AQA A LeveL Physics exAm 2026: comPLete
Questions with AccurAte Answers| GuArAnteed
PAss | LAtest version
1. Absolute Zero - ANSWER Lowest possible temperature, 0K, object has
minimum internal energy.
2. Acceleration - ANSWER Change of velocity per unit time.
3. Activity of a Radioactive Isotope - ANSWER Number of nuclei of the
isotope that disintegrate per second.
4. Becquerel (Bq) - ANSWER Unit of radioactive activity, 1Bq = 1
disintegration per second.
5. Amplitude - ANSWER Maximum displacement from equilibrium of
oscillating object.
6. Angular Displacement - ANSWER Angle an object in circular motion turns
through in radians.
7. 𝜃 = 𝜔t
8. Angular Speed (ω) - ANSWER Rate of change of angular displacement of
object in circular motion.
9. 𝜔 = 2𝜋f
,10.Annihilation - ANSWER When a *particle and its antiparticle meet*, they
destroy each other to *produce 2 photons of equal energy*.
11.Here the minimum energy of each photon produced = hf(min) = rest energy
of the particle.
12.Antiparticle - ANSWER *Equal rest mass* and *equal and opposite charge*
to particle.
13.Young's Fringes - ANSWER Parallel *bright* and *dark* fringes observed
when light from a narrow slit passes through two closely spaced slits.
14.Young Modulus - ANSWER Tensile Stress/ Tensile Strain.
15.Assuming limit of proportionality *hasn't* been reached.
16.Unit: pascal, Pa
17.Accepted Value - ANSWER Value of the most accurate measurement
available, also referred to as the *true value*.
18.Accuracy - ANSWER Closeness of a measurement to the accepted value.
19.Dependent Variable - ANSWER Variable which is *measured*.
20.Independent Variable - ANSWER Variable which is *changed*.
21.Control Variables - ANSWER Variables kept *constant*.
22.Error Bar - ANSWER Representation of uncertainty displayed on a graph.
,23.Random Error - ANSWER Cause readings to be spread about the accepted
value, due to results varying in an *unpredictable* way from one result to
the next.
24.Systematic Error - ANSWER Cause readings to differ from the accepted
value by a *consistent* amount each time the measurement is made.
25.Percentage Uncertainty - ANSWER (Absolute Uncertainty/Mean Value) x
100
26.Precision of a Measurement - ANSWER Precise measurements are very
close to mean value, little variation.
27.Precision *only* depends on random errors and gives *no indication* of
how close the results are to the true/accepted value.
28.Precision of an Instrument - ANSWER Smallest *non-zero* reading that can
be measured by the instrument. Also referred to as sensitivity or resolution.
29.Range - ANSWER Difference between maximum and minimum values
either in a data set or that an instrument can measure.
30.Reliability - ANSWER If a measurement is *consistent* in the reading it
gives every time it is measured under *identical conditions*. Reliability can
be increased if errors are reduced.
31.Repeatable - ANSWER An experiment or measurement that gives the
*same* results when repeated by the *same* person using the *same*
equipment/techniques.
, 32.Reproducible - ANSWER An experiment or measurement that gives the
*same* results when repeated by *another* person or by using *different*
equipment/techniques.
33.Sensitivity of an Instrument - ANSWER Output response per unit input
quantity / how much the output changes when the input is changed by one
unit.
34.Uncertainty of a Measurement - ANSWER Interval within which the true
value of a measurement lies.
35.Valid Measurement - ANSWER Measurements that give the required
information by an acceptable method.
36.Zero Error - ANSWER Error when a measuring system gives a *non-zero*
value when the true value is *zero*. This would result in a systematic error.
37.Mechanical Waves - ANSWER Waves that travel through a substance.
38.Diffraction Grating - ANSWER A plate with may closely spaced parallel
slits ruled on it.
Cathode - ANSWER *Negative* Electrode
Reproducible - ANSWER An experiment or measurement that gives the *same*
results when repeated by *another* person or by using *different*
equipment/techniques.
