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

671. Kirchhoff's current and voltage laws are applicable to:

     कlinear circuits only खlinear as well as non-linear circuits गDC circuits only घcircuits containing resistors only
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

672. The equivalent resistance of resistors connected in parallel is always:

     कgreater than the largest individual resistance खequal to the average of the resistances गless than the smallest individual resistance घequal to the sum of the resistances
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

673. Two identical lamps are connected in series across a supply. If one lamp is short-circuited, the other lamp:

     कgoes off खglows dimmer गglows with unchanged brightness घglows brighter
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

674. In a series circuit containing a lamp, a switch and a battery, the voltage measured across the open switch is:

     कzero खhalf the battery voltage गequal to the lamp's rated voltage only when it is on घequal to the battery voltage
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

675. Air breaks down at an electric field of about 3 kV/mm. The approximate maximum voltage that a 2 mm air gap between parallel plates can withstand is:

     क6 kV ख1.5 kV ग3 kV घ60 kV
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

676. In the two-wattmeter method of measuring power in a balanced three-phase load of zero power factor, the two wattmeters read:

     कequal positive values खequal values of opposite sign गzero and a positive value घzero each
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

677. A lighting circuit is protected by a 10 A fuse on a 230 V supply. The maximum number of 100 W lamps that can be run on it is:

     क10 ख100 ग23 घ43
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

678. Using four resistors of 4 Ω each, an equivalent resistance of 3 Ω is obtained by:

     कconnecting all four in parallel खconnecting two in series and the pair in parallel with the other two in series गconnecting three in series and the combination in parallel with the fourth घconnecting two in parallel and the pair in series with the other two in parallel
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

679. Three identical capacitors are connected first in series and then in parallel across the same DC voltage. The ratio of the energy stored in the series connection to that in the parallel connection is:

     क1 : 3 ख3 : 1 ग9 : 1 घ1 : 9
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।

680. A conductor has a temperature coefficient of resistance of 0.004 per °C referred to 0 °C. At what temperature will its resistance be twice its value at 0 °C?

     क250 °C ख200 °C ग400 °C घ500 °C
     💬 टिप्पणी / गल्ती रिपोर्ट (०)

     छलफल / प्रश्न उत्तरमा गल्ती छ

     पठाउनुहोस्

     टिप्पणी जाँचपछि मात्र देखिन्छ।