Category Archives: 2022

2022, Worked Examples

Charge moving through magnetic and electric fields

The magnitude of the force created by the electric field is given by

FE = Eq

FE = EQ (using the values in this question)

The magnitude of the force created by the magnetic field is given by

FM = Bqv

FM = BQv (using the values in this question)

 

Q could be +ve or -ve.

If Q is +ve, then:

    • the electric field will exert a downward force on Q
    • the magnetic field will exert an upwards force on Q (from Fleming’s Left Hand Rule)

This could still create the motion indicated in the diagram, however FM would need to be smaller than FE.

FM < FE

BQv < EQ

v < E/Q

If Q is –ve, then:

    • the electric field will exert an upwards force on Q
    • the magnetic field will exert a downwards force on Q (from Fleming’s Left Hand Rule)

This could still create the motion indicated in the diagram, however FM would need to be larger than FE.

FM > FE

BQv > EQ

v > E/Q

Which is answer D

Sec 4 (2022), Sec 4Adv (2022)

Answer Schemes to Practicals

Sec 4 Practicals

PR1 Convex Lenses – Answer Scheme

PR2 Measuring Current & PD – Answer Scheme

PR3 Resistors In Parallel – Answer Scheme

PR4 Current In Filament Lamp – Answer Scheme

PR5 Resistance Wire –Answer Scheme

 

Sec 3 Practicals

PR 1 Measurement of Length – Answer Scheme

PR 2 Pendulum – Answer Scheme

PR 3 Rolling Marble – Answer Scheme

PR 4 Forces in Equilibrium – Answer Scheme

PR 5 Balances of Masses – Answer Scheme

PR 6 Centre of Gravity – Answer Scheme

PR 7 Reflection of Light – Answer Scheme

PR 8 Refraction of Light – Answer Scheme

Sec 4Adv (2022)

SEC 4 EOY ADDITIONAL INFORMATION (ADVANCED PHYSICS)

Advanced Physics will be given a Grade (Pass, Merit or Distinction)

This will be based 50% on TIP & 50% on Advanced Physics Paper 3

 

Paper 3

23 September 2022, (Friday, Week 2)

Duration: 50 mins 14:45 – 15:35

Format: 30 marks or structured questions

Topics covered will include all Advanced Physics Topics from Sec 3 & Sec 4:

– Projectile Motion
– Gravitational Fields
– Circular Motion
– Linear Momentum
– Superposition of Waves
– Electric Fields
– Magnetic Fields
– Atomic & Nuclear Physics

The following will be given:

Sec 4 (2022), Sec 4Adv (2022)

Sec 4 Practical Exam

Dear Sec 4s,

The Physics Practical paper will take place on Monday, Term 4 Week 1 (12 September 2022). 
You will be informed of the allocated shifts and reporting times in due course.
The format of the paper is as follows:

  • 1 long question (20 marks)
  • 1 to 3 short questions (12 marks) and
  • 1 planning question (8 marks)
Total of 40 marks for the paper.

The scope: All Sec 4 and Sec 3 topics

Please remember to bring along your own

  • scientific calculator (with NYGH approved sticker)
  • 30 cm ruler
  • flexible curve rule
  • mathematical set
Borrowing will not be allowed.
You should also have your student pass for the invigilator to verify your attendance.
The entire paper is 1 h 50 min and there is a changeover after 55 minutes. This means you will only have 55 minutes with each set of apparatus. You will not be allowed to revisit the apparatus.

All the best and jiayou!

Your Physics teachers
Sec 4Adv (2022)

DSO National Laboratories Golden Jubilee Tech Showcase

DSO National Laboratories celebrates its Golden Jubilee in 2022.

In celebration of five decades of science and technology research and development to sharpen the edge of Singapore’s defence and national security, we would like to invite you, your students and colleagues to our DSO50 Tech Showcase on 15 August 2022. The Tech Showcase will feature exhibits across six thematic clusters ranging from robotics to space.

We have reserved 6 places for your school. If you require more places, please let us know.

Note: only open to Singapore Citizens.

If interested, let Mr Shone know by by 8 July 2022.

Sec 4Adv (2022)

Arduino Basics

Lesson 1 – Introduction to Arduino – simple outputs

Lesson 2 – Try one of the following 2 options that will get you investigating input and output data to the board:

 

Option 1:

    • ultrasonic sensor (1 lesson)

Use this worksheet

 

Option 2:

    • DHT11  (Assignment 1 – temperature & humidity Sensor)(0.5 lesson)
    • OLED display  (Assignment 2 – displaying a message)(0.5 lesson)

Use this worksheet

 

 

These worksheets and other can be found at Mr Ang Joo Liak’s Site: http://johnlittle.pbworks.com/w/page/142445775/arduino_lessons

Sec 4 (2022), Sec 4Adv (2022)

Extra Questions on Linearisation

 

We are always trying to put the equation in to the form:

y = mx + c

 

 

a) p = mv

p/v = m

p(1/v) = m

m = p(1/v)

So to get a straight line graph we will plot m against 1/v

Gradient will be p.

c = 0
Therefore intercept will be (0,0)

b) T = 2π √(L/g)

T² = 4π² (L/g)

T² = (4π²/g)L

So to get a straight line graph we will plot T² against L

Gradient will be 4π²/g.
Thus g can be found from g = 4π²/(gradient)

c = 0
Therefore intercept will be (0,0)

c) s = ½at²

s = ½at²

So to get a straight line graph we will plot s against t²

Gradient will be ½a
Thus a can be found from a = 2 × (gradient)

c = 0

d) n = (sin i) / (sin r)

(sin r)n = (sin i)

(sin i) = n(sin r)

So to get a straight line graph we will plot (sin i) against (sin r).

