MCQOPTIONS
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MCQOPTIONS
This section includes 23 Mcqs, each offering curated multiple-choice questions to sharpen your Networks Analysis and Synthesis knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In an R-L-C circuit, v(t) = 20 sin (314 t + 5 p/6) and i(t) = 10 sin (314 t + 2p/3). The p.f of the circuit is |
| A. | 0.5 lead |
| B. | 0.866 lag |
| C. | 0.866 lead |
| D. | 0.5 lead |
| Answer» C. 0.866 lead | |
| 2. |
A circuit is replaced by its Thevenin's equivalent to find current through a certain branch. If VTH = 10 V and RTH = 20 , the current through the branch |
| A. | will always be 0.5 A |
| B. | will always be less than 0.5 A |
| C. | will always be equal to or less than 0.5 A |
| D. | may be 0.5 A or more or less |
| Answer» D. may be 0.5 A or more or less | |
| 3. |
A two branch parallel tuned circuit has a coil of resistance 100 and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency is |
| A. | 100 rad/sec |
| B. | 10000 rad/sec |
| C. | 1000 rad/sec |
| D. | more than 10000 rad/sec |
| Answer» D. more than 10000 rad/sec | |
| 4. |
Wave A = 100 sin t and wave B = 100 cos t. Then |
| A. | rms values of the two waves are equal |
| B. | rms values of A is more than that of B |
| C. | rms values of A is less than that of B |
| D. | rms values of the two waves may or may not be equal |
| Answer» D. rms values of the two waves may or may not be equal | |
| 5. |
and i(t) is a unit step, then V(t) in the steady state is given by |
| A. | 4/9 |
| B. | 4/3 |
| C. | |
| Answer» B. 4/3 | |
| 6. |
For a transmission line open circuit and short circuit impedances are 20 and 5 . Then characteristic impedance is |
| A. | 100 |
| B. | 50 |
| C. | 25 |
| D. | 10 |
| Answer» E. | |
| 7. |
The driving-point impedance Z(s) of a network has a pole-zero locations as shown in the figure. If Z(0) = 3, then Z (s) is |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 8. |
The rms value of wave in figure is |
| A. | about 95 V |
| B. | about 80 V |
| C. | about 50 V |
| D. | about 25 V |
| Answer» C. about 50 V | |
| 9. |
When a current source I is suddenly connected across a two terminal relaxed RC circuit at time t = 0, the voltage across the current source is shown in figure. The RC circuit is |
| A. | a series combination of R and C |
| B. | a parallel combination of R and C |
| C. | a series combination of R and parallel combination of R and C |
| D. | a pure capacitor |
| Answer» D. a pure capacitor | |
| 10. |
The degree of the nodes 1, 2, 3, 4 is |
| A. | 2 |
| B. | 3 |
| C. | 2 for 1, 2, 3, and 3 for 4 |
| D. | all 3 |
| Answer» E. | |
| 11. |
A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using 1.2 wattmeter 2.one wattmeter 3.3 wattmeter Which of the above statements is correct? |
| A. | 1 and 2 |
| B. | 1 and 3 |
| C. | 2 and 3 |
| D. | 3 alone |
| Answer» C. 2 and 3 | |
| 12. |
C = (2) (energy)/V2 |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which of the following pairs are correctly matched? 1.Brune's realisation : realisation with ideal transformer. 2.Cauer realisation : ladder realisation. 3.Bott Duffin realisation : with non ideal transformer. Select the answer using the following codes: |
| A. | 1, 2 and 3 |
| B. | 2 and 3 |
| C. | 1 and 3 |
| D. | 1 and 2 |
| Answer» E. | |
| 14. |
In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0+ is |
| A. | 00 |
| B. | CE |
| C. | CE (1 - |
| D. | -t/RC |
| E. | D. |
| Answer» B. CE | |
| 15. |
Z(c) for the network shown in the figure is The value of C and R are, respectively |
| A. | 1/6 F and 4 |
| B. | 2/9 F and 9/2 |
| C. | 2/3 F and 1/2 |
| D. | 1/2 F and 1 |
| Answer» B. 2/9 F and 9/2 | |
| 16. |
System function , For a signal sin 2t, the steady state response is |
| A. | 1/8 |
| B. | |
| C. | C. |
| Answer» A. 1/8 | |
| 17. |
In the given circuit, viewed from AB, the circuit can be reduced to an equivalent circuit as |
| A. | 5 volts source in series with 10 resistor |
| B. | 7 volts source in series with 2.4 resistor |
| C. | 15 volts source in series with 2.4 resistor |
| D. | 1 volt source in series with 10 resistor |
| Answer» C. 15 volts source in series with 2.4 resistor | |
| 18. |
A network has two branches in parallel. One branch contains impedance Z1 and the other branch has impedance Z2. If it is fed from an ac voltage V of frequency f, the current through Z1 depends, on |
| A. | V, Z1, Z2 |
| B. | V, Z1 |
| C. | Z1, Z2 |
| D. | V, Z1, f |
| Answer» E. | |
| 19. |
A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be |
| A. | 230 V |
| B. | 0.5 x 230 V |
| C. | 2 x 230V |
| D. | 230/2V |
| Answer» D. 230/2V | |
| 20. |
A two branch parallel circuit has a 20 resistance and 1 H inductance in one branch and a 100 F capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is |
| A. | 500 |
| B. | 50 |
| C. | 20 |
| D. | 5 |
| Answer» B. 50 | |
| 21. |
The impedance of an RC series circuit is 12 at f= 50 Hz. At f= 200 Hz, the impedance will be |
| A. | more than 12 |
| B. | less than 3 |
| C. | more than 3 but less than 12 |
| D. | more than 12 but less than 24 |
| Answer» D. more than 12 but less than 24 | |
| 22. |
In an RC series circuit R = 100 and XC = 10 . In this circuit |
| A. | the current and voltage are in phase |
| B. | the current leads the voltage by about 6 |
| C. | the current leads the voltage by about 84 |
| D. | the current lags the voltage by about 6 |
| Answer» C. the current leads the voltage by about 84 | |
| 23. |
Assertion (A): The number of basic loops is equal to number of links. Reason (R): The graph theory helps in choosing independent variables in circuit analysis. |
| A. | Both A and R are true and R is correct explanation of A |
| B. | Both A and R are true and R is not the correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» C. A is true but R is false | |