CAPE Physics Unit 2 · May/June 2024 · Paper 2

28 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)2 marksDefine the term 'magnetic flux density'.
2. 1(b)(i)6 marksDraw a fully labelled diagram to illustrate the direction of the force, F, acting on a straight conductor of length L carrying a current, I, at an angle, θ, to a uniform magnetic field of flux density, B.
3. 1(b)(ii)2 marksWrite the expression for the force, F, experienced per unit length of the conductor in terms of B, I, L and θ.
4. 1(b)(iii)3 marksCalculate the magnitude of the magnetic force experienced by the wire.
5. 1(c)2 marksOn Figure 1, sketch the pattern of the magnetic field around the conductor in the plane normal to the axis of the conductor.
6. 1(d)(i)3 marksDetermine an expression for the magnitude of the force acting on the electron.
7. 1(d)(ii)3 marksDetermine an expression for the radius of this path.
8. 1(d)(iii)2 marksCalculate the radius of the path.
9. 1(e)(i)2 marksState Lenz's law.
10. 1(e)(ii)5 marksDescribe a simple experiment that can be performed to demonstrate Lenz's law.
11. 2(a)(i)3 marksDraw the symbol and the truth table for the two-input NAND logic gate.
12. 2(a)(ii)3 marksDraw the symbol and the truth table for the two-input OR logic gate.
13. 2(a)(iii)4 marksDraw the symbol and the truth table for the two-input EXNOR logic gate.
14. 2(b)8 marksComplete Table 1 by deducing the corresponding values of C', D, E and F.
15. 2(c)5 marksUse your truth table in (b) to determine and sketch the resulting output waveform on the grid provided in Figure 3. On your sketch, include the binary equivalent of the output waveform.
16. 2(d)7 marksDraw a circuit containing NAND gates only equivalent to that shown in Figure 2.
17. 3(a)6 marksIdentify EACH of the components labelled A-F.
18. 3(b)(i)2 marksComplete Column 3 of Table 2.
19. 3(b)(ii)4 marksOn the grid provided in Figure 5 on page 17, plot a graph of charge, Q, versus 1/V. Draw the line of best fit through the points.
20. 3(b)(iii)4 marksUse the graph in (b)(ii) to determine a value for the constant, K.
21. 3(c)(i)1 markWrite the equation expressing the equilibrium between the electrical force on a charge, Q, in a field of strength, E, and the gravitational force on a droplet of mass, m.
22. 3(c)(ii)1 markWrite the equation relating the magnitude of the electric field, E, to the impressed voltage, V, and plate separation, d.
23. 3(c)(iii)1 markWrite the equation expressing the mass, m, of the droplets in terms of the radius and density.
24. 3(d)(i)2 marksShow that Q is given by the equation Q = (1/V) [(4/3)πr³ρgd] by substituting the equations in (c)(ii) and (iii) into the equation stated in (c)(i).
25. 3(d)(ii)1 markHence, deduce an expression for K.
26. 3(d)(iii)3 marksDetermine a value for the magnitude of K.
27. 3(e)(i)1 markState the direction of the buoyancy force.
28. 3(e)(ii)4 marksCalculate the magnitude of the buoyancy force given that the density of air is 1.3 kg m⁻³.