argiewalls · Physics · Units 3 & 4

01 A student is checking a worked solution. Lenz’s law states that induced current acts to

A make flux zero at all times This does not satisfy the stated relationship.

B oppose the change in magnetic flux The opposing response is consistent with energy conservation.

C remove resistance This does not satisfy the stated relationship.

D reinforce every flux change This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Electromagnetic induction · answered at 2208 ms

02 A student is checking a worked solution. For fixed transmitted power, increasing voltage reduces line loss because current

A becomes alternating This does not satisfy the stated relationship.

B is unchanged This does not satisfy the stated relationship.

C increases This does not satisfy the stated relationship.

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

Written for icaijy.com · U3 · Power transmission · answered at 4008 ms

03 A result close to repeated measurements but far from the accepted value is

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

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

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

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

Written for icaijy.com · U2 · Measurement · answered at 8743 ms

04 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 10015 ms

05 A student is checking a worked solution. Beta-minus decay converts a neutron into

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

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

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

D two neutrons This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 11280 ms

06 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 12614 ms

07 During a one-minute revision round: 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 independent of wavelength This does not satisfy the stated relationship.

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

Written for icaijy.com · U4 · Diffraction · answered at 14127 ms

08 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 16909 ms

09 Which response best completes this VCE-style item? A device receives 100 J and delivers 75 J usefully. Its efficiency is

A 133% This does not satisfy the stated relationship.

B 100% This does not satisfy the stated relationship.

C 25% This does not satisfy the stated relationship.

D 75% Useful output divided by input is 0.75.

Written for icaijy.com · U1 · Efficiency · answered at 18301 ms

10 Which response best completes this VCE-style item? The area under a velocity–time graph gives

A displacement Integrating velocity over time gives displacement.

B force This does not satisfy the stated relationship.

C power This does not satisfy the stated relationship.

D acceleration This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 20425 ms

11 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 22114 ms

12 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 23665 ms

13 During a one-minute revision round: An alpha particle contains

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

B one electron This does not satisfy the stated relationship.

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

D two photons This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 24937 ms

14 Which response best completes this VCE-style item? The independent variable is the quantity that is

A measured as the outcome 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 kept constant This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Experimental design · answered at 26672 ms

15 During a one-minute revision round: Lenz’s law states that induced current acts to

A reinforce every flux change This does not satisfy the stated relationship.

B make flux zero at all times This does not satisfy the stated relationship.

C oppose the change in magnetic flux The opposing response is consistent with energy conservation.

D remove resistance This does not satisfy the stated relationship.

Written for icaijy.com · U3 · Electromagnetic induction · answered at 28285 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 30104 ms

17 Which response best completes this VCE-style item? 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 31271 ms

18 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 32691 ms

19 A student is checking a worked solution. A result close to repeated measurements but far from the accepted value is

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

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

C accurate but imprecise 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 35137 ms

20 A student is checking a worked solution. For constant mass, the net force equals

A \(mv^2\) always This does not satisfy the stated relationship.

B \(\vec p/t^2\) This does not satisfy the stated relationship.

C \(m\vec a\) Newton’s second law gives net force as mass times acceleration.

D \(m/\vec a\) This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Dynamics · answered at 36862 ms

21 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 38586 ms

22 During a one-minute revision round: Adjacent nodes in a standing wave are separated by

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

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

C \(\lambda/4\) 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 39870 ms

23 Two components connected in parallel have the same

A current in every branch This does not satisfy the stated relationship.

B resistance This does not satisfy the stated relationship.

C power This does not satisfy the stated relationship.

D potential difference Both ends connect to the same two nodes.

Written for icaijy.com · U1 · Circuits · answered at 42633 ms

24 Which response best completes this VCE-style item? Below the threshold frequency, increasing light intensity causes

A the threshold frequency to decrease This does not satisfy the stated relationship.

B emission after a fixed delay This does not satisfy the stated relationship.

C higher maximum electron energy This does not satisfy the stated relationship.

D no photoelectron emission Individual photons still lack sufficient energy.

Written for icaijy.com · U4 · Photoelectric effect · answered at 45563 ms

25 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 46805 ms

26 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 48442 ms

27 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 49913 ms

28 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 51768 ms

29 Which response best completes this VCE-style item? 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 53194 ms

30 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 54632 ms

31 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 57302 ms

32 During a one-minute revision round: An ideal black body is a perfect

A thermal insulator This does not satisfy the stated relationship.

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

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

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

Written for icaijy.com · U1 · Radiation · answered at 59375 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 · not answered before time expired