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 1125 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 2303 ms

03 In an isolated collision, total

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

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

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

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

Written for icaijy.com · U2 · Momentum · answered at 5062 ms

04 A student is checking a worked solution. A perfectly inelastic collision conserves

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

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

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

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

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

05 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 8032 ms

06 The electric field direction is the direction of force on a

A magnetic north pole This does not satisfy the stated relationship.

B negative electron This does not satisfy the stated relationship.

C neutron This does not satisfy the stated relationship.

D positive test charge Field direction is defined using a positive test charge.

Written for icaijy.com · U3 · Electric fields · answered at 9536 ms

07 The independent variable is the quantity that is

A kept constant This does not satisfy the stated relationship.

B ignored This does not satisfy the stated relationship.

C deliberately changed It is manipulated to test its effect.

D measured as the outcome This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Experimental design · answered at 11298 ms

08 A student is checking a worked solution. The area under a velocity–time graph gives

A displacement Integrating velocity over time gives displacement.

B acceleration This does not satisfy the stated relationship.

C power This does not satisfy the stated relationship.

D force This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 13546 ms

09 During a one-minute revision round: During melting at constant pressure, added energy mainly

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

B destroys energy This does not satisfy the stated relationship.

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

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

Written for icaijy.com · U1 · Thermal physics · answered at 15399 ms

10 During a one-minute revision round: A result close to repeated measurements but far from the accepted value is

A accurate but imprecise This does not satisfy the stated relationship.

B precise but inaccurate Small spread means precision; bias from accepted value means inaccuracy.

C both accurate and precise This does not satisfy the stated relationship.

D neither measurable nor valid This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Measurement · answered at 17831 ms

11 A student is checking a worked solution. A 12 V device drawing 2.0 A uses power

A 10 W This does not satisfy the stated relationship.

B 6 W This does not satisfy the stated relationship.

C 144 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 19149 ms

12 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 20362 ms

13 Which response best completes this VCE-style item? Diffraction is most significant when aperture width is

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

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

C exactly zero frequency 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 21509 ms

14 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 22848 ms

15 During a one-minute revision round: Conventional current in an external circuit is opposite to the drift of

A electrons Electrons carry charge opposite to conventional-current direction.

B photons This does not satisfy the stated relationship.

C positive ions in a metal lattice This does not satisfy the stated relationship.

D neutrons This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Electricity · answered at 24719 ms

16 A student is checking a worked solution. 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 perpendicular to the field 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 26320 ms

17 Which response best completes this VCE-style item? Two resistors in series always carry the same

A resistance This does not satisfy the stated relationship.

B current There is one path for charge flow.

C voltage This does not satisfy the stated relationship.

D power This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 28672 ms

18 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 31019 ms

19 Convection transfers energy mainly through

A bulk motion of a fluid Warmer fluid moves and carries internal energy.

B nuclear decay This does not satisfy the stated relationship.

C electron flow in a vacuum This does not satisfy the stated relationship.

D electromagnetic waves only This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Heat transfer · answered at 33003 ms

20 A student is checking a worked solution. Two coherent waves arrive in phase. They produce

A constructive interference Their displacements reinforce.

B photoelectric emission This does not satisfy the stated relationship.

C polarisation only This does not satisfy the stated relationship.

D destructive interference This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Waves · answered at 34487 ms

21 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 35827 ms

22 A student is checking a worked solution. Conventional current in an external circuit is opposite to the drift of

A electrons Electrons carry charge opposite to conventional-current direction.

B photons This does not satisfy the stated relationship.

C positive ions in a metal lattice This does not satisfy the stated relationship.

D neutrons This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Electricity · answered at 37498 ms

23 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 39005 ms

24 Which response best completes this VCE-style item? Adjacent nodes in a standing wave are separated by

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

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

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

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

Written for icaijy.com · U4 · Standing waves · answered at 40175 ms

25 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 41622 ms

26 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 45940 ms

27 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 47531 ms

28 A straight-line graph with a non-zero intercept most clearly indicates

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

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

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

D zero uncertainty This does not satisfy the stated relationship.

Written for icaijy.com · U4 · Data analysis · answered at 48992 ms

29 Which response best completes this VCE-style item? In an isolated collision, total

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

B force is zero throughout 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 51041 ms

30 A student is checking a worked solution. A device receives 100 J and delivers 75 J usefully. Its efficiency is

A 25% This does not satisfy the stated relationship.

B 133% This does not satisfy the stated relationship.

C 75% Useful output divided by input is 0.75.

D 100% This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Efficiency · answered at 52170 ms

31 During a one-minute revision round: The de Broglie wavelength of a particle is

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

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

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

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

Written for icaijy.com · U4 · Matter waves · answered at 54226 ms

32 Which response best completes this VCE-style item? Moving a positive charge against an electric field generally

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

Written for icaijy.com · U3 · Electric potential · answered at 56043 ms

33 During a one-minute revision round: The electric field direction is the direction of force on a

A negative electron This does not satisfy the stated relationship.

B neutron This does not satisfy the stated relationship.

C magnetic north pole This does not satisfy the stated relationship.

D positive test charge Field direction is defined using a positive test charge.

Written for icaijy.com · U3 · Electric fields · answered at 57541 ms

34 The area under a velocity–time graph gives

A acceleration This does not satisfy the stated relationship.

B power This does not satisfy the stated relationship.

C displacement Integrating velocity over time gives displacement.

D force This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 59769 ms

35 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 · not answered before time expired