## NPTEL Basic Electrical Circuits Week 5 Assignment Answers 2024

1. For the circuit given below, find the value of β for which voltage at node V_{y} will be zero –

- -3.25
- 3.25
- -1.75
- 1.75

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2. In the circuit shown below, find the power absorbed by the 10V battery –

- -48.66 W
- -46 W
- 46 W
- 48.66 W

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3. In the circuit given below, find the value of (V_{1}+V_{2}+V_{3}+V_{4} ) –

- -18
- -16
- 0
- 16

Answer :-

4. In the below circuit ,what are the values of i_{1}+i_{2}+i_{3}+i_{4}+i_{5}

R1 = R2 =14Ω

R3 = R4 = R5 = 6Ω

R6 =2Ω

R7 = 1.5Ω

- 13 A, -3 A, – 1.5 A, 10 A, 7.5 A
- 11 A, 4 A, 2 A, -6.5 A, 8 A
- 13 A, 5 A, -1.5 A, 10 A, 2.5 A
- 13 A, -3 A, 3.5 A, 10 A, 7.5 A

Answer :-

Use the below diagram to answer the questions 5 and 6

Below setup is used to determine the unknown resistance X. If the Rheostat is set to 30kΩ, current through the galvanometer is 12.448µ𝐴 upwards. If the Rheostat is set to 20kΩ, current through the galvanometer is 16.305µ𝐴 downwards. The resistance of galvanometer is 10kΩ.

5. Find the resistance of rheostat where the galvanometer needle shows no deflection

- 5k Ω
- 25k Ω
- 100k Ω
- 10k Ω

Answer :-

6. What is the value of the resistance X?

- 25k Ω
- 10k Ω
- 5k Ω
- 30k Ω

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7. Use mesh analysis to solve the below circuit. Find the value of 𝐼𝑥 and whathappens to 𝐼𝑥 if we increase the 6kΩ resistance to 8kΩ .

- 𝐼
_{𝑥}= 0.658m A, 𝐼_{𝑥}decreases - 𝐼
_{𝑥}= 0.658m A, No change in 𝐼_{𝑥} - 𝐼
_{𝑥}= 1.764m A,No change in 𝐼_{𝑥} - 𝐼
_{𝑥 }= 1.764m A, 𝐼_{𝑥}decreases

Answer :-

8. Employ mesh analysis to obtain values for i_{x} and v_{a} in the given circuit

- i
_{x}=1.79 A V_{a}=6.86V - i
_{x}=2 A V_{a}=2.46 V - i
_{x}=2.3 A V_{a}=3.78 V - i
_{x}=5.47 A V_{a}=5.12 V

Answer :-

9. Determine the voltage V_{3} in the below circuit

- -0.8415 V
- -1.234 V
- 2.423 V
- -0.2451 V

Answer :-

Based on the below circuit diagram answer the Questions 10 & 11.

Assume all the Resistors have 1Ω Resistance V_{1} = 19V, V_{2} = 17V and V_{3} = 1V

10. Find the current through the R13 Resistor.

- 3 A
- 2 A
- 5 A
- 7 A

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11. Find the current through the R12 Resistor.

- 5 A
- 11 A
- 16 A
- 14 A

Answer :-

12. In the Given circuits On how many circuits we can’t apply mesh analysis.

- 3
- 4
- 5
- 2

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