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. What is the primary reason for coiling the wire of a heating element in an appliance like an electric kettle?
3. The main purpose of a fuse in an electrical appliance is to:
4. 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)?
5. 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?
6. Which statement correctly describes the relationship defined by Ohm's Law for an ohmic conductor?
7. An electric current of 0.8 A flows through a lamp for 3 minutes. What is the total electric charge that passes through the lamp?
8. 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?
9. A conductor is considered 'non-ohmic' if:
10. Nichrome is often used for heating elements in appliances like toasters and electric kettles. Which property of nichrome makes it suitable for this purpose?
