That y8 kid 🤣 - bot · guest · Physics

01 The gradient of a displacement–time graph gives

A force This does not satisfy the stated relationship.

B acceleration This does not satisfy the stated relationship.

C momentum 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 100 ms

02 Two components connected in parallel have the same

A power This does not satisfy the stated relationship.

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

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

D resistance This does not satisfy the stated relationship.

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

03 A student is checking a worked solution. Refraction occurs because light

A becomes charged This does not satisfy the stated relationship.

B changes frequency at the boundary This does not satisfy the stated relationship.

C changes speed between media A speed change produces a direction change except at normal incidence.

D loses all energy This does not satisfy the stated relationship.

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

04 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 \(m/\vec a\) 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

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

A force This does not satisfy the stated relationship.

B acceleration This does not satisfy the stated relationship.

C power This does not satisfy the stated relationship.

D displacement Integrating velocity over time gives displacement.

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

06 Two resistors in series always carry the same

A power This does not satisfy the stated relationship.

B current There is one path for charge flow.

C resistance This does not satisfy the stated relationship.

D voltage This does not satisfy the stated relationship.

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

07 During a one-minute revision round: Two components connected in parallel have the same

A resistance This does not satisfy the stated relationship.

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

C power This does not satisfy the stated relationship.

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

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

08 During a one-minute revision round: 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

09 During melting at constant pressure, added energy mainly

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

B destroys energy This does not satisfy the stated relationship.

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 100 ms

10 An ideal black body is a perfect

A thermal insulator This does not satisfy the stated relationship.

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

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

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

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

11 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 100 ms

12 During a one-minute revision round: A device receives 100 J and delivers 75 J usefully. Its efficiency is

A 75% Useful output divided by input is 0.75.

B 25% This does not satisfy the stated relationship.

C 133% This does not satisfy the stated relationship.

D 100% This does not satisfy the stated relationship.

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

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

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

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 thermal insulator This does not satisfy the stated relationship.

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

14 Wave frequency is determined by the

A medium alone This does not satisfy the stated relationship.

B amplitude This does not satisfy the stated relationship.

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

D source The source sets the oscillation frequency.

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

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

A thermal insulator This does not satisfy the stated relationship.

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

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

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

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

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

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

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

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

A two photons This does not satisfy the stated relationship.

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

Written for icaijy.com · U1 · Nuclear physics · answered at 100 ms

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

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

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

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

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

Written for icaijy.com · U1 · Half-life · answered at 100 ms

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

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

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

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

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

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

C must double This does not satisfy the stated relationship.

D becomes zero This does not satisfy the stated relationship.

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