आधारभूत विद्युत् (Basic Electrical) – Basic Electrical Engineering MCQ
आधारभूत विद्युत् (Basic Electrical) – इलेक्ट्रिकल र टेलिकम
Basic Electrical Engineering · Technical – Electrical, Mechanical & Telecom · २,२९९ प्रश्न
२,२९९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
आधारभूत विद्युत् (Basic Electrical): प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
One British horsepower (hp) is approximately equal to:
सही उत्तर: ग) 746 W
1 hp is approximately 746 W (British); metric hp is about 735.5 W.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A motor takes 2 kW of electrical input and delivers 1.6 kW of mechanical output. Its efficiency is:
सही उत्तर: घ) 80%
Efficiency = output / input = 1.6 / 2 = 0.8 = 80%.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Five 40 W tube lights are used for 6 hours daily for 30 days. The energy consumed is:
सही उत्तर: ख) 36 units (kWh)
Energy = 5 x 40 W x 6 h x 30 = 36,000 Wh = 36 kWh.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A resistive heater is rated 1000 W at 230 V. If the supply voltage falls to 115 V, the power becomes about:
सही उत्तर: क) 250 W
P = V^2/R; halving the voltage reduces power to one quarter: 1000/4 = 250 W.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Three resistors of 30 ohm each are connected in star. The resistance of each arm of the equivalent delta is:
सही उत्तर: ग) 90 ohm
For equal resistors, R_delta = 3 R_star = 3 x 30 = 90 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following is a passive circuit element?
सही उत्तर: ग) Resistor
Passive elements cannot supply net energy; resistors, inductors and capacitors are passive.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
When finding the Thevenin resistance of a network with only independent sources, the sources are replaced by:
सही उत्तर: क) short circuits for voltage sources and open circuits for current sources
Sources are 'killed' by replacing them with their internal resistances: zero for voltage sources and infinite for current sources.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A circuit has a Thevenin voltage of 12 V and a Thevenin resistance of 4 ohm. Its Norton current is:
सही उत्तर: घ) 3 A
I_N = V_Th / R_Th = 12 / 4 = 3 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A 10 V voltage source with a 2 ohm series resistance is converted into an equivalent current source. The current source value is:
सही उत्तर: क) 5 A with 2 ohm in parallel
Source transformation: I = V/R = 10/2 = 5 A, with the same 2 ohm resistance placed in parallel.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
An ideal voltage source has an internal resistance of:
सही उत्तर: क) zero
An ideal voltage source keeps its terminal voltage constant for any current, so its internal resistance is zero.
💬 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।