✨Jom Belajar FIZIK 2026✨

Chapter 6 (F4): Cahaya & Optik
(Light & Optics)

Explain how the paper burns through a magnifying glass.

1. The rays of the hot sun are parallel
2. The rays will converge to a focal point after passing through the lens
3. Light / energy will be focused
4. Light turns to heat and produce flame


🎥Credit: IG Physics

🇵🇸amazingPhysics🇵🇸

✨Jom Belajar FIZIK 2026✨

Chapter 6 (F4): Cahaya & Optik
(Light & Optics)


🇵🇸amazingPhysics🇵🇸

Carilah ilmu dengan hati yang ikhlas. Ilmu yang diberkati menjadi cahaya dunia dan akhirat.

Strive for Knowledge,
the A’s Will Follow

🇵🇸amazingPhysics🇵🇸

💡Jom jawab Fizik💡

Chapter 5 (F5): Elektronik (Electronic)

Jawapan: A
The diode pole is reversed.

Penjelasan
- Arus mengalir daripada terminal positif bateri ke terminal negatif.
- Dalam litar,LED dipasang secara pincang depan, jadi LED boleh menyala jika arus sampai kepadanya.
- diod di bahagian atas litar dipasang secara pincang songsang menyebabkan arus tidak dapat mengalir dalam litar.
- Apabila kutub diod diterbalikkan, diod menjadi pincang depan, arus dapat mengalir dan LED akan menyala.

📚Sumber: SPM FIZIK 2015

🇵🇸amazingPhysics🇵🇸

💡Jom jawab Fizik💡

Chapter 5 (F5): Elektronik (Electronic)

Isyarat input: arus ulang-alik
Input signal: alternating current

Isyarat output: arus terus
Output signal: direct current

Komponen X: diod
Component X: diode

Fungsi X: menukarkan arus ulang-alik ke arus terus
Function X: convert alternating current to direct current

Konsep fizik: rektifikasi gelombang separuh
Physics concept: half-wave rectification

📚Sumber: SPM FIZIK 2015

🇵🇸amazingPhysics🇵🇸

💡Jom jawab Fizik💡

Chapter 2 (F5): Tekanan (Pressure)

Jawapan: C
Density of river water < Density of sea water

Konsep Fizik: Daya apungan
Physics concept: Buoyant force

Prinsip Archimedes
Archimedes' Principle

Formula:
Fb = pVg
Fb = p(Ah)g

mv: ketumpatan cecair (density of liquid)

rv: isipadu cecair yang tersesar/kedalaman tenggelam (volume of liquid immersed/depth of sinking)

cv: daya apungan/buoyant force
⏩️ kapal yang sama (identical ship)


📚Sumber: SPM FIZIK 2016

🇵🇸amazingPhysics🇵🇸

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. Transistors are one of the basic building blocks of modern electronics. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.


🎙NPN transistors
- mainly used in switching applications

🎙PNP transistors
- used in amplification circuits and robotic applications
- PNP transistors to control current flow in heavy applications


💡Why NPN is mostly used than PNP transistor?
🔌The majority charge carriers in an NPN transistor are electrons
🔌the majority carriers in a PNP transistor are holes
🔌The electrons have better mobility than holes

🇵🇸amazingPhysics🇵🇸

✨Jom Belajar FIZIK 2026✨

Chapter 5 (F4): Gelombang
(Waves)

Interferens:
Superposisi dua atau lebih gelombang dari sumber gelombang yang koheren

Prinsip Superposisi Gelombang:
Apabila dua gelombang bertindih di suatu titik, sesaran paduan ialah hasil tambah sesaran individu bagi dua gelombang tersebut

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Interference of wave:
Superposition of two or more waves from a coherent source of wave

Principles of Superposition of
Wave:
When two waves overlap, the resultant displacement is the sum of individual displacements of the two waves

🎥Sumber: physicsmadefun

🇵🇸amazingPhysics🇵🇸

⚛️ Physics 10 MCQs ‼️

No calculators. Just vibes. 😌

1. What is the SI unit of force?
A) Joule
B) Newton
C) Watt
D) Pascal

⸻

2. Which quantity is a vector?
A) Speed
B) Distance
C) Velocity
D) Time

⸻

3. A car travels at a constant velocity. Which statement is true?
A) It is accelerating.
B) The resultant force acting on it is zero.
C) Its kinetic energy is zero.
D) It is not moving.

⸻

4. Which colour of visible light has the longest wavelength?
A) Violet
B) Blue
C) Green
D) Red

⸻

5. A convex lens forms a real image when the object is:
A) Between the lens and its focal point
B) At the focal point
C) Beyond the focal point
D) Touching the lens

⸻

6. Which appliance has the highest power rating?
A) 15 W LED bulb
B) 60 W fan
C) 1000 W electric kettle
D) 100 W television

⸻

7. Why are car tyres made with rough treads?
A) To reduce friction
B) To increase friction and improve grip
C) To reduce pressure
D) To increase speed

⸻

8. Which electromagnetic wave is commonly used in TV remote controls?
A) Radio waves
B) Microwaves
C) Infrared
D) Ultraviolet

⸻

9. Which quantity remains constant in a closed system?
A) Weight
B) Momentum (if no external force acts)
C) Speed
D) Force

⸻

10. Why do astronauts appear weightless while orbiting Earth?
A) There is no gravity in space.
B) They are in continuous free fall around Earth.
C) Air resistance supports them.
D) Their mass becomes zero.

Type your answers like this 👇
1.
2.
3.
…

Let’s see who can get a full score 🌱

Diagram 1 and Diagram 2 show a J-tube with both ends sealed, containing a fixed volume of liquid X and trapped air.In Diagram 1, an air pocket is trapped at the shorter arm, and the pressure at point A is P. The air is then moved to the top of the longer arm as shown in Diagram 2.

Here is one module that you guys can use to master calculation for F5 chap 1
Hope you guys success❤️