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
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A lamp rated 60 W, 230 V draws a current of approximately:
सही उत्तर: घ) 0.26 A
I = P / V = 60 / 230 = 0.26 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The power dissipated in a resistor R carrying a current I is given by:
सही उत्तर: घ) I^2 R
P = V I and V = I R, so P = I^2 R (also V^2 / R).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Kirchhoff's Voltage Law (KVL) is based on the principle of conservation of:
सही उत्तर: घ) energy
KVL states that the algebraic sum of voltages around a closed loop is zero, which follows from conservation of energy.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A total current of 9 A divides between parallel resistors of 3 ohm and 6 ohm. The current through the 6 ohm resistor is:
सही उत्तर: ग) 3 A
By the current-divider rule, I6 = 9 x 3 / (3 + 6) = 3 A; the smaller resistor carries the larger current (6 A).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Resistors of 2 kilo-ohm and 3 kilo-ohm are connected in series across a 10 V supply. The voltage across the 3 kilo-ohm resistor is:
सही उत्तर: ग) 6 V
By the voltage-divider rule, V = 10 x 3 / (2 + 3) = 6 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Resistors of 4 ohm and 12 ohm are connected in parallel, and this combination is connected in series with a 2 ohm resistor. The total resistance is:
सही उत्तर: ख) 5 ohm
4 || 12 = (4 x 12)/(4 + 12) = 3 ohm; adding 2 ohm in series gives 5 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Three resistors of 6 ohm each are connected in parallel. The equivalent resistance is:
सही उत्तर: ख) 2 ohm
For n equal resistors in parallel, R_eq = R / n = 6 / 3 = 2 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A cell of emf 2 V and internal resistance 0.2 ohm delivers a current of 1 A. Its terminal voltage is:
सही उत्तर: ग) 1.8 V
V = E - I r = 2 - 1 x 0.2 = 1.8 V.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 12 V battery with internal resistance 0.5 ohm is connected to a 5.5 ohm load. The current drawn is:
सही उत्तर: ख) 2 A
I = E / (R + r) = 12 / (5.5 + 0.5) = 12 / 6 = 2 A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A copper coil has resistance 10 ohm at 0 °C. Taking the temperature coefficient at 0 °C as 0.004 per °C, its resistance at 50 °C is:
सही उत्तर: ख) 12 ohm
R = R0(1 + alpha t) = 10 (1 + 0.004 x 50) = 10 x 1.2 = 12 ohm.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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