CSEC Physics · 1993 · Paper 2

20 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(i)2 marksDetermine the time interval represented between the first and last dots on the tape in Figure 1 and in Figure 2.
2. 1(ii)4 marksBy considering displacements from point A in each case, complete CAR - Table 1 and TRUCK - Table 2.
3. 1(iii)6 marksUse the information in the completed tables to plot displacement (x) – time (t) graphs on the axes provided.
4. 1(iv)2 marksDescribe briefly the motion of the toy car and the toy truck.
5. 1(v)2 marksUse the information in the completed Table 2 to determine the average speed of the truck over the total time interval.
6. 2(a)(i)2 marksDefine 'specific heat capacity'.
7. 2(a)(ii)2 marksExplain what is meant by the term 'efficiency'.
8. 2(b)(i)3 marksState the useful energy changes taking place in an oil-fired power station.
9. 2(b)(ii)1 markIn a power station, thermal energy is wasted at the rate of 660 MW. How many joules of energy are wasted in ONE second?
10. 2(b)(iii)3 marksA nearby river is used to absorb the waste heat. A mass of 6 x 10^4 kg of water passes the power station every second. What is the temperature rise of the water if it absorbs all the waste heat? [Specific heat capacity…
11. 2(iv)3 marksAn alternative way of disposing of the waste heat is to use it to evaporate water in the power station. How much water would have to be evaporated EACH second if the latent heat of vaporisation of water is 2.3 x 10^6 J…
12. 2(v)2 marksElectricity is produced at 6 600 V a.c. and stepped up to 132 000 V for distribution. State how the potential is raised and give ONE advantage of transmitting at a higher potential.
13. 3(a)(i)1 markExplain why no current flows when someone touches just ONE terminal of a 12 V car battery.
14. 3(a)(ii)7 marksA boy touches one terminal of a 12 V car battery with his right hand and the other terminal with his left hand simultaneously. Calculate the current flowing with dry hands and with wet hands, and state what effect, if…
15. 3(b)(i)3 marksCalculate the electrical energy that is stored in the machine.
16. 3(b)(ii)3 marksThe total charge is passed in a current lasting 5 ms. Calculate this current.
17. 4(i)6 marksCalculate the wavelength of the radiation and the number of waves emitted in a pulse.
18. 4(ii)3 marksThe power of the transmitter is 200 kW. What is the total energy in a pulse?
19. 4(iii)3 marksAfter pulse emission, nothing is transmitted for one millisecond. Calculate how far the pulse travels in this time.
20. 4(iv)2 marksTo detect a distant object, the pulse reflects and must return to the station before another pulse is emitted. What is the furthest distance at which an object may be detected using this system?