argiewalls · Physics · Units 3 & 4

01 For a projectile with negligible air resistance, total mechanical energy

A increases during descent This does not satisfy the stated relationship.

B equals kinetic energy at all points This does not satisfy the stated relationship.

C is zero at maximum height This does not satisfy the stated relationship.

D remains constant Gravity is conservative.

Written for icaijy.com · U3 · Energy · answered at 1792 ms

02 A student is checking a worked solution. A passenger lurches forward when a car brakes because of

A weight increasing This does not satisfy the stated relationship.

B inertia The passenger tends to maintain velocity unless acted on by a net force.

C loss of mass This does not satisfy the stated relationship.

D a forward engine force This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Newtonian motion · answered at 2888 ms

03 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 3975 ms

04 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 5188 ms

05 During a one-minute revision round: An ideal step-up transformer increases voltage and

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

B increases current This does not satisfy the stated relationship.

C decreases current Ideal input and output powers are equal.

D increases power This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Transformers · answered at 6613 ms

06 Beta-minus decay converts a neutron into

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

B two neutrons This does not satisfy the stated relationship.

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

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

Written for icaijy.com · U1 · Nuclear physics · answered at 7821 ms

07 During a one-minute revision round: Wave frequency is determined by the

A observer’s clock only This does not satisfy the stated relationship.

B medium alone This does not satisfy the stated relationship.

C source The source sets the oscillation frequency.

D amplitude This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Waves · answered at 9755 ms

08 At distance \(r\) from a point mass, gravitational field strength varies as

A \(1/r^2\) The inverse-square law applies.

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

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

D \(r^2\) This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Gravitation · answered at 11197 ms

09 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 12600 ms

10 Which response best completes this VCE-style item? The gradient of a displacement–time graph gives

A acceleration This does not satisfy the stated relationship.

B velocity Velocity is the rate of change of displacement.

C force This does not satisfy the stated relationship.

D momentum This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 13928 ms

11 During a one-minute revision round: Two resistors in series always carry the same

A power This does not satisfy the stated relationship.

B resistance This does not satisfy the stated relationship.

C current There is one path for charge flow.

D voltage This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 15780 ms

12 The de Broglie wavelength of a particle is

A \(\lambda=p/h\) This does not satisfy the stated relationship.

B \(\lambda=h/p\) Matter wavelength is inversely proportional to momentum.

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

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

Written for icaijy.com · U4 · Matter waves · answered at 17419 ms

13 Wave frequency is determined by the

A observer’s clock only This does not satisfy the stated relationship.

B source The source sets the oscillation frequency.

C amplitude This does not satisfy the stated relationship.

D medium alone This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Waves · answered at 21575 ms

14 Which response best completes this VCE-style item? Increasing sound amplitude most directly increases

A wave speed in the same medium This does not satisfy the stated relationship.

B frequency This does not satisfy the stated relationship.

C intensity Greater amplitude carries more energy per area per time.

D wavelength at fixed speed and frequency This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Sound · answered at 23067 ms

15 A student is checking a worked solution. Wave frequency is determined by the

A source The source sets the oscillation frequency.

B observer’s clock only This does not satisfy the stated relationship.

C amplitude This does not satisfy the stated relationship.

D medium alone This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Waves · answered at 24329 ms

16 Which response best completes this VCE-style item? After three half-lives, the undecayed fraction is

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

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

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

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

Written for icaijy.com · U1 · Half-life · answered at 25495 ms

17 A student is checking a worked solution. The double-slit interference pattern most directly demonstrates light’s

A wave behaviour Interference is characteristic of waves.

B rest mass This does not satisfy the stated relationship.

C electric charge This does not satisfy the stated relationship.

D sound speed This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Models of light · answered at 26707 ms

18 Which response best completes this VCE-style item? The magnetic force on a moving charge is zero when velocity is

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

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

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

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

Written for icaijy.com · U3 · Magnetic forces · answered at 28201 ms

19 Which response best completes this VCE-style item? For a projectile with negligible air resistance, total mechanical energy

A is zero at maximum height This does not satisfy the stated relationship.

B equals kinetic energy at all points This does not satisfy the stated relationship.

C remains constant Gravity is conservative.

D increases during descent This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Energy · answered at 29797 ms

20 A student is checking a worked solution. In an isolated collision, total

A force is zero throughout This does not satisfy the stated relationship.

B speed of each object is conserved This does not satisfy the stated relationship.

C momentum is conserved Internal impulses cancel, conserving total momentum.

D kinetic energy is always conserved This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Momentum · answered at 31973 ms

21 A student is checking a worked solution. Rest energy is given by

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

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

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

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

Written for icaijy.com · U3 · Relativity · answered at 33275 ms

22 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 34427 ms

23 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 35493 ms

24 Diffraction is most significant when aperture width is

A exactly zero frequency This does not satisfy the stated relationship.

B comparable to the wavelength Spreading becomes prominent at wavelength-scale openings.

C many orders larger than wavelength This does not satisfy the stated relationship.

D independent of wavelength This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Diffraction · answered at 36838 ms

25 An ideal step-up transformer increases voltage and

A increases current This does not satisfy the stated relationship.

B increases power This does not satisfy the stated relationship.

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

D decreases current Ideal input and output powers are equal.

Written for icaijy.com · U3 · Transformers · answered at 38803 ms

26 A student is checking a worked solution. 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 gravitational potential energy This does not satisfy the stated relationship.

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

Written for icaijy.com · U1 · Thermal physics · answered at 41783 ms

27 During a one-minute revision round: When a wave enters a new medium, its frequency usually

A must double This does not satisfy the stated relationship.

B becomes zero This does not satisfy the stated relationship.

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

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

Written for icaijy.com · U2 · Waves · answered at 43046 ms

28 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 44929 ms

29 Which response best completes this VCE-style item? The energy of one photon is

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

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

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

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

Written for icaijy.com · U4 · Photons · answered at 47313 ms

30 Adjacent nodes in a standing wave are separated by

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

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

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

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

Written for icaijy.com · U4 · Standing waves · answered at 48478 ms

31 A student is checking a worked solution. Two resistors in series always carry the same

A current There is one path for charge flow.

B power This does not satisfy the stated relationship.

C voltage This does not satisfy the stated relationship.

D resistance This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 49916 ms

32 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 51264 ms

33 During a one-minute revision round: A passenger lurches forward when a car brakes because of

A loss of mass This does not satisfy the stated relationship.

B a forward engine force This does not satisfy the stated relationship.

C inertia The passenger tends to maintain velocity unless acted on by a net force.

D weight increasing This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Newtonian motion · answered at 52764 ms

34 During melting at constant pressure, added energy mainly

A destroys energy This does not satisfy the stated relationship.

B increases particle potential energy Energy changes arrangement while temperature remains constant.

C reduces internal energy This does not satisfy the stated relationship.

D increases temperature continuously This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Thermal physics · answered at 54251 ms

35 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 55751 ms

36 A student is checking a worked solution. For a projectile with negligible air resistance, total mechanical energy

A remains constant Gravity is conservative.

B is zero at maximum height This does not satisfy the stated relationship.

C increases during descent This does not satisfy the stated relationship.

D equals kinetic energy at all points This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Energy · answered at 60000 ms