view_agenda
Questions
Find the perfect question by filtering through every previous QCAA Physics external exam question
notifications
Question Classifications
We’re conducting a final review of the classifications and formatting for our recently onboarded questions. If you have any feedback, please share it with us here.
QUESTION 4 The diagram shows a current-carrying loop moving from one magnetic field to another magnetic field in 0.600 seconds. B=3.00mT B=150mT X X X X X % > X X 2 X X X X X X X X X X X Not to scale Calculate the magnitude of the EMF produced in the current-carrying loop. (A) 126x10°°V (B) 126x107°V ) 126x107'v (D) 126x 10>V
QUESTION 5 Which of the following is Lenzs Law? (A) The total electric charge of an isolated system remains constant regardless of changes within the system. (B) The magnetic flux around a current-carrying wire changes in proportion to the rate of change of the current. (C) The direction of an induced electric current always opposes the change in the circuit or magnetic field that produces it. (D) The ratio of the sines of the angles of incidence and refraction of a wave is constant when the wave passes between two given media.
QUESTION 17 The definition of magnetic field is (A) (B) ©) (D) a region of space through which the total magnetic flux is measured. a region of space surrounding a body in which another body experiences a force of attraction. a region of space around an electrically charged particle or object within which a force would be exerted on other electrically charged particles or objects. a region of space near a magnet electric current or moving electrically charged particle in which a magnetic force acts on any other magnet electric current or moving electrically charged particle.
QUESTION 19 A solenoid with 24 loops of wire produces an EMF of 36 V during a magnetic flux change of 0.3 Wb. Calculate the period during which the magnetic flux varied. A) 02s (B) 05s C) 2.2s (D) 50s
QUESTION 28 (4 marks) The diagram shows a charged particle moving between two current-carrying wires. [ =4A r =0.5m qg=2nC e> v=333x10°ms L=05A Calculate the magnitude of the magnetic force acting on the charged particle. Magnetic force = N (to 2 decimal places)
QUESTION 2 (6 marks) A physicist measured the electric field strength at different distances away from a point charge. The data is plotted in the graph. Electric field strength (N ch a) b) 0 0.005 0.01 0.015 0.02 0.025 0.03 . er2 3 (m) : : : : 1 Identify the mathematical relationship between £ and [3 marks] r Use the mathematical relationship identified in 2a) to deduce the magnitude of the charge creating the electric field. [3 marks] C (to 1 decimal place)
QUESTION 5 (4 marks) An electron is situated halfway between two nuclei that are separated from each other by a distance of 4.5 x 107 m. The first nucleus contains two protons. The second nucleus contains three protons. Calculate the magnitude of the overall electromagnetic force experienced by the electron. N (to 1 decimal place)
QUESTION 6 (4 marks) The diagram shows a particle Q entering a uniform magnetic field of 0.090 T. The particle has a speed of 1.5 x 10°m s!. Once in the magnetic field the particle moves in a circular path as shown. O e __________________ B=0.090T It is suspected that Q 1s one of the particles listed in the table. Particle number | Charge g (C) Mass m (kg) Determine which particle Q is most likely to be.
QUESTION 4 The diagram shows two charges (¢ and g ) separated by a distance (d). d g@t> 0 There is a force F acting between the two charges. Calculate the magnitude of the force acting between the two charges if d is halved and the charge of ¢ is doubled. (A) 1IF (B) 2F (C) 4F (D) 8F
QUESTION 6 Electromagnetic radiation is (A) (B) © (D) extremely high-frequency radiation emitted from the nucleus of some radionuclides. the emission of energy as waves or particles especially high-energy particles that causes ionisation. a wave of energy produced by an oscillating electric charge resulting in mutually perpendicular electric and magnetic fields. radiant energy consisting of synchronised oscillations of electric and magnetic fields or electromagnetic waves propagated at the speed of light in a vacuum.
QUESTION 14 Moving electric charges in a magnetic field experience (A) adecrease in charge. (B) an increase in charge. (C) aforce parallel to the direction of the magnetic field. (D) a force perpendicular to the direction of the magnetic field.
QUESTION 17 Electrical potential energy is the (A) 1ntensity of an electric field at a particular location. (B) difference in potential that tends to give rise to an electric current. (C) capacity of electric charge carriers to do work due to their position in an electric circuit. (D) work done on an electron in accelerating it through an electrical potential difference of one volt.
