To know more about Topic 8 (ELECTROMAGNETISM) you may click the link below:
http://www.physics4spm.com/search/label/3.1%20Analysing%20Electromagnet
Saturday, July 24, 2010
Friday, July 23, 2010
Laman Web skoool.co.uk
Please click the link below to learn Physics Form 4 and Form 5 interactively.
Happy learning!!!!!!!!!
http://segfl.skoool.co.uk/keystage3.aspx?id=93#1_12
Happy learning!!!!!!!!!
http://segfl.skoool.co.uk/keystage3.aspx?id=93#1_12
SPM FORM 5 PHYSICS
Cathode Ray Oscilloscope (C.R.O)
To understand this topic, u must understand the following definition:
Themionic emission: - the release of electrons from a heated metal cathode
From the process of thermionic emission, we can produce cathode ray... By the way, what is chathode ray??
Cathode ray defined as a beam of electrons moving at high speed in a vacuum.
This cathode ray concept is widely used in making TV. In SPM, we apply its concept in understanding the uses of Cathode Ray Oscilloscope.
Before applying CRO, u must understand the properties of the cathode ray itself. Make sure u hafal all those properties such as:
-moving in straight line
-negatively charged
-deflected by electric & magnetic field and etc.
Once u've understood & investigated all the properties..then lets have a look at the structure of the device called CRO:
Like it or not this chapter requires u to hafal all those structure of CRO. Besides that, u need also to memorise their function as they might be asked in the exam.
Then, u must understand the working principle of CRO and how to calculate the voltage + frequency of a waveform.
To calculate the voltage & frequency, u must understand to use 2 important button in CRO, i.e
'Y-Gain' & 'Time base'
Cathode Ray Oscilloscope (C.R.O)
To understand this topic, u must understand the following definition:
Themionic emission: - the release of electrons from a heated metal cathode
From the process of thermionic emission, we can produce cathode ray... By the way, what is chathode ray??
Cathode ray defined as a beam of electrons moving at high speed in a vacuum.
This cathode ray concept is widely used in making TV. In SPM, we apply its concept in understanding the uses of Cathode Ray Oscilloscope.
Before applying CRO, u must understand the properties of the cathode ray itself. Make sure u hafal all those properties such as:
-moving in straight line
-negatively charged
-deflected by electric & magnetic field and etc.
Once u've understood & investigated all the properties..then lets have a look at the structure of the device called CRO:
Like it or not this chapter requires u to hafal all those structure of CRO. Besides that, u need also to memorise their function as they might be asked in the exam.
Then, u must understand the working principle of CRO and how to calculate the voltage + frequency of a waveform.
To calculate the voltage & frequency, u must understand to use 2 important button in CRO, i.e
'Y-Gain' & 'Time base'
FORM 5 PHYSICS
CRO:Measuring Voltage & Frequency
Ok, today i'm gonna continue our discussion on Cathode Ray Oscilloscope. In last post i did mention one of the purpose using CRO is to measure voltage & frequency of a waveform.
To do this, we must understand the function of 'Y-gain & Time base'
Y-Gain:
- it is used to set the scales for the y-axis. Let say if u set the button at 10V/division..it means the y-axis has a scales of 0V,10V,20V,30V .....i.e each division has 10V.
Time base:
-meanwhile timebase is used to set the scales for x-axis. If the timebase is set to 10ms, i.e each division has 10miliseconds.
CRO:Measuring Voltage & Frequency
Ok, today i'm gonna continue our discussion on Cathode Ray Oscilloscope. In last post i did mention one of the purpose using CRO is to measure voltage & frequency of a waveform.
To do this, we must understand the function of 'Y-gain & Time base'
Y-Gain:
- it is used to set the scales for the y-axis. Let say if u set the button at 10V/division..it means the y-axis has a scales of 0V,10V,20V,30V .....i.e each division has 10V.
Time base:
-meanwhile timebase is used to set the scales for x-axis. If the timebase is set to 10ms, i.e each division has 10miliseconds.