Questions with AccurAte Answers| GuArAnteed
PAss | LAtest version
1. Absolute Zero - ANSWER Lowest possible temperature, 0K, object has
minimum internal energy.
2. Acceleration - ANSWER Change of velocity per unit time.
3. Activity of a Radioactive Isotope - ANSWER Number of nuclei of the
isotope that disintegrate per second.
4. Becquerel (Bq) - ANSWER Unit of radioactive activity, 1Bq = 1
disintegration per second.
5. Amplitude - ANSWER Maximum displacement from equilibrium of
oscillating object.
6. Angular Displacement - ANSWER Angle an object in circular motion turns
through in radians.
7. 𝜃 = 𝜔t
8. Angular Speed (ω) - ANSWER Rate of change of angular displacement of
object in circular motion.
9. 𝜔 = 2𝜋f
,10.Annihilation - ANSWER When a *particle and its antiparticle meet*, they
destroy each other to *produce 2 photons of equal energy*.
11.Here the minimum energy of each photon produced = hf(min) = rest energy
of the particle.
12.Antiparticle - ANSWER *Equal rest mass* and *equal and opposite charge*
to particle.
13.Young's Fringes - ANSWER Parallel *bright* and *dark* fringes observed
when light from a narrow slit passes through two closely spaced slits.
14.Young Modulus - ANSWER Tensile Stress/ Tensile Strain.
15.Assuming limit of proportionality *hasn't* been reached.
16.Unit: pascal, Pa
17.Accepted Value - ANSWER Value of the most accurate measurement
available, also referred to as the *true value*.
18.Accuracy - ANSWER Closeness of a measurement to the accepted value.
19.Dependent Variable - ANSWER Variable which is *measured*.
20.Independent Variable - ANSWER Variable which is *changed*.
21.Control Variables - ANSWER Variables kept *constant*.
22.Error Bar - ANSWER Representation of uncertainty displayed on a graph.
,23.Random Error - ANSWER Cause readings to be spread about the accepted
value, due to results varying in an *unpredictable* way from one result to
the next.
24.Systematic Error - ANSWER Cause readings to differ from the accepted
value by a *consistent* amount each time the measurement is made.
25.Percentage Uncertainty - ANSWER (Absolute Uncertainty/Mean Value) x
100
26.Precision of a Measurement - ANSWER Precise measurements are very
close to mean value, little variation.
27.Precision *only* depends on random errors and gives *no indication* of
how close the results are to the true/accepted value.
28.Precision of an Instrument - ANSWER Smallest *non-zero* reading that can
be measured by the instrument. Also referred to as sensitivity or resolution.
29.Range - ANSWER Difference between maximum and minimum values
either in a data set or that an instrument can measure.
30.Reliability - ANSWER If a measurement is *consistent* in the reading it
gives every time it is measured under *identical conditions*. Reliability can
be increased if errors are reduced.
31.Repeatable - ANSWER An experiment or measurement that gives the
*same* results when repeated by the *same* person using the *same*
equipment/techniques.
, 32.Reproducible - ANSWER An experiment or measurement that gives the
*same* results when repeated by *another* person or by using *different*
equipment/techniques.
33.Sensitivity of an Instrument - ANSWER Output response per unit input
quantity / how much the output changes when the input is changed by one
unit.
34.Uncertainty of a Measurement - ANSWER Interval within which the true
value of a measurement lies.
35.Valid Measurement - ANSWER Measurements that give the required
information by an acceptable method.
36.Zero Error - ANSWER Error when a measuring system gives a *non-zero*
value when the true value is *zero*. This would result in a systematic error.
37.Mechanical Waves - ANSWER Waves that travel through a substance.
38.Diffraction Grating - ANSWER A plate with may closely spaced parallel
slits ruled on it.
Cathode - ANSWER *Negative* Electrode
Reproducible - ANSWER An experiment or measurement that gives the *same*
results when repeated by *another* person or by using *different*
equipment/techniques.
