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.
| 401. |
In the circuit shown above, the voltage across CD when the switch S is closed is: |
| A. | 150 V |
| B. | 70 V |
| C. | 50 V |
| D. | 100 V |
| Answer» D. 100 V | |
| 402. |
In the diagram below, what is the current in the 3 Ω resistor? |
| A. | 1.438 A |
| B. | 1.325 A |
| C. | 0.824 A |
| D. | 0.711 A |
| Answer» C. 0.824 A | |
| 403. |
In the circuit given below, what is the current flowing in the 6 Ω resistance? |
| A. | 0.22 A |
| B. | 0.55 A |
| C. | 2.22 A |
| D. | 2.775 A |
| Answer» C. 2.22 A | |
| 404. |
In a series combination of several inductors, the equivalent inductance is _______. |
| A. | Equal to the largest inductance of the combination |
| B. | Lower than the largest inductance of the combination |
| C. | Lower than the smallest inductance of the combination |
| D. | Greater than the largest inductance of the combinations |
| Answer» E. | |
| 405. |
A capacitor consists of two similar plates each measuring 10 cm × 10 cm mounted parallel and opposite to each other. The value of capacitance when the distance between them is 1 cm and dielectric used in the air will be __________. |
| A. | 8.854 F |
| B. | 8.854 pF |
| C. | 8.854 μF |
| D. | 8.854 mF |
| Answer» C. 8.854 μF | |
| 406. |
Calculate the value of an unknown resistance when it is connected in parallel to a 250 V supply with a 100-watt, 250 V lamp (assuming that the resistance of the lamp remains unchanged); The total dissipated power in the circuit is 1100 watts. |
| A. | 38 Ω |
| B. | 62.5 Ω |
| C. | 24 Ω |
| D. | 20 Ω |
| Answer» C. 24 Ω | |
| 407. |
A lamp of 100 W at 200 V is supplied current at 100 volts. It is equivalent to lamp of |
| A. | 20 W |
| B. | 25 W |
| C. | 50 W |
| D. | 75 W |
| Answer» C. 50 W | |
| 408. |
Let dq be the differential charge, dw be the differential energy. The rate of change of energy with time is given as: |
| A. | \(\frac{{dw}}{{dq}} \times \frac{{dq}}{{dt}}\) |
| B. | \(\frac{{dw}}{{dq}} + \frac{{dq}}{{dt}}\) |
| C. | \(\frac{{dw}}{{dq}}/\frac{{dq}}{{dt}}\) |
| D. | \(\frac{{dq}}{{dw}} \times \frac{{dq}}{{dt}}\) |
| Answer» B. \(\frac{{dw}}{{dq}} + \frac{{dq}}{{dt}}\) | |
| 409. |
A passive element in a circuit is one which |
| A. | supplies energy |
| B. | receives energy |
| C. | both supplies and receives energy |
| D. | none of these |
| Answer» C. both supplies and receives energy | |
| 410. |
Determine the current supplied by the battery: |
| A. | 0.5 A |
| B. | 3 A |
| C. | 2.5 A |
| D. | 1 A |
| Answer» B. 3 A | |
| 411. |
Determine the power p4 supplied or absorbed by the current source for the following circuit. |
| A. | 24 W absorbed |
| B. | 8 W absorbed |
| C. | 24 W supplied |
| D. | 8 W supplied |
| Answer» E. | |
| 412. |
Determine the energy stored (in J) by a 5 H inductor, when the current flowing through the inductor is 6 A. |
| A. | 94 |
| B. | 90 |
| C. | 60 |
| D. | 40 |
| Answer» C. 60 | |
| 413. |
Find the current flowing through resistor R3? |
| A. | 1.95 mA |
| B. | 2.5 mA |
| C. | 2 mA |
| D. | 1.55 mA |
| Answer» B. 2.5 mA | |
| 414. |
Lamps of 40 W, 100 W and 200 W ratings are connected in different phases of a 3 phase, 4 wire supply. If the neutral wire breaks, then the lamp likely to fuse first will be: |
| A. | 200 W |
| B. | 40 W |
| C. | 100 W |
| D. | all lamps |
| Answer» C. 100 W | |
| 415. |
In an AC circuit, the ratio of kW/kVA represents |
| A. | Power factor |
| B. | Form factor |
| C. | Load factor |
| D. | Diversity factor |
| Answer» B. Form factor | |
| 416. |
An electric heater is connected across 230 V and it draws a current of 2 A. Then the resistance offered by the heater is? |
| A. | 230 ohm |
| B. | 23 ohm |
| C. | 11.5 ohm |
| D. | 115 ohm |
| Answer» E. | |
| 417. |
Inductance of coil is directly proportional to |
| A. | thickness of wire |
| B. | spacing between adjacent turns |
| C. | cross-sectional area |
| D. | number of turns |
| Answer» D. number of turns | |
| 418. |
If a number of capacitors are connected in series, then the total capacitance of the combination will be ____________. |
| A. | greater than the capacitance of the largest capacitor |
| B. | The average of the capacitances of all the capacitors |
| C. | greater than the capacitance of any individual capacitor |
| D. | smaller than the capacitance of the smallest capacitor |
| Answer» E. | |
| 419. |
If R1 is in series with parallel connected to R2 & R3, what happens to total current if R2 opens |
| A. | Increase |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes Zero |
| Answer» C. Remains the same | |
| 420. |
Determine the value of current I1 in the following circuit. |
| A. | 6 A |
| B. | -4 A |
| C. | 12 A |
| D. | -6 A |