Score A Physics Form 4
Program Score A Physics Form 4
Tarikh :19 Julai 2010
Masa :3.30 pm - 5.00 pm
Tempat : Dewan As Sharifah
Sasaran: Pelajar Ting.4
Pelajar didedahkan dengan teknik menjawab soalan format SPM. Soalan-soalan yang dibincangkan :
1. Soalan Sec.B (5 markah)
2. Soalan Sec.B (10 markah)-Respons terbuka
3. Soalan Sec.C (10 markah)
Pelajar digalakkan menjawab soalan-soalan esei tersebut dalam bentuk jadual (table).
Cikgu harap semua yg hadir pada majlis ilmu tersebut datang dengan ikhlas untuk belajar kerana Allah. Moga Allah memudahkan urusan kita. Moga semua akan `score A'.AMIN!! Insya Allah.
Yg baik semuanya dari Allah, dan yg kurang itu atas kelemahan saya sendiri. Maaf.
Terima kasih atas kerja sama semua. Terima kasih jg buat Cik Saidatul Akma (juru teknik sek) atas bantuan teknikal. (Terima kasih daun keladi, lain kali nk minta tolong lagi).
Tarikh :19 Julai 2010
Masa :3.30 pm - 5.00 pm
Tempat : Dewan As Sharifah
Sasaran: Pelajar Ting.4
Pelajar didedahkan dengan teknik menjawab soalan format SPM. Soalan-soalan yang dibincangkan :
1. Soalan Sec.B (5 markah)
2. Soalan Sec.B (10 markah)-Respons terbuka
3. Soalan Sec.C (10 markah)
Pelajar digalakkan menjawab soalan-soalan esei tersebut dalam bentuk jadual (table).
Cikgu harap semua yg hadir pada majlis ilmu tersebut datang dengan ikhlas untuk belajar kerana Allah. Moga Allah memudahkan urusan kita. Moga semua akan `score A'.AMIN!! Insya Allah.
Yg baik semuanya dari Allah, dan yg kurang itu atas kelemahan saya sendiri. Maaf.
Terima kasih atas kerja sama semua. Terima kasih jg buat Cik Saidatul Akma (juru teknik sek) atas bantuan teknikal. (Terima kasih daun keladi, lain kali nk minta tolong lagi).
Wednesday, July 21, 2010
Pertandingan Teknologi Pelancaran Roket Negeri Melaka 2010
Tarikh : 21 Julai 2010
Masa: 8.00 pagi - 6.00 petang
Tempat : Padang Sekolah SMK Bukit Baru
Keputusan:
Pasukan Terbaik: SMK Yok Bin
Kategori Parachute :1. SMK Yok Bin
2. SMK Tinggi Melaka
3. SMK St.David
Kategori Sasaran : 1. SMK IJC
2. SBPI Selandar
3. SMK Teknik Jasin
Tahniah jg kpd pasukan sek sbb semua parachute terbuka, cuma rezeki tak ada. Thanks for your co operations. Setiap pertandingan mesti ada kalah menang. Hope you all get the excitement & the experieces.
Model roket yg masuk pertandingan tu cikgu letakkan di makmal Fz. Nanti boleh buat post mortem.
Masa: 8.00 pagi - 6.00 petang
Tempat : Padang Sekolah SMK Bukit Baru
Keputusan:
Pasukan Terbaik: SMK Yok Bin
Kategori Parachute :1. SMK Yok Bin
2. SMK Tinggi Melaka
3. SMK St.David
Kategori Sasaran : 1. SMK IJC
2. SBPI Selandar
3. SMK Teknik Jasin
Tahniah jg kpd pasukan sek sbb semua parachute terbuka, cuma rezeki tak ada. Thanks for your co operations. Setiap pertandingan mesti ada kalah menang. Hope you all get the excitement & the experieces.
Model roket yg masuk pertandingan tu cikgu letakkan di makmal Fz. Nanti boleh buat post mortem.
Tuesday, July 20, 2010
Sunday, July 18, 2010
A TRANSISTOR
This topic is a bit tricky, coz in SPM we didnt learn the actual details about transistor working principle and u need to memorise certain facts. In order to understand a transistor, firstly u must get to know its structure & terminal. Transistor has 3 terminals, i.e a base, collector & emitter terminal. There are two type of transistor, please make sure u memorize the different between them.
