## NPTEL Basic Electrical Circuits Week 2 Assignment Answers 2024

1.

- 2.929 mA
- 10 mA
- 2 mA
- 10.929 mA

Answer :-Click Here

2. In the circuit shown below find the voltage across the capacitor Vcap after t = 3ns. Given that, initial voltage across the capacitor is -5V (according to the polarity shown below) and the value of k = 3

- – 2 V
- 2 V
- 8 V
- -8 V

Answer :-

3. Let’s say you are in your college lab and you are given a voltage controlled voltage source and its internal circuit is shown below. Here you can vary k from -1 to 0.8. Also, you have 3 resistors R = {1Ω, 10Ω, 100Ω} with you. Now choose any one resistor and k value between the given range so that the equivalent resistance between port 1 and 2 becomes maximum. [Note that you can connect one resistor and wire between port 3, 4, 5, 6] The values of R and k respectively are-

- 100Ω, 0.8
- 10Ω, 0
- 100Ω, -1
- 1Ω, -1

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4. Calculate the effective resistance of the below infinite ladder question across terminals A and B

- 3R Ω
- 2.3R Ω
- 7R Ω
- 12R Ω

Answer :-

5. Determine the current I in the below circuit

Consider R1 = 8 kΩ ,R2 = 12kΩ, R3 = 5 kΩ.

- -4.2 mA
- -0.5 mA
- 4.5 mA
- -3.2 mA

Answer :-

6. Find the potential between the two terminals A and B (in volts) when I_{in} = 150sin(5t) mA and C = 2 mF. All the capacitors are uncharged initially

- 75 cos (5t) V
- – 30 cos (5t) V
- 5 [ 1 – cos (5t) ] V
- 5 cos (5t) V

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7.

In the diagram given above length of AB = 4m, BC = 1m, CD = 3m. Also from A to B resistance varying as a function R(r) = R_{o}r, also from C to D resistance varying as a function R(r) = R_{o}r^{2} , where r is the distance from A. also given R_{BC} = 2 Ω. Now find the resistance between A and D.(Given R_{o} = 2).

- 1.8 Ω
- 276 Ω
- 274 Ω
- 2.4 Ω

Answer :-

8.

Answer :-

9.

Let’s say there is an element as shown above where current and voltage follows the relation 𝑉 = 𝑙𝑜𝑔_{1}(P1) . where P1 is some coefficient for the given material same as the R,C and L.

Now let’s say 3 elements with coefficients P1,P2,P3 are connected in series, what is the effective coefficient P of the whole material?

- P
_{1}+P_{2}+P_{3} - P
_{2}P_{3}+ P_{1}P_{3}+ P_{1}P_{2} - P
_{1}P_{2}P_{3} - 1/(P
_{1}+P_{2}+P_{3})

Answer :-

10. From the diagram given below, find the value of Vout.

- -45 V
- -18 V
- -27 V
- -10 V

Answer :-

11. Find the resistance of R1, R2 for the system below to work as ideal VCVS and VCCS.

- R1= 0, R2= 0
- R1=0, R2= ∞
- R1= ∞, R2= 0
- R1= ∞, R2= ∞

Answer :-

12. Find the equivalent resistance between points A and B, if each side of the cube has a resistance R.

- 3R/4
- 7R/5
- 2R/5
- 7R/12

Answer :-Click Here