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Network Theory Questions and Answers – Basic Network Concepts Next »

This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Basic Network Concepts”. 1. Energy per unit charge is ____________ a) Power b) Voltage c) Current d) Capacitance View Answer Answer: b Explanation: The work or energy per unit charge utilised in the process of separation of charges is known as Voltage or Potential dierence. The phenomenon of transfer of charge from one point to another is termed Current. The rate at which the work is done is called Power. Charge per unit voltage is Capacitance. advertisement

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2. A conductor is said to have resistance of one ohm if a potential dierence of one volt across its terminals causes a current of X ampere to ow through it. What will be the value of X? a) 4 b) 2 c) 3 d) 1 View Answer Answer: d Explanation: Ohm’s law states that the potential dierence (voltage) across a conductor is proportional to the current through it. The constant of proportionality is called the Resistance(R). According to Ohm’s law, V = IR (where V is the potential dierence between two points which include a resistance R). –> I = V/R = 1V/1 Ω = 1A. 3. Resistance depends on the temperature of the conductor. a) True b) False View Answer Answer: a Explanation: Resistance is directly proportional to its length, inversely proportional to the area of cross section of the conductor, depends on the nature of the material and on the temperature of the conductor. advertisement

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4. A 25 Ω resistor has a voltage of 150 sin377 t. Find the corresponding power. a) 900 sin2 337 t b) 90 sin2 337 t c) 900 sin 2 377 t d) 9 sin2 337 t View Answer Answer: c Explanation: Given R = 25 Ω and v = 150 sin 377 t i= = 6 sin 377 t p = vi = (150 sin 377 t)(6 sin 377 t) = 900 sin2 377 t. 5. Unit of inductance is ________ a) Weber b) Henry c) Farad d) Tesla View Answer Answer: b Explanation: The unit of inductance is Henry. Weber is the unit of magnetic ux. Tesla is the unit of ux density. Farad is the unit of capacitance. advertisement

6. Inductance of an inductor is inversely proportional to its ___________

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b) Area of cross section c) Absolute permeability d) Length View Answer Answer: d 2

Explanation: Inductance of an inductor, L = µN A/l From the above equation, Inductance of an inductor is inversely proportional to its length. 7. Energy stored in an inductor is ________ a) LI 2 b) LI c) LI/2 2 d) LI /2 View Answer Answer: d Explanation: V = L dE = Vidt = L E=

= Lidt .

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8. An inductor of 3mH has a current i = 5(1 – e-5000t ). Find the corresponding maximum energy stored.

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c) 37.5 kJ d) 3.75 mJ View Answer Answer: a -5000t Explanation: Given L = 3 mH, i = 5(1 – e ) V=L I = i(∞) = 5(1 – e-∞ ) = 5 A E=

LI2 = 0.5 × 3 × 10-3 × 52 = 37.5 mJ.

9. The capacitance of a capacitor does not depend on the absolute permittivity of the medium between the plates. a) True b) False View Answer

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10. Which of the following is not the energy stored in a capacitor? a) b) c) d) View Answer

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Answer: d Explanation: Energy stored in a capacitor, E = Since C = Q/V E=

.

11. A voltage is dened by

for

respectivelyand is applied to the

10 µF capacitor. Which of the following is incorrect? a) i = 0 for t < 0 b) i = 20µA for 0 < t < 2s c) i = 40et-2µA for t > 2s d) i = -40et-2µA for t > 2s View Answer Sanfoundry Global Education & Learning Series – Network Theory. To practice all areas of Network Theory, here is complete set of 1000+ Multiple Choice Questions and Answers. Participate in the Sanfoundry Certication contest to get free Certicate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Telegram | Youtube | LinkedIn | Instagram | Facebook | Twitter | Pinterest » Next - Network Theory Questions and Answers – Sources and Some Denitions

Network Theory MCQ

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Recommended Articles: 1. Network Theory Questions and Answers – Advanced Problems on Network Theory – 1 2. Network Theory Questions and Answers – Advanced Problems on Network Theorems – 1 3. Network Theory Questions and Answers – Advanced Problems on Network Theorems – 2 4. Network Theory Questions and Answers – Circuit Elements and Kirchho’s Laws 5. Network Theory Questions and Answers – Sources and Some Denitions 6. Network Theory Questions and Answers – Kirchho’s Current Law 7. Network Theory Questions and Answers – Advanced Problems on Network Theory – 2 8. Basic Electrical Engineering Questions and Answers – Kirchho’s Laws and Network Solution 9. Network Theory Questions and Answers – Apparent Power and Power Factor 10. Network Theory Questions and Answers – Tellegen’s theorem advertisement

Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Sto Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter

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