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.
| 301. |
Find the voltage across a-b (Vab). |
| A. | 3.6 V |
| B. | 4.8 V |
| C. | 1.5 V |
| D. | -1.5 V |
| Answer» B. 4.8 V | |
| 302. |
A 3 Ω resistance is in parallel with the current source of I/3 A. This parallel combination in series with the resistance of R ohms. A voltage of V volts is applied to this circuit and total current taken by the circuit is I A and the direction is same as current source. The effective resistance faced by the voltage source is: |
| A. | 1 + R Ω |
| B. | 3 + R Ω |
| C. | 2 + R Ω |
| D. | 3.3 + R Ω |
| Answer» D. 3.3 + R Ω | |
| 303. |
Kirchhoff's current law (KCL) is applicable to networks that are _____ |
| A. | unilateral or bilateral |
| B. | active or passive |
| C. | linear or non-linear |
| D. | all the above |
| Answer» E. | |
| 304. |
A dry cell chemical reaction needed 90 Joules of work to produce 15 coulombs of charge separation between the battery terminals. Find the terminal voltage of the battery. |
| A. | 8 V |
| B. | 6 V |
| C. | 4 V |
| D. | 5 V |
| Answer» C. 4 V | |
| 305. |
According to fuse law, the current carrying capacity varies as |
| A. | diameter |
| B. | (diameter)1.5 |
| C. | \({\left( {{\rm{diameter}}} \right)^{\frac{1}{2}}}\) |
| D. | \(\frac{1}{{diameter}}\) |
| Answer» C. \({\left( {{\rm{diameter}}} \right)^{\frac{1}{2}}}\) | |
| 306. |
If four 10 μF capacitors are connected in parallel, the net capacitance will be: |
| A. | 30 μF |
| B. | 40 μF |
| C. | 20 μF |
| D. | 2.5 μF |
| Answer» C. 20 μF | |
| 307. |
A circuit in which resistances are connected end to end so that there is only one path for current to flow is called a _____. |
| A. | Neither series nor parallel circuit |
| B. | Series-parallel circuit |
| C. | Series circuit |
| D. | Parallel circuit |
| Answer» D. Parallel circuit | |
| 308. |
In the diagram below, what is the electric current in the 3 Ω resistor? |
| A. | 3 A |
| B. | 4 A |
| C. | 4.12 A |
| D. | 1 A |
| Answer» C. 4.12 A | |
| 309. |
In the following circuit the ratio of heat produced in resistor R1 to the heat produced in resistor R3 is |
| A. | 25 : 10 |
| B. | 25 : 18 |
| C. | 20 : 14 |
| D. | 1 : 4 |
| Answer» C. 20 : 14 | |
| 310. |
Find the conductance of a short circuit on 100 V, which results in a short circuit current of 500 A. |
| A. | 0.2 S |
| B. | 0.2 Ω |
| C. | 5 Ω |
| D. | 5 S |
| Answer» E. | |
| 311. |
1 kΩ resistor is connected across three identical 2V cells connected in parallel. What is the current through the resistor? |
| A. | 4 mA |
| B. | 3.5 mA |
| C. | 4.5 mA |
| D. | 2 mA |
| Answer» E. | |
| 312. |
Find the voltage across resistor R3? |
| A. | 2.922 V |
| B. | 2.5 V |
| C. | 3.5 V |
| D. | 2.078 V |
| Answer» B. 2.5 V | |
| 313. |
1 watt is equal to: |
| A. | 1 Newton−meter−second |
| B. | 1 Newton−second/meter |
| C. | 1 Newton/meter−second |
| D. | 1 Newton−meter/second |
| Answer» E. | |
| 314. |
Determine the value of current l3 (in A) for the diagram given below. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 315. |
Dependent sources are also called _________. |
| A. | Uncontrolled sources |
| B. | Time response elements |
| C. | Steady-state elements |
| D. | Controlled sources |
| Answer» E. | |
| 316. |
Four 100 W bulbs are connected in parallels across 200 V supply line. If one bulb gets fused |
| A. | no bulb will light |
| B. | all the four bulbs will light |
| C. | rest of the three bulbs will light |
| D. | none of the above |
| Answer» D. none of the above | |
| 317. |
A practical voltage source consists of an ideal voltage source in |
