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Indian Navy 10+2 B.Tech Cadet JEE Main 2023 Mixed — practice questions

Explore 5 free JEE Main 2023 Mixed questions in Indian Navy 10+2 B.Tech Cadet Physics. Open each question or exercise to read its content, reference answers and available explanation.

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JEE Main 2023 Mixed questions and exercises with answers

Showing questions 1–5 of 5.

Charge Q is placed at center of a cube. Electric flux through one face:Read the answer and worked solution →In LCR series circuit, at resonance, impedance equals:Read the answer and worked solution →A wire of resistance R is bent into a circle. Resistance between two diametrically opposite points:Read the answer and worked solution →Magnetic flux through a coil changes from 5 mWb to 1 mWb in 0.1 s. Induced EMF:Read the answer and worked solution →Specific heat capacity of monatomic ideal gas at constant V:Read the answer and worked solution →

Worked practice questions

Charge Q is placed at center of a cube. Electric flux through one face:

  1. Q/(6ε₀)
  2. Q/(2ε₀)
  3. Q/(4πε₀)
  4. Q/ε₀
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Correct answer: A. Q/(6ε₀)

Total flux through cube = Q/ε₀ (Gauss law). By symmetry, equally distributed over 6 faces: Q/(6ε₀) per face.

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In LCR series circuit, at resonance, impedance equals:

  1. X_L
  2. X_L + X_C
  3. X_C
  4. R only
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Correct answer: D. R only

**At resonance:** X_L = X_C, so reactive components cancel. Z = sqrt(R² + 0²) = R. Minimum impedance, maximum current, power factor = 1.

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A wire of resistance R is bent into a circle. Resistance between two diametrically opposite points:

  1. 2R
  2. R/4
  3. R
  4. R/2
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Correct answer: B. R/4

Each half-circle has R/2. Two halves in parallel between opposite points: (R/2)(R/2)/(R/2 + R/2) = R/4.

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