QUESTION 21 (3 marks) 169.
QUESTION 23 (5 marks) The diagram shows a metal rod with a mass of 10.0 g and a length of 8.0 cm suspended in a uniform magnetic field of 0.50 T. There is no electric current through the metal rod when it is in Position 1. DC to power supply DC from power supply .'/ K\ Position 1 A;n Not to scale When a current (/) is passed through the metal rod it moves to Position 2 with an angle of 40° to the vertical. DC to power supply DC from power supply Position 2 Not to scale Determine the magnitude of the current required to move the metal rod into Position 2. Current = A (to 1 decimal place)
QUESTION 1 (3 marks) A charge of 2.8 x 1077 C experiences an electrostatic force of 5.2 X 10~ N when placed near a charge of 32%x 1077 C. Calculate the distance between the two charges. Distance = m (to 2 significant figures)
QUESTION 6 (4 marks) The diagram shows the magnetic field lines inside a solenoid carrying a current of 2 A. P l__--- Not to scale a) Calculate the number of turns per metre that would produce a magnetic field strength of 300 uT at Point P. [3 marks] b) Determine the direction of the magnetic field produced by the solenoid. [1 mark]
QUESTION 1 Electromotive force is (A) the production of voltage across an electrical conductor due to its dynamic interaction with a magnetic field. (B) adifference in potential that tends to give rise to an electric current. (C) the repulsion experienced by two negatively charged particles. (D) one of the four fundamental forces.
QUESTION 7 Which change would produce the greatest increase in magnetic field strength inside a current-carrying solenoid? (A) decreasing the thickness of the wire (B) increasing the length of the solenoid (C) adding more turns of wire to the solenoid (D) using an alternating current instead of a direct current
QUESTION 10 Electric field strength refers to the (A) 1ntensity of an electric field at a particular location. (B) change in electrical potential energy between two defined points. (C) sum of electrically charged particles passing a point in a given time. (D) physical property of an object experiencing a force in an electromagnetic field.
QUESTION 13 A rectangular coil of 3000 turns and dimensions 0.1 m x 0.2 m is rotated in a uniform magnetic field of 2 mT. Calculate the minimum number of revolutions per second required to produce an average EMF of 6 V. A) 1 (B) 3 (C) 13 (D) 50
QUESTION 18 The primary and secondary coils from a lossless transformer are shown. Primary Secondary Compared to the primary coil the secondary coil will experience decreased (A) power. (B) current. (C) wvoltage. (D) resistance.
QUESTION 19 A current-carrying wire is placed perpendicular to two magnets. As the current in the wire is changed the force acting on it is recorded. P - P - : : : ______________________________________________________________________ e e ] ) : ' 5 ' ' ' ; : : / ' i | -7 - . : . ~ : | : e : : T : 1 -~ : Z 4 ¥ b . : LT : | Msssrmmseme sEReRslE SEnesgEaisse sasrassae Rel Siemini S ____-________i_-____-______ _____-_;_;; f _________________________________________ S : T 3 ' - ' N T @ ' 0 .- O [ - : . o ; - - - - - - 0 0.2 0.4 0.6 0.8 1.0 Current (A) The gradient of the line of best fit is proportional to the (A) potential difference. (B) electromotive force. (C) resistance of the wire. (D) magnetic field strength.
QUESTION 24 (3 marks) A rectangular loop is placed in a uniform magnetic field of 5 mT. <20 cm= Not to scale Calculate the change in flux through the loop when it is rotated 60° around the vertical axis. Show your working. Change in flux = Wb (to two significant figures)
QUESTION 25 (2 marks) Describe how electromagnetic radiation is propagated by the interaction between electric and magnetic fields.
QUESTION 4 The correct definition of Coulombs law is (A) (B) ©) (D) the total electric charge of an isolated system remains constant regardless of changes within the system. the direction of an induced electric current always opposes the change in the circuit or the magnetic field that produces it. when the magnetic flux linking a circuit changes an electromotive force (EMF) is induced in the circuit proportional to the rate of change of the flux linkage. like electric charges repel and opposite electric charges attract with a force proportional to the product of the electric charges and inversely proportional to the square of the distance between them.
