आधारभूत विद्युत् (Basic Electrical) – Basic Electrical Engineering MCQ

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

431. A resistor and an inductor in series are connected to an AC supply. Which statement about Kirchhoff's voltage law is correct?

     कKVL does not apply to AC circuits खKVL holds only at resonance गThe RMS voltages across R and L always add arithmetically to the supply voltage घKVL holds for instantaneous values and for phasors, but the RMS voltages across R and L do not add arithmetically to the supply voltage
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

432. The substitution theorem states that a branch of a network carrying current I with voltage V across it:

     कcan be replaced by an ideal source of that voltage V (or current I) without changing other branch currents and voltages खcan be replaced by a short circuit गmust be replaced by its Thevenin equivalent घcan always be removed without any effect
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

433. Using the passive sign convention, an element has 10 V across it and a current of 2 A entering its negative terminal. The element:

     कabsorbs 5 W खneither absorbs nor delivers power गdelivers 20 W (absorbed power is −20 W) घabsorbs 20 W
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

434. A 12 V car battery with an internal resistance of 0.02 Ω supplies 200 A to the starter motor. The terminal voltage during cranking is:

     क8 V ख12 V ग4 V घ11.98 V
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

435. A battery drives 1 A through a 5 Ω resistor and 0.5 A through an 11 Ω resistor. Its emf and internal resistance are:

     क5.5 V and 0.5 Ω ख6 V and 0.5 Ω ग6 V and 1 Ω घ5 V and 1 Ω
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

436. A 12 V supply feeds two parallel branches: branch 1 is 2 Ω (top) in series with 4 Ω (bottom), and branch 2 is 4 Ω (top) in series with 2 Ω (bottom). The open-circuit voltage between the two midpoints is:

     क8 V ख0 V ग6 V घ4 V
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

437. A 2 hp motor runs at full output for 4 hours. Taking 1 hp = 746 W and ignoring losses, the energy delivered is about:

     क8 kWh ख5.97 kWh ग1.49 kWh घ2.98 kWh
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

438. One joule of electrical energy is equal to one:

     कwatt-hour खwatt-second गkilowatt-second घvolt-ampere-hour
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

439. The colour rendering index (CRI) of a light source measures how faithfully it shows the colours of objects. Its maximum value, as for daylight or an incandescent lamp, is:

     क10 ख1 ग100 घ1000
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

440. Compact fluorescent lamps (CFLs) need careful disposal mainly because they contain a small amount of:

     कlead खuranium गsodium घmercury
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।