Physics 9702 A2 Level Definitions
acoustic impedance - correct answer-product of density of medium and speed of sound in
medium
Activity - correct answer-The number of atoms of a radioactive substance that decay per unit
time.
amplitude modulation - correct answer-amplitude of carrier wave varies in synchrony with the
displacement of the information signal
Analogue signal - correct answer-data varies continuously with time and can have any value
between two limits
Angular Velocity - correct answer-the rate of change of angular displacement with respect to
time swept out by the radius
Attenuation - correct answer-gradual reduction or loss in signal power or energy
Avogadro constant - correct answer-number of atoms of carbon-12 in 0.012 kg of carbon-12
Bandwidth - correct answer-the range of frequencies that can be amplified by the same
amount of an operational amplifier
Binding Energy - correct answer-The amount of energy needed to split a nucleus completely
into its individual nucleons.
capacitance - correct answer-ratio of charge on body and its potential
Coulomb's Law - correct answer-The force between two point charges is directly proportional
to the product of the charges and inversely proportional to the square of the distance
between the charges.
de Broglie wavelength - correct answer-wavelength of wave that is associated with a particle
that is moving
digital signal - correct answer-consists of a series of pulses of highs and lows between two
discrete levels and has no intermediate values
Electric Field Strength - correct answer-force per unit positive charge acting on a small
stationary positive test charge placed at that point
Electric Potential - correct answer-work done per unit charge in bringing a positive test
charge from infinity to the point (without a change in kinetic energy).
acoustic impedance - correct answer-product of density of medium and speed of sound in
medium
Activity - correct answer-The number of atoms of a radioactive substance that decay per unit
time.
amplitude modulation - correct answer-amplitude of carrier wave varies in synchrony with the
displacement of the information signal
Analogue signal - correct answer-data varies continuously with time and can have any value
between two limits
Angular Velocity - correct answer-the rate of change of angular displacement with respect to
time swept out by the radius
Attenuation - correct answer-gradual reduction or loss in signal power or energy
Avogadro constant - correct answer-number of atoms of carbon-12 in 0.012 kg of carbon-12
Bandwidth - correct answer-the range of frequencies that can be amplified by the same
amount of an operational amplifier
Binding Energy - correct answer-The amount of energy needed to split a nucleus completely
into its individual nucleons.
capacitance - correct answer-ratio of charge on body and its potential
Coulomb's Law - correct answer-The force between two point charges is directly proportional
to the product of the charges and inversely proportional to the square of the distance
between the charges.
de Broglie wavelength - correct answer-wavelength of wave that is associated with a particle
that is moving
digital signal - correct answer-consists of a series of pulses of highs and lows between two
discrete levels and has no intermediate values
Electric Field Strength - correct answer-force per unit positive charge acting on a small
stationary positive test charge placed at that point
Electric Potential - correct answer-work done per unit charge in bringing a positive test
charge from infinity to the point (without a change in kinetic energy).