The first type is called N-P-N:
The second type is P-N-P:
Main function of a transistor is to amplify small current.So its a must for u to explain how does a transistor amplify the current.
Transistor
Transistor as Current Amplifier:
Transistor is a component which relies on the current that flows in its base terminal.
A small changes in base current (Ib) causes bigger change in collector current (Ic).
The analogy is simple, if u attend morning assembly in school..usually the teacher was talking using a microphone. What actually causes the teacher's voice become louder?? Is it the microphone alone??
Actually..its the amplifier which has a transistor that did the job to amplify the voice.
Please make sure u refer your reference book on its circuit arrangement as well as its experiment.
Transistor as a switch:
This part is important in SPM..u must be able to understand and memorise its circuit arrangement.
To switch ON the transistor, we need to have:
a higher resistance in the base-emitter circuit
this causes a bigger voltage dropped across the resistor in base-emitter circuit
In the end there's enough current flowing thru the base terminal to switch ON the transistor
i'll discuss detail abt this soon.....to be continued
The first type is called N-P-N:
The second type is P-N-P:
Main function of a transistor is to amplify small current.So its a must for u to explain how does a transistor amplify the current.
Transistor
Transistor as Current Amplifier:
Transistor is a component which relies on the current that flows in its base terminal.
A small changes in base current (Ib) causes bigger change in collector current (Ic).
The analogy is simple, if u attend morning assembly in school..usually the teacher was talking using a microphone. What actually causes the teacher's voice become louder?? Is it the microphone alone??
Actually..its the amplifier which has a transistor that did the job to amplify the voice.
Please make sure u refer your reference book on its circuit arrangement as well as its experiment.
Transistor as a switch:
This part is important in SPM..u must be able to understand and memorise its circuit arrangement.
To switch ON the transistor, we need to have:
a higher resistance in the base-emitter circuit
this causes a bigger voltage dropped across the resistor in base-emitter circuit
In the end there's enough current flowing thru the base terminal to switch ON the transistor
i'll discuss detail abt this soon.....to be continued
SEMICONDUCTOR DIODES
In SPM, u must be able to describe semiconductor diode. How to describe it??
When p-type & n-type semiconductor is joined together, a semiconductor diode is produced.
At p-n jucntion, a depletion layer is formed when the electron from the n-type fill in the hole in the p-type.
Connecting p-type to the +ve terminal and n-type to the -ve terminal causing the electron in the n-type to be pulled and filled in the holes across the junction. This movementof electron allow current to flow, thus the diode is forward biased.
When the connection is reversed i.e p-type to -ve terminal & n-type to the +ve terminal, the diode is reverse biased. Electron is pulled away from crossing the jucntion, thus no current is flowing.
This shows that diode allow current to flow in one direction only.
Then u must appreciate the function of diode as rectifier. What is rectifier???
Diode as rectifier can convert AC current into DC current.
The process of conveting AC to DC current is known as rectification. There are two type of rectification that u need to understand in SPM. For each case u must hafal the waveform and its circuit connection. Lets analyse both of them;
1. Half wave rectification (refer to your book, then watch this!)
2. Full wave rectification (refer to your book, then watch this!)
After knowing the different waveform produce for those rectifiers..u also need to draw the waveform appear due to capacitor smoothing effect. Make sure u refer them back in your reference book.
Good luck guys!!!
When p-type & n-type semiconductor is joined together, a semiconductor diode is produced.
At p-n jucntion, a depletion layer is formed when the electron from the n-type fill in the hole in the p-type.
Connecting p-type to the +ve terminal and n-type to the -ve terminal causing the electron in the n-type to be pulled and filled in the holes across the junction. This movementof electron allow current to flow, thus the diode is forward biased.
When the connection is reversed i.e p-type to -ve terminal & n-type to the +ve terminal, the diode is reverse biased. Electron is pulled away from crossing the jucntion, thus no current is flowing.
This shows that diode allow current to flow in one direction only.
Semiconductor diode
Then u must appreciate the function of diode as rectifier. What is rectifier???
