A Level Physics definitions Quiz 1

What is defined as the temperature scale in kelvins (K), defined in terms of absolute zero, 0 K, and the triple point of water, 273.16 K?

• Absolute scale

• Absolute zero

• Absolute temperature

• Kelvin scale

What is the lowest possible temperature, where the temperature at which an object has minimum internal energy called?

• Absolute zero

• Absolute scale

• Absolute temperature

• Zero Kelvin

What term describes the change of velocity per unit time?

• Acceleration

• Velocity

• Speed

• Motion

What is the number of protons in the nucleus of an atom of an element referred to as?

• Atomic number

• Atomic mass

• Neutron number

• Electron number

What is the number of atoms in 12g of the carbon isotope carbon-12 used to define the mole?

• Avogadro constant

• Atomic mass unit

• Molar mass

• Molecular number

What is the definition of "beta-plus radiation" as described in the glossary?

• Radiation that consists of neutrons emitted by stable nuclei.

• Positrons emitted by unstable proton-rich nuclei.

• Electrons emitted by neutron-rich nuclei.

• Gamma rays emitted during nuclear fusion.

Match the following descriptions with their correct terms:

• Definition of melting point

• The temperature at which a liquid turns into a gas at atmospheric pressure.

• Incorrect definition of freezing point

• The temperature at which a solid turns into a liquid.

• Definition of boiling point

• The maximum temperature a liquid can reach before freezing.

• Definition of condensation point

• The temperature at which a gas turns into a liquid.

What does "Boltzmann constant k" represent?

• The constant ratio of the volume of a gas to its pressure.

• The molar gas constant divided by Avogadro's number.

• The constant ratio of the pressure of a gas to its temperature.

• The constant ratio of the kinetic energy of particles to temperature.

What is the principle of "Charles' law" as defined in the glossary?

• The volume of a gas decreases as its temperature increases at constant pressure.

• The pressure of a gas increases as its volume decreases at constant temperature.

• The volume of a gas increases as its temperature increases at constant pressure.

• The temperature of a gas increases as its pressure increases at constant volume.

What does "capacitance" measure according to the glossary?

• The amount of electrical resistance in a circuit.

• The amount of charge a capacitor can store per unit voltage.

• The amount of energy a capacitor can release.

• The potential difference across a capacitor.