OCR H556 A-LEVEL PHYSICS
Electric Field - correct answer-A region around a body in which another charged body feels a
force
Electric Field Strength - correct answer-(NC^-1) The force per unit positive charge
Magnetic Flux - correct answer-(Wb) The product of the MFD and the Area
Magnetic Flux Density - correct answer-(T) The force per unit length on a conductor carrying
a unit current at that point
Tesla - correct answer-Measure of MF per area squared
Weber - correct answer-Measure of MF when the magnetic field of MFD is 1m^2
Magnetic Flux Linkage - correct answer-(weber-turns) The product of the Magnetic Flux and
the number of turns.
Capacitance - correct answer-(F) Charge per unit potential difference. Ratio.
Farad - correct answer-Coulomb per volt
Time constant of a capacitor-resistor circuit - correct answer-τ = CR, x=x0e^-t/CR
Time for the charge to have decreased by 1/e
Isotope - correct answer-Elements with the same proton number but different mass numbers
Activity- Radioactivity - correct answer-(Bq) The number of nuclear decays per unit time
Decay constant - correct answer-(s^-1) The probability that an individual nucleus will decay
per unit time
Half Life - correct answer-(t1/2) The time taken for the number of undecayed nuclei to halve
Binding Energy - correct answer-(J) The minimum energy needed to separate all the
nucleons in a nucleus. Equal to the mass defect
Binding Energy per Nucleon - correct answer-The binding energy divided by the total
number of nucleons
Intensity - correct answer-(Wm^-2) Power per unit area
Critical Density - correct answer-The density of the universe for it to reach a final, finite size
Faraday's Law - correct answer-emf ∝ rate of change of magnetic flux
Electric Field - correct answer-A region around a body in which another charged body feels a
force
Electric Field Strength - correct answer-(NC^-1) The force per unit positive charge
Magnetic Flux - correct answer-(Wb) The product of the MFD and the Area
Magnetic Flux Density - correct answer-(T) The force per unit length on a conductor carrying
a unit current at that point
Tesla - correct answer-Measure of MF per area squared
Weber - correct answer-Measure of MF when the magnetic field of MFD is 1m^2
Magnetic Flux Linkage - correct answer-(weber-turns) The product of the Magnetic Flux and
the number of turns.
Capacitance - correct answer-(F) Charge per unit potential difference. Ratio.
Farad - correct answer-Coulomb per volt
Time constant of a capacitor-resistor circuit - correct answer-τ = CR, x=x0e^-t/CR
Time for the charge to have decreased by 1/e
Isotope - correct answer-Elements with the same proton number but different mass numbers
Activity- Radioactivity - correct answer-(Bq) The number of nuclear decays per unit time
Decay constant - correct answer-(s^-1) The probability that an individual nucleus will decay
per unit time
Half Life - correct answer-(t1/2) The time taken for the number of undecayed nuclei to halve
Binding Energy - correct answer-(J) The minimum energy needed to separate all the
nucleons in a nucleus. Equal to the mass defect
Binding Energy per Nucleon - correct answer-The binding energy divided by the total
number of nucleons
Intensity - correct answer-(Wm^-2) Power per unit area
Critical Density - correct answer-The density of the universe for it to reach a final, finite size
Faraday's Law - correct answer-emf ∝ rate of change of magnetic flux
