प्राविधिक – इलेक्ट्रिकल, मेकानिकल र टेलिकम

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

2231. A pure inductor connected to an AC supply:

      कstores energy during one quarter-cycle and returns it to the source in the next खtakes energy only during positive half-cycles गconverts all the energy it receives into heat घstores energy permanently
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2232. In a purely resistive AC circuit, the instantaneous power taken by the resistor:

      कis negative for half of each cycle खis never negative and pulsates at twice the supply frequency गaverages to zero over a cycle घis constant
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2233. A clamp meter is clamped around a two-core cable, enclosing both the live and the neutral conductor of a healthy single-phase load drawing 10 A. It reads about:

      क20 A ख0 A ग14.1 A घ10 A
      💬 टिप्पणी / गल्ती रिपोर्ट (०)

      छलफल / प्रश्न उत्तरमा गल्ती छ

      पठाउनुहोस्

      टिप्पणी जाँचपछि मात्र देखिन्छ।

2234. 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।

2235. 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।

2236. 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।

2237. 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।

2238. 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।

2239. 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।

2240. 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।