VCE Physics 2021

The aim of darts is to hit the bullseye at the centre of a dartboard. Four darts players (A, B, C and D) each threw three darts. The results of their throws are shown below. Which one of the players produced a set of attempts that could be described as being precise but inaccurate?

• Player A

• Player B

• Player C

• Player D

The diagram below shows the electric field lines between four charged spheres: P, Q, R and S. The magnitude of the charge on each sphere is the same. Which of the following correctly identifies the type of charge that resides on each of the spheres P, Q, R and S?

• + positive

• - negative

• + positive

• - negative

The diagram in E below shows two parallel metal plates with opposite charges on each plate. X, Y and Z represent different distances from the positive plate. Which one of the following graphs best shows the electric field strength, E, versus the position, X, between the two parallel plates?

• A

• B

• C

• D

• 

The planet Phobetor has a mass four times that of Earth. Acceleration due to gravity on the surface of Phobetor is 18m/s². If Earth has a radius R, which one of the following is closest to the radius of Phobetor?

• R

• 1.5R

• 2R

• 4R

The diagram below shows a small DC electric motor, powered by a battery that is connected via a split-ring commutator. The rectangular coil has sides KJ and LM. The magnetic field between the poles of the magnet is uniform and constant. The switch is now closed, and the coil is stationary and in the position shown in the diagram. Which one of the following statements best describes the motion of the coil when the switch is closed?

• The coil will remain stationary.

• The coil will rotate in direction A, as shown in the diagram.

• The coil will rotate in direction B, as shown in the diagram.

• The coil will oscillate regularly between directions A and B, as shown in the diagram.

A magnet approaches a coil with six turns, as shown in the diagram below. During time interval Δt, the magnetic flux changes by 0.05 Wb and the average induced EMF is 1.2 V.

• 0.04s

• 0.01s

• 0.25s

• 0.50s

A mobile phone charger uses a step-down transformer to transform 240 V AC mains voltage to 5.0 V. The mobile phone draws a current of 3.0 A while charging. Assume that the transformer is ideal and that all readings are RMS.

• 48 A

• 16 A

• 1.2 A

• 0.06 A

The diagram below shows a simple electrical generator consisting of a rotating wire loop in a magnetic field, connected to an external circuit with a light globe, a split-ring commutator and brushes. The direction of rotation is shown by the arrow. Which one of the following best describes the function of the split-ring commutator in the external circuit?

• It delivers a DC current to the light globe.

• It delivers an AC current to the light globe.

• It ensures the force on the side of the loop nearest the north pole is always up.

• It ensures the force on the side of the loop nearest the north pole is always down

Lucy is running horizontally at a speed of 6 m/ along a diving platform that is 8.0 m vertically above the water. Lucy runs off the end of the diving platform and reaches the water below after time t. She lands feet first at a horizontal distance d from the end of the diving platform. Which one of the following expressions correctly gives the distance d?

• 0.8t

• 6t

• 0.5t²

• 6t+5t²

Which one of the following is closest to the time taken, t, for Lucy to reach the water below?

• 0.8s

• 1.1s

• 1.3s

• 1.6s