| A. | Series with internal resistance |
| B. | Parallel with internal resistance |
| C. | Series with impedance |
| D. | Series with capacitance |
| Answer» B. Parallel with internal resistance | |
| 318. |
A voltage will influence current only if the circuit is |
| A. | Open |
| B. | Insulated |
| C. | High resistance |
| D. | Closed |
| Answer» E. | |
| 319. |
In the circuit shown, find the equivalent resistance between A and B. |
| A. | 75 ohm |
| B. | 100 ohm |
| C. | 50 ohm |
| D. | 150 ohm |
| Answer» B. 100 ohm | |
| 320. |
A nickel coil has a resistance of 13 Ω at 50°C. If the temperature coefficient of resistance at 0°C is 0.006/°C, the resistance at 0°C is: |
| A. | 16.9 Ω |
| B. | 10 Ω |
| C. | 43.3 Ω |
| D. | None of these |
| Answer» C. 43.3 Ω | |
| 321. |
A 100 watt light bulb burns on an average of 10 hours a day for one week. The weekly consumption of energy will be |
| A. | 7 units |
| B. | 70 units |
| C. | 0.7 units |
| D. | 0.07 units |
| Answer» B. 70 units | |
| 322. |
__________ is the measuring unit of inductive susceptance. |
| A. | Henry |
| B. | Mho |
| C. | Weber |
| D. | Tesla |
| Answer» C. Weber | |
| 323. |
A 6 V battery is connected to a 300Ω load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load? |
| A. | 1000 h |
| B. | 2000 h |
| C. | 200 h |
| D. | 4000 h |
| Answer» C. 200 h | |
| 324. |
Find the current in an element when the charge entering the element is q(t) = 10 e-t C. |
| A. | 10 et A |
| B. | -10e-t A |
| C. | 10 A |
| D. | -10 A |
| Answer» C. 10 A | |
| 325. |
A 40 W tube light is in parallel with a room heater on a main line. What happens when the light is switched off. |
| A. | the heater output remains the same |
| B. | the heater output is larger |
| C. | the heater output is smaller |
| D. | none |
| Answer» B. the heater output is larger | |
| 326. |
Observe the given network and answer the question. The potential at point a =? |
| A. | E1 – I1 R1 and I3 R3 |
| B. | I2 R2 |
| C. | I3 R3 |
| D. | E1 – I1 R2 |
| Answer» B. I2 R2 | |
| 327. |
Kirchhoff’s voltage law is concerned with |
| A. | IR drop |
| B. | Battery e.m.f. |
| C. | Junction voltage |
| D. | Both (a) and (b) |
| Answer» E. | |
| 328. |
In the circuit shown above, the equivalent resistance across A and B will be: |
| A. | 5 ohms |
| B. | 15 ohms |
| C. | 10 ohms |
| D. | 1 ohms |
| Answer» B. 15 ohms | |
| 329. |
A 1 H pure inductor carrying a current of 3 A will store ________ energy. |
| A. | 4.5 W |
| B. | 9 J |
| C. | 9 W |
| D. | 4.5 J |
| Answer» E. | |
| 330. |
Electric current may be defined as |
| A. | Rate of transfer of electric charge |
| B. | Velocity of charge |
| C. | Capacity to store charges |
| D. | Charging of battery |
| Answer» B. Velocity of charge | |
| 331. |
In the network shown in the given figure, the value of (number of junctions)/(number of branches) is: |
| A. | 1/2 |
| B. | 4/3 |
| C. | 2/3 |
| D. | 3/4 |
| Answer» D. 3/4 | |
| 332. |
Find the value of current (in A) through the load resistance (RL) in the given circuit diagram? |
| A. | 2.2 |
| B. | 1.3 |
| C. | 2.6 |
| D. | 2.25 |
| Answer» C. 2.6 | |
| 333. |
According to Ohm’s law: |
| A. | The voltage is constant to current |
| B. | The voltage is proportional to current |
| C. | Voltage is inversely proportional to current |
| D. | The voltage is proportional to resistance |
| Answer» C. Voltage is inversely proportional to current | |
| 334. |
In a simple DC circuit with a constant voltage, with the resistance increases, the current will |
| A. | decrease |
| B. | stop |
| C. | increase |
| D. | remain constant |
