MCQOPTIONS
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MCQOPTIONS
This section includes 439 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
_____________ symbol is used for representing dependent energy sources or controlled voltage source that is used as an equivalent electrical source for many electronic devices. |
| A. | Square |
| B. | Circle |
| C. | Diamond |
| D. | Rectangle |
| Answer» D. Rectangle | |
| 252. |
A network or circuit that does not contain any source of emf is known as |
| A. | Active network |
| B. | Linear circuit |
| C. | Bilateral network |
| D. | Passive network |
| Answer» E. | |
| 253. |
Determine the resistance (in ohms) of a 14 m long circular wire when the diameter and the conductivity of the wire are 0.6 m and 12 mho/metre respectively. |
| A. | 1.79 |
| B. | 2.84 |
| C. | 3.64 |
| D. | 4.17 |
| Answer» E. | |
| 254. |
A 12 V automobile light is rated at 30 W. The total charge that flows through the filament in one minute is |
| A. | 30 C |
| B. | 12 C |
| C. | 150 C |
| D. | 180 C |
| Answer» D. 180 C | |
| 255. |
In a series circuit, three resistances of 2 Ω, 4 Ω and 6 Ω are connected to a 12 V DC supply. The voltage across the 4Ω resistance is: |
| A. | 4 V |
| B. | 6 V |
| C. | 2 V |
| D. | 8 V |
| Answer» B. 6 V | |
| 256. |
Based on the property of conductivity, select the odd one from the following.Silver, copper, plastic, aluminium |
| A. | copper |
| B. | aluminium |
| C. | plastic |
| D. | Silver |
| Answer» D. Silver | |
| 257. |
A power supply having output resistance 1.5 Ω supplies a full load current of 500 mA to a 50 Ω load. Determine the percentage voltage regulation of supply? |
| A. | 2% |
| B. | 3% |
| C. | 4% |
| D. | 5% |
| Answer» C. 4% | |
| 258. |
If a resistance of 10 ohms and a capacitance of 1 μF is connected across a 230 V, 50 Hz AC supply, the capacitive reactance of the circuit is |
| A. | 31.83 Ω |
| B. | 3.183 Ω |
| C. | 0.0318 Ω |
| D. | 3183 Ω |
| Answer» E. | |
| 259. |
If we want to replace the following circuit with a simple circuit that has a voltage source and a resistance, what will be the value of that resistance? |
| A. | 14 Ω |
| B. | 12.52 Ω |
| C. | 16.60 Ω |
| D. | 10 Ω |
| Answer» B. 12.52 Ω | |
| 260. |
Find the value of the total current in the following circuit. |
| A. | 4 A |
| B. | 5.25 A |
| C. | 6.5 A |
| D. | 3.5 A |
| Answer» B. 5.25 A | |
| 261. |
If 120 C of charge passes through an electric conductor in 60 sec, the current in the conductor is |
| A. | 0.5 A |
| B. | 2 A |
| C. | 1 A |
| D. | 4 A |
| Answer» C. 1 A | |
| 262. |
Find the total current in the circuit given below. |
| A. | 3 A |
| B. | 2 A |
| C. | 4 A |
| D. | 1 A |
| Answer» B. 2 A | |
| 263. |
From the following parameters, which parameter’s variation will not affect the capacitance of the capacitor? |
| A. | Thickness of the plates |
| B. | Distance between the plates |
| C. | Nature of the dielectric |
| D. | Area of the plates |
| Answer» B. Distance between the plates | |
| 264. |
Find the current flowing through resistor R1? |
| A. | 440 μA |
| B. | 445 mA |
| C. | 442 mA |
| D. | 442 μA |
| Answer» E. | |
| 265. |
In the above circuit the currents I1 and I2 are |
| A. | 6 A, 3 A |
| B. | 3 A, 6 A |
| C. | 4.5 A, 4.5 A |
| D. | 5 A, 4 A |
| Answer» B. 3 A, 6 A | |
| 266. |
In the following circuit determine the equivalent resistance between points A and B. |
| A. | 8.4 Ω |
| B. | 4 Ω |
| C. | 2.5 Ω |
| D. | 6.8 Ω |
| Answer» B. 4 Ω | |
| 267. |
If n resistors with R Ω each as resistance are connected in parallel, then the equivalent resistance of the network is: |
| A. | \(\frac{R}{n}\;{\rm{\Omega }}\) |
| B. | Rn Ω |
