QCAA Physics Practice Test

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• States that the black-body radiation curve for different temperatures peaks at a wavelength inversely proportional to the temperature.
• Which statement correctly describes Lenz's law?
• Which subatomic particle is produced in the atmosphere by collisions of cosmic ray protons with nitrogen and oxygen atoms?
• Which law relates the square of the sidereal period of a planet to the cube of its mean distance from the Sun?
• Rotational speed is defined as what?
• What concept indicates the direction a lone north magnetic pole would move in a magnetic field?
• What is magnetic flux a measure of?
• The negative potential on the collector at which the photoelectric current becomes zero is called what?
• The process by which greenhouse gases warm Earth by absorbing the long-wavelength radiation from Earth's surface.
• Which force acts perpendicular to a contact surface, preventing penetration?
• What is the resistance to motion of surfaces in contact with each other?
• Which word describes energy that exists in separate, distinct units?
• The orbital shape and orientation of an electron in a given state are determined primarily by which quantum numbers?
• What is the force acting on an object travelling in a circle that pulls toward the centre called?
• Which term describes waves that propagate without a medium, such as light?
• What device transfers alternating current between circuits, usually increasing or decreasing voltage?
• Which electrode is the negative electrode from which electrons are emitted?
• Time dilation refers to which phenomenon?
• In a vacuum tube, which terminal is the positive terminal that attracts electrons?
• A situation described as a self-contradictory conclusion from true premises is called what?
• What is the mass of an object when measured in the same reference frame as the observer?
• Which term describes a region of space near a charged particle or object within which a force would be exerted on other charged particles or objects?
• Relates change in mass to change in energy, ΔE = Δm c^2.
• What symbol is used for wavelength?
• Proper length is:
• Which term describes a region near a charged particle where a force would be exerted on other charged particles?
• Which statement best describes the direction of a gravitational field?
• Which term is defined as the force of gravity acting on an object?
• Which law relates the electrostatic force to the product of charges and inverse-square distance?
• According to Wien's displacement law, as temperature increases, the peak wavelength ...?
• For an electron with l = 1 and s = 1/2, the allowed total angular momentum quantum numbers j are:
• A fundamental constant used in quantum mechanics that relates frequency to energy (symbol h; SI unit: joule second), equal to 6.626 × 10-34 J s. Also known as the Planck constant.
• Which term describes a field that has constant strength, as found between charged parallel plates?
• A quantum of all forms of electromagnetic radiation is called what?
• Which term describes magnetism that is always present in a material without external power?
• Which quantity is a measure of the gravitational force on an object, expressed in newtons?
• Rotational speed is measured in which unit?
• Which term best describes a material that exhibits strong, permanent magnetism due to aligned atomic moments?
• Which term describes the radius from the center of a black hole to the boundary beyond which nothing can escape?
• Which quantity is the measure of the amount of matter in an object?
• In Rutherford's model, what is the charge of the nucleus?
• Which term best describes the momentum of a fast-moving object as observed from a frame moving relative to the object?
• In special relativity, the speed of light in vacuum is:
• According to the Bohr model, when an electron moves between stationary states, it is accompanied by the emission or absorption of a photon.
• Which phenomenon involves the emission of electrons when light shines on a material?
• Which describes a region of space in which a magnetic force can be detected?
• Which statement defines a gravitational field?
• In a gravitational field, g is the net force per unit mass at a point. Which quantity does g represent?
• Which law states that all planets move in elliptical orbits with the Sun at one focus?
• Which term describes the force applied to an object by a person or another object?
• The principal quantum number n describes which property of an electron in an atom?
• Which model uses wave characteristics such as wavelength, frequency and speed to describe the behaviour of light, including polarization and diffraction?
• What is the name of the motion where an object travels at a constant speed in a circle?
• Which law is expressed as T^2 ∝ r^3?
• Which force acts along an imaginary line drawn perpendicular to a surface?
• Which model posits electrons move in stationary states with fixed angular momentum and energy, with radius related to energy?
• What term describes waves produced by an oscillating electric charge that radiate at the speed of light, with electric and magnetic fields perpendicular to each other?
• What is the time taken by a planet to complete one orbit relative to the distant stars called?
• Which term describes light with a fixed phase relationship and is typically produced by laser sources?
