CIE iGCSE Co-Ordinated Science P1.6.1 Energy Exam Style Questions Paper 3
Question
(a) Fig. 6.1 shows how the energy transfers in a television when 100 J of electrical energy are supplied.
(i) Calculate the energy transferred as sound.
energy = ………………………………………………. J
(ii) Complete the sentences using the energy transfers shown in Fig. 6.1.
The television is designed to transfer …………………………………………. energy
to ………………………………………. energy and …………………………………………. energy.
…………………………………………. energy is wasted by the television.
(iii) The weight of the television is 120 N.
Calculate the mass of the television.
The gravitational force on unit mass, g, is 10 N / kg.
mass = …………………………………………….. kg
(b) Fig. 6.2 shows the power socket which supplies electricity to a television, a laptop and a printer.
(i) State the electrical hazard visible on Fig. 6.2.
……………………………………………………………………………………………………………………
…………………………………………………………………………………………………………………….
(ii) Explain why the hazard identified in (b)(i) is not safe.
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………
(c) A ray of light from the television is reflected by a mirror.
This is shown in Fig. 6.3.
(i) State the name of the line XY.
…………………………………………………………………………………………………………………….
(ii) State which angle, a, b, c or d, is the angle of incidence.
…………………………………………………………………………………………………………………….
(iii) State the relationship between the angle of incidence and the angle of reflection.
…………………………………………………………………………………………………………………….
▶️Answer/Explanation
Ans: 6(a)(i) 5 (J) ;
6(a)(ii) electrical ;
light and sound ;
thermal ;
6(a)(iii) weight = mass × g (in any form) or mass = 120 ÷ 10 ;
= 12 (kg) ;
6(b)(i) frayed cables ;
6(b)(ii) danger of electrocution / short circuit ;
6(c)(i) normal ;
6(c)(ii) b ;
6(c)(iii) angle of incidence equals angle of reflection ;