Major Competitive Exams

Q. In an experiment, the voltage is measured as 12.0 V with an uncertainty of ±0.3 V. What is the absolute error in the voltage measurement?
  • A. 0.3 V
  • B. 0.25 V
  • C. 0.5 V
  • D. 0.1 V
Q. In an experiment, the voltage is measured as 12.0 V with an uncertainty of ±0.5 V. What is the maximum possible error in the voltage measurement?
  • A. 0.5 V
  • B. 0.25 V
  • C. 1 V
  • D. 0.1 V
Q. In an experiment, the voltage is measured as 12.0 V with an uncertainty of ±0.5 V. What is the absolute error in the voltage measurement?
  • A. 0.5 V
  • B. 0.05 V
  • C. 5 V
  • D. 1 V
Q. In an ideal gas, the average kinetic energy of a molecule is directly proportional to:
  • A. Pressure
  • B. Volume
  • C. Temperature
  • D. Density
Q. In an ideal gas, the average kinetic energy of a molecule is directly proportional to which of the following?
  • A. Pressure
  • B. Volume
  • C. Temperature
  • D. Number of molecules
Q. In an ideal gas, the mean free path is defined as the average distance a molecule travels between collisions. Which factor does NOT affect the mean free path?
  • A. Temperature of the gas.
  • B. Density of the gas.
  • C. Size of the gas molecules.
  • D. Color of the gas molecules.
Q. In an ideal gas, the pressure is directly proportional to which of the following?
  • A. Volume
  • B. Temperature
  • C. Number of moles
  • D. Density
Q. In an ideal gas, the root mean square speed of the gas molecules is given by which of the following formulas?
  • A. v_rms = √(3RT/M)
  • B. v_rms = √(RT/M)
  • C. v_rms = √(2RT/M)
  • D. v_rms = √(R/M)
Q. In an ideal gas, the volume occupied by the gas molecules is:
  • A. Negligible compared to the total volume
  • B. Equal to the total volume
  • C. Greater than the total volume
  • D. None of the above
Q. In an ideal gas, which of the following quantities is constant during an isothermal process?
  • A. Pressure.
  • B. Volume.
  • C. Temperature.
  • D. Number of moles.
Q. In an ideal solution, the enthalpy of mixing is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Varies with concentration
Q. In an irreversible process, the change in entropy of the universe is:
  • A. Zero
  • B. Positive
  • C. Negative
  • D. Undefined
Q. In an isochoric process, the volume of the system:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies with temperature
Q. In an isochoric process, what happens to the internal energy of a gas when heat is added?
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It depends on the gas
Q. In an isochoric process, what happens to the internal energy of an ideal gas when heat is added?
  • A. It decreases.
  • B. It remains constant.
  • C. It increases.
  • D. It depends on the amount of heat added.
Q. In an isothermal process for an ideal gas, which of the following is true?
  • A. The internal energy remains constant.
  • B. The temperature increases.
  • C. The pressure decreases.
  • D. The volume remains constant.
Q. In an isothermal process, how does the internal energy of an ideal gas change?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the amount of gas
Q. In an isothermal process, the change in internal energy is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Depends on the system
Q. In an isothermal process, the change in internal energy of an ideal gas is:
  • A. Positive
  • B. Negative
  • C. Zero
  • D. Depends on the amount of gas
Q. In an isothermal process, the internal energy of an ideal gas:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the amount of gas
Q. In an isothermal process, the temperature of the system remains constant. What is the work done by the gas during expansion?
  • A. Zero
  • B. nRT ln(Vf/Vi)
  • C. nRT (Vf - Vi)
  • D. nR (Tf - Ti)
Q. In an isothermal process, the temperature of the system remains constant. What is the work done by the gas?
  • A. Zero
  • B. nRT ln(Vf/Vi)
  • C. nRT
  • D. nR(Tf - Ti)
Q. In an isothermal process, the temperature of the system:
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Varies linearly
Q. In an isothermal process, which of the following remains constant?
  • A. Pressure
  • B. Volume
  • C. Temperature
  • D. Number of moles
Q. In an RL circuit, what is the time constant τ defined as?
  • A. L/R
  • B. R/L
  • C. LR
  • D. 1/(LR)
Q. In an RLC circuit, what is the condition for resonance?
  • A. XL = XC
  • B. R = 0
  • C. L = C
  • D. f = 0
Q. In an RLC series circuit, if the resistance is increased while keeping the inductance and capacitance constant, what happens to the quality factor (Q)?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. In an RLC series circuit, what is the condition for resonance?
  • A. XL = XC
  • B. R = 0
  • C. XL > XC
  • D. R > XL
Q. In beta decay, which particle is emitted from the nucleus?
  • A. Alpha particle
  • B. Beta particle
  • C. Gamma ray
  • D. Neutron
Q. In Biot-Savart Law, what does the term 'dL' represent?
  • A. Element of current
  • B. Element of length
  • C. Element of magnetic field
  • D. Element of charge
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