तर: क) 5/6 ohm
By symmetry the current splits 3 ways, then 6 ways, then 3 ways: R = 1/3 + 1/6 + 1/3 = 5/6 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A metal oxide varistor (MOV) connected across supply terminals is used to:
सही उत्तर: ग) Protect equipment against voltage surges by conducting heavily above a threshold voltage
A varistor's resistance falls sharply at high voltage, clamping spikes and diverting surge current.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The resistance of a light-dependent resistor (LDR):
सही उत्तर: ग) Decreases as the light falling on it increases
Light frees more charge carriers in the photoconductive material, so its resistance falls in bright light.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A potentiometer used as the volume control of an amplifier works as a:
सही उत्तर: क) Variable voltage divider
The wiper taps off an adjustable fraction of the voltage across the whole resistive track.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A surface-mount (SMD) resistor is marked '472'. Its resistance is:
सही उत्तर: ख) 4.7 kilo-ohm
The first two digits are significant figures and the third is the multiplier: 47 x 10^2 = 4700 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
For high-power applications that also need good precision, which type of fixed resistor is generally used?
सही उत्तर: घ) Wire-wound resistor
Wire-wound resistors use resistance wire (e.g. nichrome or manganin) on a ceramic former, handling high power with good stability.
💬 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।