InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What amount of heat will be generated in the circuit shown in Fig. after the swich `Sw` is shifted from position 2 ? |
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Answer» Correct Answer - `1/2Cepsi_(2)^(2)` |
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| 2. |
Figure shows the connection of two ideal diodes and two capacitors C and 2C. A 120-volt battery is connected to the input terminals with a at positive potential and b at lower potential. Find the putput voltage. |
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Answer» Correct Answer - 40 V |
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| 3. |
Five foils, each of area A, are placed one above the other separateed by dielectrics of thickness d and dielectric coefficient `epsi.` Find the equivalent capacitance between a and b, if plates 1 and 4 are joined, and 3 and 5 are joined. |
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Answer» Correct Answer - `(5C)/3` |
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| 4. |
The gap between the plates of a prallel-plate capacitor is filled up with two dielectric layers 1 and 2 thickness `d_(1)` and `d_(2)` permittivities `epsilon_(1)` and `epsilon_(2)` and resistivities `rho_(1)` and `rho_(2)`. A dc voltage `V` is applied to the capacitor with electric field directed from layer 1 to layer 2 find `sigma` the surface density of extraneous charges at the boundary between the dielectric layers and the condition under with `sigma = 0`. |
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Answer» Correct Answer - `alpha=(epsi_(o)V(p_(2)epsi_(2)-p_(1)epsi_(1)))/(p_(1)d_(1)+p_(2)d_(2));p_(2)epsi2=p_(1)epsi_(1)` |
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| 5. |
Two capacitors of capacitance `C_(1)` and `C_(2)` are connected in parallel and a charge Q is delivered to the combination. The two are then disconnected and reconnected in series. What are the new potential differences and charge on the capacitors? |
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Answer» Correct Answer - `V_(1)=Q//C_(1),V_(2)=Q//C_(2),` charges are `q_(1),q_(2)-q_(2),+q_(2)-q_(2),q_(1),` where `q_(2)=Q//2` and `q_(1)=Q(C_(1)-C_(2))//(C_(1)+C_(2))` |
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| 6. |
Find the capacitance of an infinite circuit formed by the repetitioin of the same link consisting of two indentical capacitors, each with capacitors `C` (fig). |
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Answer» Correct Answer - `(sqrt5-1)C//2` |
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| 7. |
In the network of capacitors shown in figure 6.14 find the equivalent capacitance between a and b. Take C=2 `muF` |
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Answer» Correct Answer - `0.75muF` |
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| 8. |
Find the equiivalent capacitance of the circuit of capacitors between A and B in figure 6.21. |
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Answer» Correct Answer - 2C |
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