Diode as rectifier can convert AC current into DC current.
The process of conveting AC to DC current is known as rectification. There are two type of rectification that u need to understand in SPM. For each case u must hafal the waveform and its circuit connection. Lets analyse both of them;
1. Half wave rectification (refer to your book, then watch this!)
2. Full wave rectification (refer to your book, then watch this!)
After knowing the different waveform produce for those rectifiers..u also need to draw the waveform appear due to capacitor smoothing effect. Make sure u refer them back in your reference book.
Good luck guys!!!
Monday, July 5, 2010
TOP TEN PHYSICS- MID YEAR EXAM
FORM 5.
1. NUR FATIN NADHIRAH BT.SULAIMAN 5 AK 82
2. FAIRUZ SHAFIQAH BT. ABDULLAH 5 AK 73
3. SITI UMMIRA BT.MD.SAID 5 AK 73
4. NUR AIN BT.ZAFRUDIN 5 IK 71
5. SYAZWANI BT.MANSOR 5 AK 70
6. NURUL HUDA BT.BORHAN 5 IR 70
7. SYAHIRAH BT.ABD.RAZAK 5 AK 70
8. NURAZZAH BT.AZRAIE 5 AK 70
9. NUR ZAHIRAH BT.ABD.RANI 5 AK 70
10. HUDA SHAMILAH BT.M.NASIR 5 IK 70
11. AISHAH BT.MOHAMED 5 AK 70
12. ALIA AMALINA BT.ABD.LATIF 5 AK 70
FORM 4.
1. SITI AISHAH BT.KASIM 4 IS 93
2. AYUNI AMALINA BT.RAHMAD 4 IS 92
3. NURUL ATIQAH BT.HAZARAIMI 4 AK 91
4. NURUL HANIS BT.SAMSUDIN 4 AK 86
5. AMANINA SYARAH BT.ABDULLAH 4 AR 85
6. NADIA AMIRAH BT.ZAKARIA 4 AK 81
7. FAIZNUR ASHIKIN BT.KHAIRUL 4 IS 79
8. NUR DAHLIA BT.ISMAIL 4 IS 79
9. NOOR ELLYYU HAFIZAH BT.M.ZAHAISH 4 AK 78
Tahniah!! Keep up the good work. Panitia Fizik mendoakan semua pelajar Fizik SMKASR memperolehi A+ INSALLAH
1. NUR FATIN NADHIRAH BT.SULAIMAN 5 AK 82
2. FAIRUZ SHAFIQAH BT. ABDULLAH 5 AK 73
3. SITI UMMIRA BT.MD.SAID 5 AK 73
4. NUR AIN BT.ZAFRUDIN 5 IK 71
5. SYAZWANI BT.MANSOR 5 AK 70
6. NURUL HUDA BT.BORHAN 5 IR 70
7. SYAHIRAH BT.ABD.RAZAK 5 AK 70
8. NURAZZAH BT.AZRAIE 5 AK 70
9. NUR ZAHIRAH BT.ABD.RANI 5 AK 70
10. HUDA SHAMILAH BT.M.NASIR 5 IK 70
11. AISHAH BT.MOHAMED 5 AK 70
12. ALIA AMALINA BT.ABD.LATIF 5 AK 70
FORM 4.
1. SITI AISHAH BT.KASIM 4 IS 93
2. AYUNI AMALINA BT.RAHMAD 4 IS 92
3. NURUL ATIQAH BT.HAZARAIMI 4 AK 91
4. NURUL HANIS BT.SAMSUDIN 4 AK 86
5. AMANINA SYARAH BT.ABDULLAH 4 AR 85
6. NADIA AMIRAH BT.ZAKARIA 4 AK 81
7. FAIZNUR ASHIKIN BT.KHAIRUL 4 IS 79
8. NUR DAHLIA BT.ISMAIL 4 IS 79
9. NOOR ELLYYU HAFIZAH BT.M.ZAHAISH 4 AK 78
Tahniah!! Keep up the good work. Panitia Fizik mendoakan semua pelajar Fizik SMKASR memperolehi A+ INSALLAH
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