Electric circuit

Diagram 1 shows an electric circuit containing two components R and X connected to a 6 V power supply.

Rajah 1 suatu litar elektrik yang mengandungi dua komponen R dan X disambungkan kepada bekalan kuasa 6 V.

Diagram 2 shows the graph of potential difference, V, against current, t, for component X.

Rajah 2 menunjukkan graf beza keupayaan, V, melawan , l, bagi komponen X.

Diagram 2

(a) What is the meaning of resistance?

Apakah maksud rintangan?

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(b) R is adjusted until the current flowing through component X becomes 1.2 A.

R dilaraskan sehingga arus yang mengalir melalui komponen X menjadi 1.2 A.

(i) Calculate the resistance of component X.
Hitungkan rintangan komponen X.




(ii) State the change to the resistance to the component X when R is adjusted so that the current flowing in the circuit increases.

Nyatakan perubahan kepada rintangan komponen X apabila R dilaraskan supaya arus yang mengalir dalam litar bertambah.

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(iii) Tick ( / ) the correct answer in the box provided.
Tanda (/) pada jawapan yang betul dalam kotak yang disediakan.

Component X is most likely a
Komponen X paling mungkin ialah





(c) Component X is connected to a potential difference of 1.5 V.
Calculate the power dissipated by R.
Komponen X disambung kepada beza keupayaan 1.5 v .
Hitungkan kuasa yang terlesap oleh R.