| C. | \(\frac{n}{R}\;{\rm{\Omega }}\) |
| D. | n × R Ω |
| Answer» B. Rn Ω | |
| 268. |
A current is said to be alternating when it changes in: |
| A. | Magnitude |
| B. | Direction |
| C. | Both magnitude and direction |
| D. | None of these |
| Answer» D. None of these | |
| 269. |
Calculate the energy efficiency when the input energy is 3000 J and output energy is 1000 J. |
| A. | 0.5 |
| B. | 0.03 |
| C. | 0.3 |
| D. | 0.333 |
| Answer» E. | |
| 270. |
An aluminium conductor, whose resistance is 15 Ω at 40 °C, is heated to 120 °C. If the temperature coefficient of its resistance (RTC) is 0.00333 / °C at 0 °C, then the temperature coefficient of its resistance (RTC) at 40 °C will be _____ / °C. |
| A. | 0.00033 |
| B. | 0.003 |
| C. | 0.0029 |
| D. | 0.0033 |
| Answer» D. 0.0033 | |
| 271. |
A base diffusion layer length is 80 m. Given the sheet resistance of the layer is 100 ohm/square, the resistance of the layer is _______. |
| A. | 1 K ohm |
| B. | 10 ohm |
| C. | 6.4 K ohm |
| D. | 8.8 K ohm |
| Answer» B. 10 ohm | |
| 272. |
Determine the equivalent capacitance (in μF) of the given electrical network. |
| A. | 24.21 |
| B. | 21.25 |
| C. | 26.64 |
| D. | 22.66 |
| Answer» E. | |
| 273. |
A current of 10 A is flowing through a circuit. This is same as _________ |
| A. | 10 Watts |
| B. | 10 Coulombs/second |
| C. | 10 Volts |
| D. | 10 Ohms |
| Answer» C. 10 Volts | |
| 274. |
A conducting wire of length I and resistance R is cut into two equal parts. The two parts are then connected in parallel. The resistance of the combination is |
| A. | R/2 |
| B. | R/4 |
| C. | R |
| D. | 2R |
| Answer» C. R | |
| 275. |
A varistor is made of: |
| A. | Copper |
| B. | Carbon film |
| C. | Carborundum crystals |
| D. | Aluminum |
| Answer» D. Aluminum | |
| 276. |
A capacitor stores 0.4 C of charge at 2 V. Its capacitance is _________. |
| A. | 3.2 F |
| B. | 0.8 F |
| C. | 0.4 F |
| D. | 0.2 F |
| Answer» E. | |
| 277. |
A conductors provides a path for flow of current in circuit due to property of |
| A. | Conductance |
| B. | Reluctance |
| C. | Resistance |
| D. | Inductance |
| Answer» B. Reluctance | |
| 278. |
Ohm’s law is applicable for |
| A. | Conductors only |
| B. | Superconductor only |
| C. | Conductors and semiconductors |
| D. | Semiconductors only |
| Answer» B. Superconductor only | |
| 279. |
Determine the current i at t = 1s for the given network. |
| A. | 3 A |
| B. | 2 mA |
| C. | 1 A |
| D. | 4 A |
| Answer» C. 1 A | |
| 280. |
Find the current through I1, I2, I3 |
| A. | 6A, 4A, 2A |
| B. | 6A, 2A, -4A |
| C. | 4A, 6A, 4A |
| D. | 6A, -2A, 4A |
| Answer» B. 6A, 2A, -4A | |
| 281. |
A coil of resistance 5 ohm and inductance 0.4 H is connected to 50 V DC supply. The energy stored in the field is: |
| A. | 10 J |
| B. | 40 J |
| C. | 80 J |
| D. | 20 J |
| Answer» E. | |
| 282. |
Determine the value of resistance (in Ohms) of a resistor at 40 degree Celsius, when the resistance has a resistance of 10 Ohms at 0 degree Celsius and the temperature coefficient at 0 degree Celsius is 0.04. |
| A. | 20 |
| B. | 23 |
| C. | 24 |
| D. | 26 |
| Answer» E. | |
| 283. |
If the current changes from 4 A to 6 A in 1 sec induces 40 V in a coil, its inductance is: |
| A. | 20 H |
| B. | 6 H |
| C. | 4 H |
| D. | 40 mH |
| Answer» B. 6 H | |
| 284. |
Electromotive force in a circuit: |
| A. | reduces the resistance of the circuit |
| B. | reduces the potential difference |
| C. | Increases the resistance of the circuit |
| D. | maintains the potential difference |
| Answer» E. | |
| 285. |
