Physics Syllabus (JEE Main)

Q. If the RMS speed of a gas is 400 m/s at 300 K, what will be the RMS speed at 600 K?
  • A. 400 m/s
  • B. 800 m/s
  • C. 400√2 m/s
  • D. 800√2 m/s
Q. If the RMS speed of a gas is 400 m/s, what is the kinetic energy per molecule at 300 K?
  • A. 0.5 mJ
  • B. 0.4 mJ
  • C. 0.2 mJ
  • D. 0.1 mJ
Q. If the RMS speed of a gas is 400 m/s, what is the speed of the gas molecules in terms of average speed?
  • A. 400 m/s
  • B. 300 m/s
  • C. 500 m/s
  • D. 600 m/s
Q. If the RMS speed of a gas is 400 m/s, what is the speed of the molecules in terms of average speed?
  • A. 400 m/s
  • B. 300 m/s
  • C. 500 m/s
  • D. 600 m/s
Q. If the RMS speed of a gas is 500 m/s, what is the speed of the gas molecules at 1/2 of the RMS speed?
  • A. 250 m/s
  • B. 500 m/s
  • C. 1000 m/s
  • D. 125 m/s
Q. If the RMS speed of a gas is 500 m/s, what is the speed of the gas molecules in terms of average speed?
  • A. 500 m/s
  • B. 250 m/s
  • C. 400 m/s
  • D. 600 m/s
Q. If the RMS speed of a gas is 500 m/s, what is the speed of the molecules in the gas?
  • A. 500 m/s
  • B. 250 m/s
  • C. 1000 m/s
  • D. It varies
Q. If the RMS speed of a gas is 500 m/s, what is the temperature if the molar mass is 0.028 kg/mol?
  • A. 200 K
  • B. 300 K
  • C. 400 K
  • D. 500 K
Q. If the slit width is equal to the wavelength of light used, what is the expected diffraction pattern?
  • A. No diffraction
  • B. Single maximum
  • C. Wide central maximum
  • D. Narrow central maximum
Q. If the slit width is halved in a single-slit diffraction experiment, what happens to the width of the central maximum?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the slit width is halved in a single-slit diffraction experiment, what happens to the angular width of the central maximum?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the speed of a wave in a medium is 300 m/s and its wavelength is 3 m, what is the frequency of the wave?
  • A. 100 Hz
  • B. 150 Hz
  • C. 200 Hz
  • D. 300 Hz
Q. If the speed of an object in circular motion is doubled, what happens to the centripetal acceleration?
  • A. It remains the same
  • B. It doubles
  • C. It quadruples
  • D. It halves
Q. If the speed of light in vacuum is 3 x 10^8 m/s, what is the speed of light in a medium with a refractive index of 1.5?
  • A. 2 x 10^8 m/s
  • B. 2.5 x 10^8 m/s
  • C. 3 x 10^8 m/s
  • D. 1.5 x 10^8 m/s
Q. If the strain in a material is 0.01 and the Young's modulus is 150 GPa, what is the stress?
  • A. 1.5 MPa
  • B. 15 MPa
  • C. 150 MPa
  • D. 1500 MPa
Q. If the stress applied to a material is doubled, what happens to the strain if the material behaves elastically?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the supply voltage in a Wheatstone bridge is increased, how does it affect the balance condition?
  • A. It does not affect the balance condition
  • B. It makes the bridge unbalanced
  • C. It increases the current in the circuit
  • D. It decreases the resistance
Q. If the surface tension of a liquid is 0.072 N/m, what is the force acting on a wire of length 0.5 m placed on the surface of the liquid?
  • A. 0.036 N
  • B. 0.072 N
  • C. 0.144 N
  • D. 0.5 N
Q. If the temperature difference between two bodies is increased, what happens to the rate of heat transfer?
  • A. Decreases
  • B. Increases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature is recorded as 30°C with an error of 0.5°C, what is the maximum possible temperature?
  • A. 30.5°C
  • B. 29.5°C
  • C. 31°C
  • D. 30°C
Q. If the temperature of a conductor increases, what happens to its resistivity?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the material
Q. If the temperature of a gas is doubled at constant volume, what happens to the pressure?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. If the temperature of a gas is doubled, how does its RMS speed change?
  • A. Increases by a factor of sqrt(2)
  • B. Increases by a factor of 2
  • C. Increases by a factor of 4
  • D. Remains the same
Q. If the temperature of a gas is doubled, what happens to its RMS speed?
  • A. Increases by a factor of sqrt(2)
  • B. Increases by a factor of 2
  • C. Increases by a factor of sqrt(3)
  • D. Remains the same
Q. If the temperature of a gas is halved, what happens to its RMS speed?
  • A. Increases by sqrt(2)
  • B. Decreases by sqrt(2)
  • C. Remains the same
  • D. Decreases by 2
Q. If the temperature of a gas is increased at constant volume, what happens to the pressure?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Becomes zero
Q. If the temperature of a gas is increased from 200 K to 800 K, how does the RMS speed change?
  • A. Increases by 2
  • B. Increases by 4
  • C. Increases by sqrt(4)
  • D. Decreases by sqrt(4)
Q. If the temperature of a gas is increased from 300 K to 600 K, how does the RMS speed change?
  • A. It doubles
  • B. It increases by sqrt(2)
  • C. It increases by sqrt(3)
  • D. It remains the same
Q. If the temperature of a gas is increased while keeping the volume constant, what happens to the pressure?
  • A. Pressure decreases
  • B. Pressure increases
  • C. Pressure remains constant
  • D. Pressure becomes zero
Q. If the temperature of a liquid increases, what happens to its viscosity?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies unpredictably
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