| Answer» D. -6 A | |
| 421. |
Given the current i and voltage v of a circuit element, the power p and energy w are given by: |
| A. | \(p = \int_0^t \ pd \tau\)w = v.i.t |
| B. | p = v.i.t and \(w = \int_o^t \ pd\tau\) |
| C. | p = v.i\(w = \int_0^t \ pd\tau\) |
| D. | \(p = \int^t_0 pd\tau\)w = v.i |
| Answer» D. \(p = \int^t_0 pd\tau\)w = v.i | |
| 422. |
Battery under discharging condition will be considered as a/an: |
| A. | Passive element |
| B. | Active element |
| C. | Ideal current source |
| D. | Ideal voltage source |
| Answer» C. Ideal current source | |
| 423. |
Find the currents i1 and i2 whose relations in an electric circuit are given as: 4i1 – 3i2 = 1; 3i1 – 5i2 = 2 |
| A. | \({i_1} = - \frac{5}{{11}}\) and \({i_2} = - \frac{1}{{11}}\) |
| B. | \({i_1} = \frac{1}{{11}}\) and \({i_2} = \frac{5}{{11}}\) |
| C. | \({i_1} = - \frac{1}{{11}}\) and \({i_2} = - \frac{5}{{11}}\) |
| D. | \({i_1} = \frac{5}{{11}}\) and \({i_1} = \frac{1}{{11}}\) |
| Answer» D. \({i_1} = \frac{5}{{11}}\) and \({i_1} = \frac{1}{{11}}\) | |
| 424. |
Capacitance of a capacitor is given by: |
| A. | \({\rm{C}} = \frac{{{{\rm{\varepsilon }}_0}{\varepsilon _r}d}}{A}\) |
| B. | \(C = \frac{{\mu A}}{d}\) |
| C. | \(C = \frac{A}{d}\) |
| D. | \({\rm{C}} = \frac{{{{\rm{\varepsilon }}_0}{\varepsilon _r}A}}{d}\) |
| Answer» E. | |
| 425. |
Amount of current flowing in the circuit having 12 V battery source and a single resistor of resistance 24 kΩ. |
| A. | 50 mA |
| B. | 288 kA |
| C. | 2 kA |
| D. | 500 μA |
| Answer» E. | |
| 426. |
If the capacity of a battery is 2800 mAh, it can supply 1.4 A current for |
| A. | 200 minutes |
| B. | 100 minutes |
| C. | 120 minutes |
| D. | 240 minutes |
| Answer» D. 240 minutes | |
| 427. |
If Ra, Rb and Rc are 20 Ω, 10 Ω and 10 Ω respectively are connected in delta connection. The resistances R1, R2 and R3 in Ω of an equivalent star connection are |
| A. | 2.5, 5, 5 |
| B. | 5, 2.5, 5 |
| C. | 5, 5, 2.5 |
| D. | 2.5, 5, 2.5 |
| Answer» D. 2.5, 5, 2.5 | |
| 428. |
______ is an example of an active electronic component. |
| A. | Resistor |
| B. | Transistor |
| C. | Capacitor |
| D. | Inductor |
| Answer» C. Capacitor | |
| 429. |
A 12 V battery with an internal resistance 0.5 ohms feeds a series circuit containing 20 ohms, 10 ohms, and R. Find the value of R if the current in the circuit is 0.2A. |
| A. | 14.5 ohms |
| B. | 29.5 ohms |
| C. | 4.5 ohms |
| D. | 5.5 ohms |
| Answer» C. 4.5 ohms | |
| 430. |
Find the current in the 3 kΩ resistor in the following circuit. |
| A. | 6 mA |
| B. | 2 mA |
| C. | 3 mA |
| D. | 11 mA |
| Answer» C. 3 mA | |
| 431. |
A 2Ω resistor and 1Ω resistor are connected in series to a 6V cell. What is the power dissipated in the 2Ω resistor? |
| A. | 10W |
| B. | 8W |
| C. | 12W |
| D. | None of the above |
| Answer» C. 12W | |
| 432. |
An element consumes ‘W’ energy in joules for a time period ‘t’ seconds. What is the power of the electrical energy given to the element? |
| A. | W / t Watt |
| B. | W – t Watt |
| C. | W × t Watt |
| D. | Wt Watt |
| Answer» B. W – t Watt | |
| 433. |
An electric heater of 200 V, 1000 W rating uses a nichrome wire of resistance of 0.5 Ω/m. The required length of wire will be: |
| A. | 400 m |
| B. | 50 m |
| C. | 80 m |
| D. | 200 m |
| Answer» D. 200 m | |
| 434. |
For a given conductor, if the cross-sectional area increases, then: |
| A. | resistance of the conductor increases |
| B. | resistance of the conductor decreases |
| C. | current rating of the conductor decreases |
| D. | resistance of the conductor does not change |
| Answer» C. current rating of the conductor decreases | |
| 435. |
An element is said to have negative resistance when |
| A. | The element has negative temperature coefficient |
| B. | The current / voltage curve has negative slope |
| C. | The element has negative specific resistance |
| D. | The current / voltage curve has a positive slope |
| Answer» C. The element has negative specific resistance | |
| 436. |
Electrical resistance provides ______ for the flow of electric current. |
| A. | Conductance |
| B. | Opposition |
| C. | a path |
| D. | voltage |
| Answer» C. a path | |
| 437. |
If we were 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. | 12.33 Ω |
| B. | 16 Ω |
| C. | 10 Ω |
| D. | 22 Ω |
| Answer» C. 10 Ω | |
| 438. |
Find the total current in the circuit shown. |
| A. | 2 A |
| B. | 1 A |
| C. | 1.5 A |
| D. | 0.5 A |
| Answer» C. 1.5 A | |
| 439. |
Crest factor for an alternating current source is the ratio of |
| A. | Maximum value to RMS value |
| B. | RMS value to Maximum value |
| C. | RMS value to Average value |
| D. | Maximum value to Average value |
| Answer» B. RMS value to Maximum value | |