MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The resistance of a thermistor decreases with increases in __________ |
| A. | temperature |
| B. | circuit |
| C. | light control |
| D. | sensors |
| Answer» C. light control | |
| 2. |
In the figures given below, Value of RA, RB and RC are 20 Ω, 10 Ω and 10 Ω respectively. The resistances R1, R2 and R3 in Ω are ________ |
| A. | 2.5, 5 and 5 |
| B. | 5, 2.5 and 5 |
| C. | 5, 5 and 2.5 |
| D. | 2.5, 5 and 2.5 |
| Answer» B. 5, 2.5 and 5 | |
| 3. |
If A = 3 + j1, then A4 is equal to __________ |
| A. | 3.16 ∠18.4° |
| B. | 100 ∠73.72° |
| C. | 100 ∠18.4° |
| D. | 3.16 ∠73.22° |
| Answer» C. 100 ∠18.4° | |
| 4. |
In the circuit shown below, the voltage V will be __________ |
| A. | – 3V |
| B. | Zero |
| C. | 3 V |
| D. | 5 V |
| Answer» B. Zero | |
| 5. |
For making a capacitor, the dielectric should have __________ |
| A. | High relative permittivity |
| B. | Low relative permittivity |
| C. | Relative permittivity = 1 |
| D. | Relative permittivity neither too high nor too low |
| Answer» B. Low relative permittivity | |
| 6. |
If operator ‘a’ = 1 ∠120°. Then (1 – a) is equal to ____________ |
| A. | is equal to ____________a) \(\sqrt{3}\) |
| B. | \(\sqrt{3}\)∠-30° |
| C. | \(\sqrt{3}\)∠30° |
| D. | \(\sqrt{3}\)∠60° |
| Answer» C. \(\sqrt{3}\)∠30° | |
| 7. |
In the circuit given below, RI = 1 MΩ, RO = 10 Ω, A = 106 and VI = 1μV. Then the output voltage, input impedance and output impedance respectively are _________ |
| A. | 1 V, ∞ and 10 Ω |
| B. | 1 V, 0 and 10 Ω |
| C. | 1V, 0 and ∞ |
| D. | 10 V, ∞ and 10 Ω |
| Answer» B. 1 V, 0 and 10 Ω | |
| 8. |
An AC source of RMS voltage 20 V with internal impedance ZS = (1+2j) Ω feeds a load of impedance ZL = (7+4j) Ω in the circuit given below. The reactive power is _________ |
| A. | 8 VAR |
| B. | 16 VAR |
| C. | 28 VAR |
| D. | 32 VAR |
| Answer» C. 28 VAR | |
| 9. |
For the circuit given below, the current I in the circuit is ________ |
| A. | –j1 A |
| B. | J1 A |
| C. | Zero |
| D. | 20 A |
| Answer» B. J1 A | |
| 10. |
For the two circuits shown below, the relation between IA and IB is ________ |
| A. | IB = IA + 6 |
| B. | IB = IA + 2 |
| C. | IB = 1.5IA |
| D. | IB = IA |
| Answer» D. IB = IA | |
| 11. |
A 1 μF capacitor is connected to 12 V batteries. The energy stored in the capacitor is _____________ |
| A. | 12 x 10-6 J |
| B. | 24 x 10-6 J |
| C. | 60 x 10-6 J |
| D. | 72 x 10-6 J |
| Answer» E. | |
| 12. |
A two branch circuit has a coil of resistance R1, inductance L1 in one branch and capacitance C2 in the second branch. If R is increased, the dynamic resistance is going to ___________ |
| A. | Increase |
| B. | Decrease |
| C. | Remains constant |
| D. | May increase or decrease |
| Answer» C. Remains constant | |
| 13. |
D is the distance between the plates of a parallel plate capacitor. The dielectric constants are ∈1 and ∈2 respectively. The total capacitance is proportional to ____________ |
| A. | \(\frac{∈_1 ∈_2}{∈_1+∈_2}\) |
| B. | ∈1 – ∈2 |
| C. | \(\frac{∈_1}{∈_2}\) |
| D. | ∈1 ∈2 |
| Answer» B. ∈1 – ∈2 | |
| 14. |
A capacitor, used for power factor correction in a single phase circuit decreases which of the following? |
| A. | Power factor |
| B. | Line current |
| C. | Both Line current and Power factor |
| D. | Neither Line current nor Power factor |
| Answer» C. Both Line current and Power factor | |
| 15. |
Branch current and loop current relation is expressed in matrix form shown below, where Ij represents branch current and Ik represents loop current.[I1; I2; I3; I4; I5; I6; I7; I8] = [0 0 1 0; -1 -1 -1 0; 0 1 0 0; 1 0 0 0; 0 0 -1 -1; 1 1 0 -1; 1 0 0 0; 0 0 0 1] [I1; I2; I3; I4]The rank of the incidence matrix is? |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | 8 |
| Answer» B. 5 | |