QUESTION 7 Calculate the electric field strength (E) at 2 cm from a charge of 2.5 C. (A) 5.6x10°NC' (B) 23 x10°NC (C) 11x102NC! (D) 5.6 x10°NC
QUESTION 9 The diagram below shows a wire that is carrying an electric current. Point Y o 1 i The direction of the magnetic field around the wire at point Y is (A) up the page. (B) 1nto the page. (C) down the page. (D) out of the page.
QUESTION 16 Complete the following definition of magnetic flux density by identifying the two missing words. The strength of a magnetic field or the number of lines per unit area. (A) magnetic field (B) magnetic force (C) electromagnetic field (D) electromagnetic force
QUESTION 20 Complete the following. (A) (B) © (D) A moving electric charge generates a meson field. baryon field. magnetic field. gravitational field.
QUESTION 25 (4 marks) The diagram below shows a moving charged particle in a magnetic field. X X X X X X X X B=0.02T X X X X X Calculate the mass of the charged particle using the information provided in the diagram above. Show your working. Express the solution using scientific notation. Mass = kg (to 1 decimal place)
QUESTION 2 (2 marks) The diagram below shows an electric current-carrying wire. Calculate the magnitude and direction of the magnetic field around the electric current-carrying wire at point A. Show your working. Express the solution using scientific notation. Magnitude=_____ @@ T (to the nearest whole number) Direction =
QUESTION 3 A current-carrying wire is shown. 2.0 cm Nottoscale J=0.5A Determine the magnetic field strength at X. (A) 5x 10° T out of the page (B) 5x 10° T into the page (C) 5x 10°* T out of the page (D) 5x 10° T into the page
QUESTION 9 A magnet is passed through a solenoid comprising five turns and a cross-sectional area of 0.60 m” to produce an EMF of 0.75 V. Calculate the EMF if the same magnet passes through another solenoid with three times as many turns and half the cross-sectional area at the same rate. (A) 0.89V (B) 1.1V (C) 4.0V (D) 4.5V
QUESTION 11 Coulomb’s law describes the observation that (A) an electromotive force in a circuit may be induced through changes in the magnetic flux. (B) charged particles moving across magnetic field lines experience a force. (C) achange in the electromotive force is opposed. (D) like electric charges repel one another.
QUESTION 13 A magnet moving through a coil of wire will induce a current with a magnetic field (A) parallel to the electric field. (B) opposite in direction to the change in flux. (C) inversely proportional to the electromotive force. (D) that will continue to fluctuate once the magnet is removed.
QUESTION 19 Calculate the electric field strength experienced at a distance of 2.8 x107!! m from the centre of a helium nucleus. (A) 1.0x10°NC! (B) 2.0x10°NC! (C) 3.7x10?NC! (D) 7.3xl0*NC!
QUESTION 24 (4 marks) A solenoid consisting of 1240 turns is shown. Not to scale 40 cm IT=0.50A Determine the magnitude and direction of the magnetic field inside the solenoid. Show your working. Magnitude = T (to two significant figures) Direction =
QUESTION 3 (8 marks) Three charges are in a straight line as shown. +5.0 wC +5.0 uC +40 uC S T U e~«~_ re 2r e Net force on T= +2.8 N a) Calculate the electric field strength at 7. Show your working. [2 marks] Electric field strength = NC! (to two significant figures) b) Determine the value of r. Show your working. [6 marks] r= m (to two significant figures)
QUESTION 8 (6 marks) A length of wire AB is placed across an incomplete loop sitting within a magnetic field as shown. Wire AB then moves with a constant velocity of 40 m gt creating an induced EMF of 23 pV. xX xX x xX xX xX x 1.4m x x x x x x x Not to scale a) Determine the magnitude of the magnetic field strength experienced by the loop. Show your working. [4 marks] Magnetic field strength = T (to two significant figures) b) Draw aconclusion about the direction of the induced current within the loop. Justify your reasoning. [2 marks]
No results found
open_with
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_1.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_2.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_3.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_4.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_5.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_6.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_7.webp)
![Formula-Book-Image](https://examinsightsimages.syd1.cdn.digitaloceanspaces.com/Physics/Physics_Formula_Sheet_8.webp)