argiewalls · Physics · Units 3 & 4

01 During a one-minute revision round: Beta-minus decay converts a neutron into

A a proton, electron and antineutrino Charge and lepton number are conserved.

B a photon only This does not satisfy the stated relationship.

C two neutrons This does not satisfy the stated relationship.

D an alpha particle This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 1094 ms

02 Which response best completes this VCE-style item? Two coherent waves arrive in phase. They produce

A destructive interference This does not satisfy the stated relationship.

B photoelectric emission This does not satisfy the stated relationship.

C constructive interference Their displacements reinforce.

D polarisation only This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Waves · answered at 2820 ms

03 A student is checking a worked solution. Reducing uncertainty in position generally causes uncertainty in momentum to

A decrease to zero This does not satisfy the stated relationship.

B remain exactly fixed This does not satisfy the stated relationship.

C increase Position and momentum obey an inverse uncertainty relationship.

D become classical This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Uncertainty · answered at 4858 ms

04 A student is checking a worked solution. The gradient of a displacement–time graph gives

A momentum This does not satisfy the stated relationship.

B force This does not satisfy the stated relationship.

C acceleration This does not satisfy the stated relationship.

D velocity Velocity is the rate of change of displacement.

Written for icaijy.com · U2 · Motion · answered at 7525 ms

05 During a one-minute revision round: A straight-line graph with a non-zero intercept most clearly indicates

A zero uncertainty This does not satisfy the stated relationship.

B random error only This does not satisfy the stated relationship.

C a possible systematic offset A persistent intercept may reveal calibration or background bias.

D proof of causation This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Data analysis · answered at 9092 ms

06 A student is checking a worked solution. Moving a positive charge against an electric field generally

A decreases its charge This does not satisfy the stated relationship.

B leaves potential energy necessarily zero This does not satisfy the stated relationship.

C increases electric potential energy Work against the electric force stores potential energy.

D removes its mass This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Electric potential · answered at 10395 ms

07 Which response best completes this VCE-style item? An ideal black body is a perfect

A absorber and emitter of radiation A black body absorbs and emits electromagnetic radiation ideally.

B source of alpha particles This does not satisfy the stated relationship.

C mirror at every wavelength This does not satisfy the stated relationship.

D thermal insulator This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Radiation · answered at 13190 ms

08 During a one-minute revision round: A photon is the exchange particle for the

A strong interaction This does not satisfy the stated relationship.

B weak interaction This does not satisfy the stated relationship.

C electromagnetic interaction Photons mediate electromagnetic interactions.

D gravitational interaction in the Standard Model This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Standard Model · answered at 14603 ms

09 Which response best completes this VCE-style item? An ideal step-up transformer increases voltage and

A changes AC to DC This does not satisfy the stated relationship.

B increases power This does not satisfy the stated relationship.

C decreases current Ideal input and output powers are equal.

D increases current This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Transformers · answered at 16456 ms

10 A student is checking a worked solution. An alpha particle contains

A one proton and one neutron This does not satisfy the stated relationship.

B one electron This does not satisfy the stated relationship.

C two photons This does not satisfy the stated relationship.

D two protons and two neutrons It is a helium-4 nucleus.

Written for icaijy.com · U1 · Nuclear physics · answered at 17616 ms

11 A student is checking a worked solution. The energy of one photon is

A \(E=hf\) Photon energy is proportional to frequency.

B \(E=qV^2\) This does not satisfy the stated relationship.

C \(E=h/f\) This does not satisfy the stated relationship.

D \(E=mv\) This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Photons · answered at 19364 ms

12 A student is checking a worked solution. Adjacent nodes in a standing wave are separated by

A \(\lambda/4\) This does not satisfy the stated relationship.

B \(\lambda/2\) Nodes repeat every half-wavelength.

C \(2\lambda\) This does not satisfy the stated relationship.

D \(\lambda\) This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Standing waves · answered at 20977 ms

13 During a one-minute revision round: Discrete atomic emission lines provide evidence for

A absence of photons This does not satisfy the stated relationship.

B quantised energy levels Only particular photon-energy differences are emitted.

C continuous electron energies only This does not satisfy the stated relationship.

D classical planetary orbits alone This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Atomic spectra · answered at 22270 ms

14 According to special relativity, the speed of light in vacuum is

A the same for all inertial observers Invariant light speed is a postulate of special relativity.

B dependent on source speed This does not satisfy the stated relationship.

C zero in the photon frame This does not satisfy the stated relationship.

D larger for observers moving toward the source This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Relativity · answered at 24139 ms

15 Moving a positive charge against an electric field generally

A decreases its charge This does not satisfy the stated relationship.

