SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 7 Set 1
Elektrik (English)
KUIZ INI MENGANDUNGI 10 SOALAN
1. A toaster has a heating element with a resistance of 40Ω. If it is connected to a 240 V power supply, what is its power dissipation?
2. A battery does 180 J of work to move 45 C of charge through a component in a circuit. What is the potential difference across the component?
3. A graph of potential difference (V) on the y-axis against current (I) on the x-axis is plotted for a constantan wire. What does the gradient of this graph represent?
4. Nichrome is often used for heating elements in appliances like toasters and electric kettles. Which property of nichrome makes it suitable for this purpose?
5. An electric heater has a power rating of 1500 W. How much electrical energy does it consume in 10 minutes?
6. Two copper wires, A and B, have the same length. Wire A has twice the diameter of wire B. How does the resistance of wire A (RA) compare to the resistance of wire B (RB)?
7. A conductor is considered 'non-ohmic' if:
8. The main purpose of a fuse in an electrical appliance is to:
9. A microwave oven operates on a 240 V supply and draws a current of 5.5 A. Which of the following standard fuses (1 A, 5 A, 10 A, 13 A) is the most appropriate choice for this appliance?
10. Which statement correctly describes the relationship defined by Ohm's Law for an ohmic conductor?