| Answer» B. stop | |
| 335. |
A capacitor is charged by a constant current of 2 mA and results in a voltage increase of 12 V in a 10 sec interval. The value of capacitance is- |
| A. | 0.75 mF |
| B. | 1.33 mF |
| C. | 0.6 mF |
| D. | 1.67 mF |
| Answer» E. | |
| 336. |
Cells are connected in series in order to increase the |
| A. | Current capacity |
| B. | Life of the cells |
| C. | Voltage rating |
| D. | Terminal voltage |
| Answer» D. Terminal voltage | |
| 337. |
Eight cells are connected in series to an external resistance of 4 ohms but one of the cells is connected in opposition. If the emf and internal resistance of each cell are 2 volts and 2 ohms respectively, the current in the resistor of 4 ohms will be: |
| A. | 0.6 |
| B. | 0.75 |
| C. | 1.0 |
| D. | 2.0 |
| Answer» B. 0.75 | |
| 338. |
Here are two threads B and C having the same cross-section and are made of the same material.RB = 500 Ω and RC =100 Ω. The number of times B is longer than C is ________. |
| A. | 1 |
| B. | 5 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 339. |
For the given circuit find the value of v at t = 12 ms. If current is given as i = 10te^(-100t) A. (Where L= 25 mH). |
| A. | 34.09 mV |
| B. | -0.987 mV |
| C. | -15.06 mV |
| D. | 87.99 mV |
| Answer» D. 87.99 mV | |
| 340. |
Find the odd one from the following. |
| A. | Hardness |
| B. | Ductility |
| C. | Resistivity |
| D. | Tensile strength |
| Answer» D. Tensile strength | |
| 341. |
In DC circuit, which of the following components is used to reduce the load voltage? |
| A. | Resistor |
| B. | Inductor |
| C. | Reactor |
| D. | Capacitor |
| Answer» B. Inductor | |
| 342. |
Power dissipated in the circuit given is 9 W. Value of E will be: |
| A. | 2 V |
| B. | 4 V |
| C. | 6 V |
| D. | 8 V |
| Answer» D. 8 V | |
| 343. |
An electric current is a flow of: |
| A. | neutral charges only |
| B. | negative charges only |
| C. | positive charge only |
| D. | both positive and negative charges |
| Answer» E. | |
| 344. |
A resistor has potential difference of 50.0 V across its terminals and 120.0 C of charge per minute passes a fixed point. Under these conditions at what rate is electric energy converted to heat? |
| A. | 6000 J/sec |
| B. | 120 J/sec |
| C. | 100 J/sec |
| D. | 2.4 J/sec |
| Answer» D. 2.4 J/sec | |
| 345. |
If two or more components are connected in _________, they have the same potential difference (voltage) across their ends. |
| A. | Series |
| B. | Parallel |
| C. | Opposite |
| D. | Parallel - Series |
| Answer» C. Opposite | |
| 346. |
_______ is defined as the unit of energy in joules which equals to the amount of work to be done for bringing one electron against an electric field of potential difference 1 volt. |
| A. | 1 V |
| B. | 1 kWh |
| C. | 1 eV |
| D. | 1 W |
| Answer» D. 1 W | |
| 347. |
Copper has a resistivity of 17 × 10-9 Ωm. What is the end to end resistance of a copper strip, 2 cm long with cross-sectional dimensions 5 mm × 1 mm? |
| A. | 34 μΩ |
| B. | 68 μΩ |
| C. | 34 mΩ |
| D. | 68 mΩ |
| Answer» C. 34 mΩ | |
| 348. |
If two 5-μF capacitors are connected in parallel, then the effective capacitance will be ___________. |
| A. | 2.5 μF |
| B. | 25 μF |
| C. | 10 μF |
| D. | 20 μF |
| Answer» D. 20 μF | |
| 349. |
In the following dc circuit, determine the current of branch A - B |
| A. | 6.85 A |
| B. | 5.75 A |
| C. | 4 A |
| D. | 8.6 A |
| Answer» C. 4 A | |
| 350. |
Find the net capacitance of the combination in which ten capacitors of 10 μF are connected in parallel. |
| A. | 50 μF |
| B. | 1 μF |
| C. | 0.1 μF |
| D. | 100 μF |
| Answer» E. | |