B increases electric potential energy Work against the electric force stores potential energy.

C leaves potential energy necessarily zero This does not satisfy the stated relationship.

D removes its mass This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Electric potential · answered at 28566 ms

16 Which response best completes this VCE-style item? Above threshold, maximum photoelectron kinetic energy increases with

A exposure time only This does not satisfy the stated relationship.

B frequency \(K_{max}=hf-\phi\).

C surface area only This does not satisfy the stated relationship.

D intensity only This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Photoelectric effect · answered at 30781 ms

17 After three half-lives, the undecayed fraction is

A \(3/8\) This does not satisfy the stated relationship.

B \(1/6\) This does not satisfy the stated relationship.

C \(1/8\) \((1/2)^3=1/8\).

D \(1/3\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Half-life · answered at 35756 ms

18 During a one-minute revision round: Near Earth, gravitational potential energy change is

A \(mv\) This does not satisfy the stated relationship.

B \(m/gh\) This does not satisfy the stated relationship.

C \(mg\Delta h\) For a uniform field near Earth, ΔUg = mgΔh.

D \(ma\Delta h\) This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Energy · answered at 37832 ms

19 Which response best completes this VCE-style item? A perfectly inelastic collision conserves

A kinetic energy but not momentum This does not satisfy the stated relationship.

B momentum but not kinetic energy Objects stick; momentum is conserved in isolation but kinetic energy is transformed.

C the speed of each object This does not satisfy the stated relationship.

D neither momentum nor energy This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Collisions · answered at 40025 ms

20 During a one-minute revision round: Rest energy is given by

A \(E_0=mc^2\) Mass has rest-energy equivalent mc².

B \(E_0=mv\) This does not satisfy the stated relationship.

C \(E_0=m/c^2\) This does not satisfy the stated relationship.

D \(E_0=mc\) This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Relativity · answered at 41884 ms

21 During a one-minute revision round: For fixed transmitted power, increasing voltage reduces line loss because current

A increases This does not satisfy the stated relationship.

B decreases Loss \(P_{loss}=I^2R\), so lower current reduces heating.

C is unchanged This does not satisfy the stated relationship.

D becomes alternating This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Power transmission · answered at 44242 ms

22 Which response best completes this VCE-style item? The centripetal force on a satellite in circular orbit is supplied by

A its engines continuously This does not satisfy the stated relationship.

B air resistance This does not satisfy the stated relationship.

C a magnetic force This does not satisfy the stated relationship.

D gravity Gravity points towards the orbital centre.

Written for icaijy.com · U3 · Circular motion · answered at 45662 ms

23 During a one-minute revision round: The magnetic force on a moving charge is zero when velocity is

A opposite to its momentum This does not satisfy the stated relationship.

B at 45° only This does not satisfy the stated relationship.

C parallel to the field \(F=qvB\sin\theta\), so parallel motion gives zero.

D perpendicular to the field This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Magnetic forces · answered at 48576 ms

24 Discrete atomic emission lines provide evidence for

A absence of photons This does not satisfy the stated relationship.

B continuous electron energies only This does not satisfy the stated relationship.

C classical planetary orbits alone This does not satisfy the stated relationship.

D quantised energy levels Only particular photon-energy differences are emitted.

Written for icaijy.com · U4 · Atomic spectra · answered at 50211 ms

25 Which response best completes this VCE-style item? Temperature is most directly related to the particles’ average

A electric charge This does not satisfy the stated relationship.

B rest mass This does not satisfy the stated relationship.

C translational kinetic energy Temperature tracks average random translational kinetic energy.

D gravitational potential energy This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Thermal physics · answered at 54428 ms

26 Temperature is most directly related to the particles’ average

A gravitational potential energy This does not satisfy the stated relationship.

B translational kinetic energy Temperature tracks average random translational kinetic energy.

C electric charge This does not satisfy the stated relationship.

D rest mass This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Thermal physics · answered at 57656 ms

27 Which response best completes this VCE-style item? A 12 V device drawing 2.0 A uses power

A 144 W This does not satisfy the stated relationship.

B 6 W This does not satisfy the stated relationship.

C 10 W This does not satisfy the stated relationship.

D 24 W \(P=VI=24\ \mathrm W\).

Written for icaijy.com · U1 · Electrical energy · answered at 58984 ms

28 When a wave enters a new medium, its frequency usually

A becomes zero This does not satisfy the stated relationship.

B must double This does not satisfy the stated relationship.

C changes in inverse proportion to amplitude This does not satisfy the stated relationship.

D remains constant The boundary changes speed and wavelength, not source frequency.

Written for icaijy.com · U2 · Waves · not answered before time expired