• The electron spin quantum number s has possible values and determines the spin projection m_s. Which of the following is a correct pair?
• The motion of an object with regard to some other moving object; the motion is not calculated with reference to Earth, but is the velocity of the object in reference to the other moving object as if it were in a static state
• What is generated when a magnet moves through a coil?
• What symbol denotes proper length?
• Which statement is true about inertial frames of reference?
• What is the SI unit of the work function?
• What is the value of Planck's constant?
• What is Coulomb's law constant value?
• What is Coulomb's law constant k value?
• An object that absorbs all radiation falling on it, at all wavelengths; it is a perfect absorber or emitter of radiation.
• The magnitude of the orbital angular momentum L for a state with orbital quantum number l is given by which expression?
• What is the approximate value of 1 eV in joules?
• Which law describes the force between electric charges that is proportional to the product of the charges and inversely proportional to the square of the distance between them?
• An almost massless and neutral elementary particle produced in radioactive decay of pions.
• An arbitrary set of axes with reference to which the position or motion of something is described or physical laws are formulated
• Which law describes the attractive force between any two masses?
• Gravity is the force of attraction between objects that is due to their masses.
• What is the term for the production of an EMF within the same circuit due to a changing current in that circuit?
• Which principle states that energy can neither be created nor destroyed, but only changed from one form to another or transferred from one object to another?
• Which subatomic particle is produced in the decay of pions and has a negative electric charge and greater mass than the electron?
• What is the SI unit of centripetal acceleration?
• The magnitude of the orbital angular momentum is determined by which quantum number?
• Which unit of energy is defined as the work done on an electron when it is accelerated by a potential difference of 1 volt?
• Which instrument is used to measure magnetic field strength?
• What is a relativistic time interval?
• In a hydrogen atom, energy levels depend only on which quantum number?
• Which term is used for a single quantum of electromagnetic radiation?
• For a single-electron atom, the possible total angular momentum j values for given l and s = 1/2 are which set?
• What simple machine is a flat surface raised at one end to aid in lifting a load?
• What is the pulling force transmitted along a rope or string?
• Which statement correctly defines average speed?
• The acceleration experienced by any object moving in a circular path directed toward the centre of motion is known as what?
• What is the distance between corresponding points on successive waves called? (symbol λ, SI unit metre)
• In relativity, what symbol is commonly used for time?
• Simultaneity in the context of relativity is:
• What term describes the induction of EMF in one circuit caused by a changing current in a nearby circuit due to magnetic coupling?
• Which rule relates the directions of induced current, magnetic field, and velocity when a conductor cuts across magnetic field lines and an emf is induced?
• Which statement expresses the relativity of simultaneity?
• What term describes the motion of an object with respect to another moving object?
• Which statement about time dilation is true?
• What term describes a magnet whose magnetic field is produced by passing current through a coil?
• In an isolated collision, the total momentum before equals after.
• What is the term for the minimum frequency of a photon that can eject an electron from a surface?
• Which term describes the region of space where a magnetic force can be detected?
• Which statement about photon energy is true according to E = hf?
• What device is a long straight coil of wire used to generate a controlled and almost uniform magnetic field?
• In which type of wave is the displacement of the medium perpendicular to the direction of energy transfer?
• A phenomenon associated with magnetic fields, arising from the motion of electric charges.
• Which experiment demonstrates the wave nature of light by producing an interference pattern with two coherent sources?
• A non-accelerating frame of reference in which Newton's laws hold
• What is the proper time interval?
• The magnetic quantum number m_l ranges from which values for a given orbital angular momentum l?
• What is the momentum of an object as measured by an observer moving relative to the object?
• Which statements constitute the postulates of special relativity?
• Which term describes light that has a fixed phase relationship across its waves?
• Which term describes an energy form that exists in distinct units called quanta?
• What is the SI unit of wavelength?
• What is the production of an EMF in a circuit due to a changing current in an adjacent circuit that is linked to the first by flux lines of a magnetic field called?
• Which model introduced stationary states with fixed angular momentum and energy for electrons?
• What is the symbol for the minimum energy required to remove an electron from a solid?
• What is induced when a magnet moves in relation to a circuit, producing a potential difference?
• Which statement best describes an inertial frame?
