Physics (School & Undergraduate)

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Q. In an AC circuit, what is the relationship between voltage and current in a purely resistive load?
  • A. Voltage leads current by 90 degrees
  • B. Current leads voltage by 90 degrees
  • C. Voltage and current are in phase
  • D. Voltage and current are out of phase
Q. In an AC circuit, what is the term for the maximum voltage?
  • A. RMS voltage
  • B. Peak voltage
  • C. Average voltage
  • D. Impedance
Q. In an ideal gas, if the temperature is doubled while keeping the volume constant, what happens to the pressure?
  • A. It halves
  • B. It doubles
  • C. It quadruples
  • D. It remains the same
Q. In an ideal gas, what happens to the pressure if the volume is halved while keeping the temperature constant?
  • A. Pressure doubles
  • B. Pressure halves
  • C. Pressure remains the same
  • D. Pressure quadruples
Q. In an ideal gas, what is the relationship between pressure and temperature at constant volume?
  • A. Directly proportional
  • B. Inversely proportional
  • C. No relationship
  • D. Exponential relationship
Q. In an ideal gas, what is the relationship between the average kinetic energy and the absolute temperature?
  • A. Directly proportional
  • B. Inversely proportional
  • C. No relationship
  • D. Exponential relationship
Q. In an isothermal process, what remains constant?
  • A. Pressure
  • B. Volume
  • C. Temperature
  • D. Internal energy
Q. In an RC circuit, if the capacitor is fully charged, what is the current through the circuit?
  • A. Maximum current
  • B. Zero current
  • C. Current equals voltage
  • D. Current equals resistance
Q. In an RC circuit, what happens to the current as time approaches infinity after the switch is closed?
  • A. It approaches zero.
  • B. It approaches the maximum value V/R.
  • C. It oscillates indefinitely.
  • D. It becomes negative.
Q. In an RC circuit, what happens to the voltage across the capacitor as time approaches infinity after a switch is closed?
  • A. It remains zero.
  • B. It equals the supply voltage.
  • C. It oscillates.
  • D. It becomes negative.
Q. In an RC circuit, what is the relationship between the time constant (τ) and the cutoff frequency (f_c)?
  • A. f_c = 1 / (2πτ)
  • B. f_c = 2πτ
  • C. f_c = τ
  • D. f_c = 1 / τ
Q. In an RC circuit, what is the time constant (τ) defined as?
  • A. τ = R*C
  • B. τ = R+C
  • C. τ = R/C
  • D. τ = C/R
Q. In an RC circuit, what is the time constant if R = 2 kΩ and C = 10 µF?
  • A. 20 ms
  • B. 2 ms
  • C. 200 ms
  • D. 0.2 s
Q. In an RC circuit, what is the time constant if R = 4 kΩ and C = 10 µF?
  • A. 40 ms
  • B. 20 ms
  • C. 30 ms
  • D. 50 ms
Q. In electromagnetic induction, what does the term 'flux linkage' refer to?
  • A. The product of magnetic field and area
  • B. The total magnetic flux through a coil
  • C. The induced emf in a circuit
  • D. The resistance of the coil
Q. In nuclear fission, what is typically released along with energy?
  • A. Neutrons
  • B. Protons
  • C. Electrons
  • D. Photons
Q. In quantum mechanics, what does the Heisenberg Uncertainty Principle state?
  • A. You cannot know both the position and momentum of a particle with absolute certainty.
  • B. Energy and mass are interchangeable.
  • C. Particles can exist in multiple states simultaneously.
  • D. Light behaves only as a wave.
Q. In quantum mechanics, what does the wave function represent?
  • A. The exact position of a particle
  • B. The probability distribution of a particle's position
  • C. The energy of a particle
  • D. The speed of a particle
Q. In rotational dynamics, what does the moment of inertia depend on?
  • A. Mass and shape of the object
  • B. Only the mass of the object
  • C. Only the shape of the object
  • D. Mass and velocity of the object
Q. In rotational dynamics, what is the moment of inertia of a point mass m at a distance r from the axis of rotation?
  • A. m * r^2
  • B. m / r^2
  • C. m + r^2
  • D. m - r^2
Q. In rotational dynamics, what is the moment of inertia?
  • A. The rotational analog of mass.
  • B. The torque applied to an object.
  • C. The angular velocity of an object.
  • D. The linear momentum of an object.
Q. In semiconductors, what is the effect of doping?
  • A. It increases the conductivity by adding impurities.
  • B. It decreases the conductivity by removing electrons.
  • C. It creates a vacuum in the material.
  • D. It makes the material completely non-conductive.
Q. In simple harmonic motion, what is the maximum displacement from the equilibrium position called?
  • A. Amplitude
  • B. Frequency
  • C. Period
  • D. Wavelength
Q. In simple harmonic motion, what is the relationship between the displacement and the restoring force?
  • A. Directly proportional
  • B. Inversely proportional
  • C. Independent
  • D. Constant
Q. In simple harmonic motion, what type of energy is at its maximum when the displacement is at its maximum?
  • A. Kinetic energy
  • B. Potential energy
  • C. Total energy
  • D. Mechanical energy
Q. In terms of stability, what is the effect of lowering the center of mass of a rolling object?
  • A. Increases stability
  • B. Decreases stability
  • C. No effect on stability
  • D. Depends on the object's shape
Q. In the Doppler effect, what happens to the frequency of a sound wave as the source moves towards the observer?
  • A. It decreases
  • B. It remains the same
  • C. It increases
  • D. It becomes zero
Q. In the kinetic theory of gases, which of the following assumptions is NOT true?
  • A. Gas molecules are in constant random motion
  • B. Gas molecules occupy a negligible volume
  • C. Gas molecules experience no intermolecular forces
  • D. Gas molecules have significant mass
Q. In the kinetic theory, what is assumed about the collisions between gas molecules?
  • A. They are perfectly elastic
  • B. They are perfectly inelastic
  • C. They lose energy
  • D. They are not considered
Q. In the photoelectric effect, what happens when light of sufficient frequency hits a metal surface?
  • A. Electrons are emitted from the surface
  • B. Photons are absorbed by the metal
  • C. The metal becomes ionized
  • D. Heat is generated in the metal
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