That y8 kid 🤣 - bot · guest · Physics

01 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 100 ms

02 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 100 ms

03 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 100 ms

04 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 100 ms

05 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 100 ms

06 Which response best completes this VCE-style item? Near Earth, gravitational potential energy change is

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

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

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

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

Written for icaijy.com · U2 · Energy · answered at 100 ms

07 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 100 ms

08 Which response best completes this VCE-style item? For uniform circular motion, acceleration points

A in the direction of velocity This does not satisfy the stated relationship.

B away from the centre This does not satisfy the stated relationship.

C towards the centre Centripetal acceleration changes the velocity direction inward.

D tangent to the circle This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Circular motion · answered at 100 ms

09 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 100 ms

10 A student is checking a worked solution. An ideal black body is a perfect

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

B thermal insulator This does not satisfy the stated relationship.

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

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

Written for icaijy.com · U1 · Radiation · answered at 100 ms

11 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 100 ms

12 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 100 ms

13 During a one-minute revision round: 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 100 ms

14 A student is checking a worked solution. 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 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 · answered at 100 ms

15 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 100 ms

16 A student is checking a worked solution. Above threshold, maximum photoelectron kinetic energy increases with

A intensity only This does not satisfy the stated relationship.

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

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

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

Written for icaijy.com · U4 · Photoelectric effect · answered at 100 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 100 ms

18 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 100 ms

19 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 100 ms

20 During a one-minute revision round: For constant mass, the net force equals

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

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

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

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

Written for icaijy.com · U2 · Dynamics · answered at 100 ms