Singapore A-Level H2 Physics central themes overview quiz (SEAB 9749) quiz

Acceleration is constant in magnitude and always directed vertically downward, just as in free fall

Velocity is directly proportional to displacement and is greatest at the extremes of the oscillation

Acceleration is proportional to displacement and directed towards equilibrium ($a = -\omega^2 x$)

Acceleration is proportional to the square of the displacement and is directed away from equilibrium

$3.0\ \text{m s}^{-1}$

$1.5\ \text{m s}^{-1}$

$6.0\ \text{m s}^{-1}$

$2.0\ \text{m s}^{-1}$

Both follow an inverse-square law, with field strength proportional to $1/r^2$

Both are perfectly uniform everywhere, so the field strength is the same at every distance from the source

Both act only over very short ranges and fall abruptly to zero beyond a fixed cut-off distance from the source

Both can only ever be attractive, since like sources always pull towards one another regardless of their sign

The magnetic flux linkage itself, so that a large but steady flux always induces a large electromotive force

The rate of change of magnetic flux linkage

The total resistance of the circuit, so that a higher resistance directly produces a larger induced voltage

The square of the current flowing, in the same way that the power dissipated in a resistor depends on current

Because increasing the intensity of the light does not change the number of photons arriving each second

Because each photon's energy depends on frequency, and below threshold no single photon has enough energy

Because electrons can only be released when a strong external magnetic field is applied across the metal

Because the metal surface simply reflects all of the low-frequency light away before it can be absorbed at all

$\dfrac{1}{3}$

$\dfrac{1}{6}$

$\dfrac{1}{8}$

$\dfrac{1}{2}$

It is completely independent of temperature, depending instead only on the mass of each gas molecule

It is directly proportional to the Celsius temperature, so it falls to zero at the freezing point of water

It is inversely proportional to the absolute temperature, so the molecules slow down as the gas is heated

It is directly proportional to the absolute (thermodynamic) temperature

Physical constants or quantities in the relationship being tested

Nothing useful at all, since only the individual raw data points carry any real physical meaning here

Only the uncertainty in the apparatus, telling you nothing about the underlying relationship being tested

The total number of readings taken during the experiment, rather than any physical quantity of interest

Linear decrease with time

Constant value with time

Exponential decrease with time

Increase proportional to time squared

Because they all involve exactly the same particles acting as the source of each of the three fields

Because all three of these phenomena can only ever occur in a perfect vacuum with no matter present at all

Because they are all contact forces that act only when two objects are physically touching one another

Because they share a common structure of field strength, potential and force laws

The principle of superposition of waves

Conservation of momentum in elastic collisions between the particles of the medium carrying the wave

Newton's third law of motion, applied to the equal and opposite forces between neighbouring particles

The ideal gas law relating the pressure, volume and temperature of the medium through which waves travel

To violate conservation of energy, allowing electrical energy to be produced without any work being done

To conserve energy, so that work must be done against the induced effect

Because the flux linkage through the coil stays constant throughout each rotation of the generator armature

Because the resistance of the coil is what actually creates the induced electromotive force in the first place