• Which law states that all masses attract all other masses?
• In devices dealing with electron flow, which electrode is the source of emitted electrons?
• Which law states that for every action there is an equal and opposite reaction?
• Which quantity is the amount of matter in an object, independent of gravity?
• Which quantity represents the amount of matter in an object, often described as its inertia?
• An elementary particle similar to the electron but with greater mass, produced in the decay of pions.
• Which symbol denotes proper time?
• What quantity measures how many waves pass a given point each second? (symbol f, SI unit Hz)
• Length contraction occurs when an object is measured by an observer in motion along its length; what is observed about the length?
• In the right-hand rule for a straight current, which direction do your curled fingers indicate?
• The radiation emitted by a black body from the conversion of thermal energy, and which has a characteristic frequency distribution that depends on the temperature.
• In a photoelectric experiment, stopping potential measures what property of emitted electrons?
• What is the time taken for a planet to appear in front of the same constellation of stars as seen from Earth called?
• For a given principal quantum number n, the allowed values of l are which set?
• What is a region of space in which nothing can escape due to extremely strong gravity?
• What term describes the length measured by an observer moving relative to the object in the direction of motion?
• Which principle states that an object at rest stays at rest and an object in motion stays in motion unless acted upon by an unbalanced force?
• What is the distance light travels in one year?
• What is the linear velocity of an object undergoing circular motion whose direction is tangent to the path called?
• Motion of an object not undergoing acceleration.
• Mean lifetime refers to:
• Which law states that the direction of the induced current is such that it opposes the change in the circuit or the magnetic field that produces it?
• Which arrangement demonstrates the wave nature of light by producing an interference pattern from two coherent beams?
• Which term describes the radius from the center of a black hole to the boundary beyond which nothing can escape?
• In circular motion, the angular momentum of a particle of mass m moving with speed v at radius r has magnitude equal to which expression?
• Which term describes the push or pull that can change an object's speed or direction?
• What is the SI unit of centripetal force?
• Which theory describes space and time linked for objects moving at constant speed and is built on two postulates?
• Which expression represents the work function in the photoelectric context?
• Which equation expresses Newton's Second Law?
• Which model describes a small central positively charged nucleus with electrons orbiting around it?
• Which statement is true about centripetal force in circular motion?
• The difference in electric potential between two points, expressed in volts, is called what?
• What is the correct pair for the period's symbol and SI unit?
• Which term describes a quantity that relates mass and energy and is expressed with c^2 in the equation ΔE = Δm c^2?
• Which law states that a radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time?
• What symbol denotes relativistic length?
• Kepler's second law is also known as what name?
• Which term is used for the average time before decay of a particle as seen by an observer at rest with respect to the particle?
• Which law states that a changing magnetic flux through a circuit induces an EMF proportional to the rate of change of the flux linkage?
• According to Ampère's right-hand rule, the thumb points in the direction of the current. What do the curled fingers indicate?
• In the hydrogen atom, the energy of a level depends primarily on which quantum number?
• The magnetic quantum number m_l describes which aspect of angular momentum?
• What is the term for a wave produced by an oscillating electric charge that radiates at the speed of light with mutually perpendicular electric and magnetic fields?
• The smallest discrete packets of energy of electromagnetic waves, also later known as photons.
• In relativity, an event is best described as:
• Which rule determines the direction of the force on a current-carrying wire in a magnetic field?
• What is the unit of potential difference?
• Which concept states that every particle or quantum entity may be described as both a particle and a wave?
• Which values can the principal quantum number n take for an electron in an atom?
• The intrinsic spin angular momentum of a photon has magnitude equal to which value in units of ħ?
• A theory that all motion must be defined relative to a frame of reference; it consists of two principal postulates. It explains how space and time are linked for objects moving at constant speed in a straight line, and forms part of the basis of modern physics
• What term describes the set of axes used to describe the motion of an object?
• A self-contradictory conclusion from true premises.
• Which term is defined as the intensity of the electric field at a location, with symbol E and units of newtons per coulomb (N/C)?
• Which quantity describes the intensity of gravity at a point in a gravitational field, often denoted by g?
• What is the SI unit of magnetic field strength?
• What is the SI unit of frequency?
• Which equation relates energy to frequency in quantum theory?