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- 1. Multiple Choice
The diagram shows a charged particle as it approaches a pair of charged parallel plates in a vacuum.
Which row describes the horizontal and vertical components of its motion as it travels between the plates?ABCD - 2. Multiple ChoiceThe resistance of a metal cube is measured by placing it between two parallel plates, as shown.
The cube has volume V and is made of a material with resistivity ρ. The connections to the cube have negligible resistance.
Which expression gives the electrical resistance of the metal cube between X and Y?ABCD - 3. Multiple ChoiceFour resistors of equal value are connected as shown.
How will the powers to the resistors change when resistor W is removed?The powers to X, Y and Z will all increase.The power to X will decrease and the powers to Y and Z will increase.The power to X will increase and the powers to Y and Z will decrease.The power to X will increase and the powers to Y and Z will remain unaltered. - 4. Multiple ChoiceTwo positive point charges P and Q are held a certain distance apart.
At which point(s) could the electric field strength, due to the charges, be zero?X onlyY onlyZ onlyX and Z only - 5. Multiple ChoiceTwo 6Ω resistors are connected in series with a 6V cell. A student incorrectly connects an ammeter and a voltmeter as shown.
The readings on the ammeter and on the voltmeter areABCD - 6. Multiple ChoiceWhich diagram best represents the electric field due to a negatively charged conducting sphere?ABCD
- 7. Multiple ChoiceA current carrying wire is in the same plane as a uniform magnetic field. The angle between the wire and the magnetic field is θ .
The magnetic force on the current carrying wire iszero.into the plane of the paper.out of the plane of the paper.at an angle θ to the direction of the magnetic field. - 8. Multiple ChoiceA charged particle of mass m and charge q is travelling in a uniform magnetic field with speed v such that the magnetic force on the particle is F. The magnetic force on a particle of mass 2m, charge q and speed 2v travelling in the same direction in the magnetic field is4F.2F.F.1/2F.
- 9. Multiple Choice
The tungsten lament of a lamp has a cross-sectional area A and length L.
For a potential difference V across the lament, the current in the filament is I.
The resistivity of the tungsten equals
A
B
C
D
- 10. Multiple ChoiceWhich of the following correctly gives the resistance of an ideal ammeter and resistance of an ideal voltmeter?ABCD
- 11. Multiple ChoiceIn the diagram, a long current-carrying wire is normal to the plane of the paper. The current in the wire is directed into the plane of the paper.
Which of the arrows gives the direction of the magnetic field at point P?WXYZ - 12. Multiple ChoiceWhen will 1 C of charge pass a point in an electrical circuit?when 1 A moves through a potential difference of 1 Vwhen a power of 1W is used for 1swhen the current is 5 mA for 200 swhen the current is 10A for 10s
- 13. Multiple ChoiceTwo copper wires of the same length but different diameters carry the same current. Which statement about the flow of charged particles through the wires is correct?Charged particles are provided by the power supply. Therefore the speed at which they travel depends only on the voltage of the supply.The charged particles in both wires move with the same average speed because the current in both wires is the same.The charged particles move faster through the wire with the larger diameter because there is a greater volume through which to flow.The charged particles move faster through the wire with the smaller diameter because it has a larger potential difference applied to it.
- 14. Multiple ChoiceA power cable X has resistance R and carries current I.
A second cable Y has resistance 2R and carries current 1/2I.
What is the ratio: power dissipated in Y / power dissipated in X ?1/41/224 - 15. Multiple ChoiceIn the circuit shown, the battery and ammeter each have negligible resistance. The following combinations of resistors are placed in turn between the terminals X and Y of the circuit. Which combination would give an ammeter reading of 8 A?ABCD
- 16. Multiple ChoiceWhich one of the following shows a correct circuit, using ideal voltmeters and ammeters, for measuring the I-V characteristic of a filament lamp?ABCD
- 17. Multiple Choice
A 12V battery has an internal resistance of 2.0Ω. A load of variable resistance is connected across the battery and adjusted to have resistance equal to that of the internal resistance of the battery.
Which statement is correct for this circuit?
The current in the battery is 6A.
The potential difference across the load is 12V.
The power dissipated in the battery is 18W.
The resistance in the circuit is 1.0Ω
- 18. Multiple Choice
A battery of internal resistance 2 Ω is connected to an external resistance of 10 Ω. The current is 0.5 A.
What is the emf of the battery?
1.0 V
5.0 V
6.0 V
24.0 V
- 19. Multiple Choice
An ion follows a circular path in a uniform magnetic field. Which single change decreases the radius of the path?
Increasing the mass of the ion
Increasing the charge of the ion
Increasing the speed of the ion
Decreasing the magnetic flux density of the field
- 20. Multiple Choice
The diagram shows the magnetic field surrounding two current-carrying metal wires P and Q. The wires are parallel to each other and at right angles to the plane of the page.
What is the direction of the electron flow in P and the direction of the electron flow in Q?
A
B
C
D
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