Physics Syllabus (JEE Main)

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Q. At what temperature will the RMS speed of a gas be 1000 m/s if its molar mass is 0.044 kg/mol? (R = 8.314 J/(mol K))
  • A. 500 K
  • B. 600 K
  • C. 700 K
  • D. 800 K
Q. At what temperature will the RMS speed of a gas be 300 m/s if its molar mass is 28 g/mol?
  • A. 300 K
  • B. 600 K
  • C. 900 K
  • D. 1200 K
Q. At what temperature will the RMS speed of a gas be 500 m/s if its molar mass is 0.02 kg/mol? (2000)
  • A. 250 K
  • B. 500 K
  • C. 1000 K
  • D. 2000 K
Q. At what temperature will the RMS speed of a gas be 600 m/s if its molar mass is 0.02 kg/mol?
  • A. 300 K
  • B. 600 K
  • C. 900 K
  • D. 1200 K
Q. Calculate the moment of inertia of a hollow sphere of mass M and radius R about an axis through its center.
  • A. 2/5 MR^2
  • B. 3/5 MR^2
  • C. 2/3 MR^2
  • D. MR^2
Q. Calculate the RMS speed of a gas with molar mass 0.028 kg/mol at 300 K. (R = 8.314 J/(mol K))
  • A. 500 m/s
  • B. 600 m/s
  • C. 700 m/s
  • D. 800 m/s
Q. Convert 5 kilometers to meters.
  • A. 500
  • B. 5000
  • C. 50
  • D. 5
Q. Determine the moment of inertia of a solid sphere of mass M and radius R about an axis through its center.
  • A. 2/5 MR^2
  • B. 3/5 MR^2
  • C. 4/5 MR^2
  • D. MR^2
Q. During a phase change, the temperature of a substance:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies unpredictably
Q. During an isochoric process, the volume of the gas:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies with temperature
Q. During an isochoric process, the volume of the system:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies with temperature
Q. During an isothermal expansion of an ideal gas, what happens to the internal energy?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the amount of gas
Q. For a charged plane sheet, if the surface charge density is doubled, what happens to the electric field?
  • A. It remains the same
  • B. It doubles
  • C. It halves
  • D. It quadruples
Q. For a charged sphere, what happens to the electric field inside the sphere as the radius increases?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. For a charged spherical conductor, what happens to the electric field inside the conductor when it is charged?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. For a circular loop of radius R carrying a current I, what is the magnetic field at the center of the loop?
  • A. B = μ₀I/(2R)
  • B. B = μ₀I/(4R)
  • C. B = μ₀I/(πR)
  • D. B = μ₀I/(2πR)
Q. For a closed loop of wire carrying current, what does the line integral of the magnetic field equal?
  • A. Zero
  • B. The product of current and resistance
  • C. μ₀ times the total current enclosed
  • D. The electric field times the area
Q. For a closed surface enclosing multiple charges, how is the total electric flux calculated?
  • A. Sum of individual fluxes
  • B. Product of charges
  • C. Sum of enclosed charges divided by ε₀
  • D. Average of charges
Q. For a closed surface enclosing multiple charges, how is the total electric flux related to the enclosed charges?
  • A. It is proportional to the sum of the charges
  • B. It is inversely proportional to the sum of the charges
  • C. It is independent of the charges
  • D. It is proportional to the square of the charges
Q. For a composite body made of a solid cylinder and a solid sphere, how do you calculate the total moment of inertia about the same axis?
  • A. Add the individual moments
  • B. Multiply the individual moments
  • C. Subtract the individual moments
  • D. Divide the individual moments
Q. For a composite body made of two solid cylinders of mass M1 and M2 and radius R, what is the total moment of inertia about the same axis?
  • A. I1 + I2
  • B. I1 - I2
  • C. I1 * I2
  • D. I1 / I2
Q. For a current-carrying loop, what is the magnetic field at the center if the radius is halved?
  • A. It remains the same
  • B. It doubles
  • C. It quadruples
  • D. It halves
Q. For a cylindrical conductor of radius R carrying current I, what is the magnetic field at a point outside the conductor?
  • A. 0
  • B. μ₀I/2πR
  • C. μ₀I/4πR
  • D. μ₀I/πR
Q. For a cylindrical conductor of radius R carrying current I, what is the magnetic field at a point outside the cylinder?
  • A. 0
  • B. μ₀I/2πr
  • C. μ₀I/4πr
  • D. μ₀I/πr
Q. For a damped oscillator, what is the relationship between the natural frequency and the damped frequency?
  • A. Damped frequency is greater
  • B. Damped frequency is equal
  • C. Damped frequency is less
  • D. No relationship
Q. For a diffraction grating with 500 lines per mm, what is the angle of the first order maximum for light of wavelength 600 nm?
  • A. 30 degrees
  • B. 45 degrees
  • C. 60 degrees
  • D. 15 degrees
Q. For a diffraction pattern produced by a single slit, how does the width of the central maximum compare to the other maxima?
  • A. Wider than all other maxima
  • B. Narrower than all other maxima
  • C. Equal to all other maxima
  • D. None of the above
Q. For a diffraction pattern produced by a single slit, how does the width of the central maximum change if the slit width is halved?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. For a gas at 300 K, if the RMS speed is 500 m/s, what will be the RMS speed at 600 K?
  • A. 500 m/s
  • B. 707 m/s
  • C. 1000 m/s
  • D. 250 m/s
Q. For a gas at 300 K, what is the RMS speed if the molar mass is 0.028 kg/mol?
  • A. 500 m/s
  • B. 600 m/s
  • C. 700 m/s
  • D. 800 m/s
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