Consider the following statements pertaining to the resistance of a conductor:1. Resistance can be simply defined as the ratio of voltage across the conductor to the current through the conductor. This is, in fact, Georg Ohm’s law.2. Resistance is a function of voltage and current.3. Resistance is a function of conductor geometry and its conductivity.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 2 and 3 only |
| C. | 1 and 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 286. |
In the given circuit, what is the voltage across 2μF capacitor and the charge stored in it at steady state conditions? |
| A. | 5V, 10 μC |
| B. | 10V, 20 μC |
| C. | 10V, 10 μC |
| D. | 5V, 45 μC |
| Answer» B. 10V, 20 μC | |
| 287. |
Determine the power (in W) delivered by the current source to the given electrical circuit. |
| A. | 29.5 |
| B. | 107.5 |
| C. | 104.2 |
| D. | 93.7 |
| Answer» C. 104.2 | |
| 288. |
Based on the properties of conductivity, select the odd one from the following.Ceramic, PVC, Germanium, Plastic |
| A. | Ceramic |
| B. | PVC |
| C. | plastic |
| D. | Germanium |
| Answer» E. | |
| 289. |
Determine the value of equivalent resistance across nodes A and B. |
| A. | 3 Ω |
| B. | 1.5 Ω |
| C. | 2.5 Ω |
| D. | 4.5 Ω |
| Answer» B. 1.5 Ω | |
| 290. |
Determine the total power delivered (in W) by the voltage source in the circuit given below. |
| A. | 264 |
| B. | 246 |
| C. | 268 |
| D. | 288 |
| Answer» E. | |
| 291. |
A copper wire has a resistance of 10 Ω. It is stretched by one-tenth of its original length. Then its resistance will be: |
| A. | 9 Ω |
| B. | 10 Ω |
| C. | 11 Ω |
| D. | 12.1 Ω |
| Answer» E. | |
| 292. |
A curricular piece of specimen has surface resistance RS. Its diameter is d and the thickness is t. The surface resistivity ρS of the specimen is given by |
| A. | \(\frac{{2{R_s}\pi {d^2}}}{t}\) |
| B. | \(\frac{{{R_s}\pi {d^2}}}{{2t}}\) |
| C. | \(\frac{{{R_s}\pi {d^2}}}{t}\) |
| D. | \(\frac{{{R_s}\pi {d^2}}}{{4t}}\) |
| Answer» E. | |
| 293. |
On what does the value of temperature coefficient of resistance (α) depend? |
| A. | length of material |
| B. | on the nature and temperature of the substance |
| C. | On the area of cross-section |
| D. | on the volume of the substance |
| Answer» C. On the area of cross-section | |
| 294. |
Find the equivalent resistance, Req, looking into the terminals of the following circuit as indicated. |
| A. | 14.4 Ω |
| B. | 12.4 Ω |
| C. | 15.2 Ω |
| D. | 10 Ω |
| Answer» B. 12.4 Ω | |
| 295. |
A device stores 500 J of energy. It releases this energy in the form of an electric current of 40 A, which has a duration of 5 ms. Determine the average voltage across the terminals of the device. |
| A. | 2500 V |
| B. | 250 V |
| C. | 25 V |
| D. | 2.5 V |
| Answer» B. 250 V | |
| 296. |
A precision resistors are |
| A. | carbon composition resistors |
| B. | wire-wound resistors |
| C. | resistors with a negative temperature coefficient |
| D. | resistors with a positive temperature coefficient |
| Answer» C. resistors with a negative temperature coefficient | |
| 297. |
Find the power absorbed by the generalize circuit if v = 10 V. |
| A. | 8.5 W |
| B. | – 85 W |
| C. | – 8.5 W |
| D. | 85 W |
| Answer» C. – 8.5 W | |
| 298. |
Find the resistance of a filament of 60 W lamp at 230 V supply at its working temperature. |
| A. | 1000 Ω |
| B. | 881.66 Ω |
| C. | 990 Ω |
| D. | 981.66 Ω |
| Answer» C. 990 Ω | |
| 299. |
Permeance is analogous to: |
| A. | Conductance |
| B. | Reluctance |
| C. | Inductance |
| D. | Resistance |
| Answer» B. Reluctance | |
| 300. |
Insulation resistance is defined as the opposition to the flow of: |
| A. | Leakage current |
| B. | Voltage |
| C. | Electromotive force |
| D. | Current |
| Answer» B. Voltage | |