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January 2025 term · Electronic Systems Thinking and Circuits · EE1101

Electronic Systems Thinking and Circuits Qualifier: 13 April 2025 (January 2025 term)

The IIT Madras BS Electronic Systems Thinking and Circuits (ESTC) Qualifier paper sat on 13 Apr 2025, in the January 2025 term: 25 questions for 40 marks in 120 minutes. Every question is below with its answer. Take it as a timed mock test to be marked, or read it through first.

Questions
25
Marks
40
Duration
120 min
MCQ
10
Numerical
15
Take as mock testPractise with answers

Updated

Official paper: IIT M ES REATTEMPT AN EXAM QEQ1 13 Apr 2025 · No negative marking.

Question 1

+1 markOne correct option

If the magnitude of the voltage across a given capacitor is decreased, the amount of stored charge increases.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • B

    FALSE

Question 1 on its own page

Question 2

+1 markOne correct option
  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • B

    FALSE

Question 2 on its own page

Question 3

+1 markOne correct option

Four equal-value resistors are connected in parallel across a voltage source of 5 V. A current of 2.5 mA is measured flowing out of the source. Then the value of each resistor is 8 kΩ.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • A

    TRUE

Question 3 on its own page

Question 4

+1 markOne correct option

The time period of a wave is generally measured as the time interval between two consecutive similar (positive and positive or negative and negative) peaks.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • A

    TRUE

Question 4 on its own page

Question 5

+1 markOne correct option

A high-frequency signal completes more cycles in one second than a low-frequency signal.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • A

    TRUE

Question 5 on its own page

Question 6

+1 markOne correct option
  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • B

    FALSE

Question 6 on its own page

Question 7

+1 markOne correct option

Ampere - hour is an equivalent unit of charge.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • A

    TRUE

Question 7 on its own pageAlso asked in Quiz 1 7 Jul 2024, Quiz 1 7 Jul 2024, Quiz 1 7 Jul 2024

Question 8

+1 markOne correct option

If the third harmonic frequency is 150 Hz, the fundamental frequency is 50 Hz.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • A

    TRUE

Question 8 on its own page

Question 9

+1 markOne correct option

A 100 Ω resistor is connected in series with a parallel combination of four 1 kΩ resistors. A 100 V source voltage is applied across this circuit. Then the magnitude of the current flowing through the 100 Ω resistor is smaller than that of the current flowing through each 1 kΩ resistor.

  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • B

    FALSE

Question 9 on its own page

Question 10

+1 markOne correct option
  1. A

    TRUE

  2. B

    FALSE

Show answer

Correct answer

  • B

    FALSE

Question 10 on its own page

Question 11

+2 marksNumerical answer
Show answer

Correct answer: 1

Question 11 on its own page

Question 12

+2 marksNumerical answer
Show answer

Correct answer: 30

Question 12 on its own page

Question 13

+2 marksNumerical answer
Show answer

Correct answer: 16.2 (accepted within ±0.2)

Question 13 on its own page

Question 14

+2 marksNumerical answer

The energy consumed by a 100 W electric bulb in two hours is ___________ kJ.

Show answer

Correct answer: 720

Question 14 on its own page

Question 15

+2 marksNumerical answer

The energy stored on a 3 μF capacitor connected across a 20 V source is ______________ μJ

Show answer

Correct answer: 600

Question 15 on its own page

Question 16

+2 marksNumerical answer

For the circuit shown below and answer the given subquestions.

The mesh current I1 in the direction shown is _________ A

Show answer

Correct answer: 7.13 (accepted within ±0.72)

Question 16 on its own page

Question 17

+2 marksNumerical answer

For the circuit shown below and answer the given subquestions.

The mesh current I2 in the direction shown is _________ A

Show answer

Correct answer: 2.35 (accepted within ±0.24)

Question 17 on its own page

Question 18

+2 marksNumerical answer

For the circuit shown below and answer the given subquestions.

The mesh current I3 in the direction shown is _________ A

Show answer

Correct answer: -0.06 (accepted within ±0.006)

Question 18 on its own page

Question 19

+2 marksNumerical answer

For the circuit shown below and answer the given subquestions.

The power dissipated in the 2 Ω resistor is __________ W

Show answer

Correct answer: 11.035 (accepted within ±1.105)

Question 19 on its own page

Question 20

+2 marksNumerical answer

For the circuit shown below and answer the given subquestions.

The power dissipated in the 4 Ω resistor is__________ W

Show answer

Correct answer: 23.225 (accepted within ±2.325)

Question 20 on its own page

Question 21

+2 marksNumerical answer

Refer the below circuits and answer the given subquestions.

With reference to the Circuit A shown,the equivalent capacitance of the circuit across nodes A and B is ________ μF

Show answer

Correct answer: 20 (accepted within ±2)

Question 21 on its own page

Question 22

+2 marksNumerical answer

Refer the below circuits and answer the given subquestions.

With reference to the Circuit B shown,the voltage across the 40 μF capacitor, v1 with the polarity as shown is ________ V

Show answer

Correct answer: 30 (accepted within ±3)

Question 22 on its own page

Question 23

+2 marksNumerical answer

Refer the below circuits and answer the given subquestions.

With reference to the Circuit B shown,the voltage across the 60 μF capacitor, v2 with the polarity as shown is __________ V.

Show answer

Correct answer: 10 (accepted within ±1)

Question 23 on its own page

Question 24

+2 marksNumerical answer

Refer the below circuits and answer the given subquestions.

With reference to the Circuit B shown,the voltage across the 20 μF capacitor, v3 with the polarity as shown is____________ V.

Show answer

Correct answer: 30 (accepted within ±3)

Question 24 on its own page

Question 25

+2 marksNumerical answer

Refer the below circuits and answer the given subquestions.

With reference to the Circuit B shown,the charge stored on 30 μF capacitor is _________ μC.

Show answer

Correct answer: 600

Question 25 on its own page