Gradient will be n.

c = 0
Therefore intercept will be (0,0).

e) 1/ƒ = 1/u + 1/v

(1/u) = (–1)(1/v) + (1/ƒ)

(1/u) = (–1)(1/v) + (1/ƒ)

So to get a straight line graph we will plot 1/u against 1/v

Gradient will be -1.

c = (1/ƒ)
Thus intercept will be (0,(1/ƒ))

ƒ can be found from ƒ = 1/(gradient)

 

Sec 4 (2022), Sec 4Adv (2022)

Sec 4 Mid-Year Physics Exam

Dear students,

Please note that the Sec 4 Mid-Year Examination for Physics will take place on 1 July 2022, Friday.

The following topics will be tested:

1) Kinematics (Sec 3 topic)

2) Dynamics (Sec 3 topic)

3) Pressure

4) Electromagnetic Spectrum

5) General Wave Properties

6) Sound

7) Static Electricity

8) Current of Electricity

9) D.C Circuits

The format of the paper will be:

Paper 1 – Multiple Choice Questions
(45 minutes; 30 marks)

Paper 2 – Structured Questions
(1 hour 15 minutes; 50 marks)
· Section A (40 marks) – Short structured questions
· Section B (10 marks) – Long structured question

Total marks for Paper 1 and Paper 2 is 80 marks.

The use of calculator and mathematical set during the exam is allowed.

All the best for the MYE preparation.

Sec 4 (2022), Sec 4Adv (2022)

Answers to Practical PR3

MarkSchemeS4P03_updated

Common Mistakes made were:

  • forgetting units in table headings

 

Graph

  • not labelling axes correctly (with units)
  • poor scales
  • not differentiating the two types of points
  • poor best fit curve
  • working for gradient not shown on the graph (large triangle and coordinates of end-points stated)

 

Three common shapes of graph are:

Your description of the graph m
ust allow the reader to differentiate which one you are referring to.

A increases as B increases.

C is directly proportional to D

E is linearly related to F.

Reminder:

Gradient = Δy/Δx

Resistance = y/x     i.e  R=V/I

y/x ≠ Δy/Δx (except for a straight line passing through (0,0).)

Sec 4 (2022), Sec 4Adv (2022)

PHYSICS WA1 – Tuesday, 15 February

Some details for your Physics WA 1:

Date: 15 Feb (Tuesday)

Format: Written Test (10 MCQ, 20 Mark Structured; Total = 30 marks)

Duration: 45 minutes

Topics:

  • Dynamics
  • Work, Energy and Power
  • Pressure

Do note that you will be allowed to bring a calculator and a handwritten summary (optional).

Specifications for the summary:

  • A4 size (only write on 1 side)
  • Handwritten (not printed)
  • Must be stapled to the test paper and submitted with the test

Revision questions for Work, Energy & Power and Pressure will be uploaded on Google Classroom for your practice, do keep a look out for them.

 

Sec 4Adv (2022)

C. B. Paul Science Quiz 2022

Dear student,

This email is an invitation for you to participate in the above-mentioned Science Quiz on 16 Feb 2022.

Here is some important information to take note of:

1. Trial run is on 10 Feb 2022. Actual Quiz and Ceremony is on 16 Feb 2022.

2. For Sec 4s, you need to form a group of 4 students in order to participate. If you are interested in participating, please fill in this form by 13 Jan 2359. Any late registration will not be entertained.

3. Each school can only send in a maximum of 5 teams, so if more than 5 teams register, I will do a selection based on your 2021 Sec 3 results and inform the selected participants.

4. Registration fee is SGD $140 per team of 4, of which Nanyang Girls’ High School will co-pay 50% of it. The selected participants will need to pass the remaining registration fee ($70 per team of 4) to me (information to be sent in a separate email).

5. I have attached the information sheet, syllabus, and sample questions for the competition. Please view only the information for Category 2.

Please do not hesitate to reply to me if you have any questions.

Thank you.

Ong Wei Jian (Mr Ong) 王伟健

See email from ong_wei_jian@nygh.edu.sg (4 Jan at 9:00am) for more details

Sec 4 (2022), Sec 4Adv (2022)

YDSP 2022

Dear Sec 4 students,

Invitation to Participate in the Young Defence Scientists Programme (YDSP) World of Science (WOS) Modules 2022

The YDSP WOS 2022 is now open for student applications.

There are 7 exciting WOS enrichment modules this year! The modules are specially designed for IP4 to IP5/JC1 students. To help you and your students better understand the modules, please refer to the attached file ‘YDSP WOS 2022 Module Synopsis’ for more details.

In view of the current COVID-19 situation and the safe management measures in place, the modules will be conducted via physical and/or virtual sessions. DSTA will continue to monitor the COVID-19 situation. If necessary, all modules will be conducted via virtual platforms. The final arrangement will be confirmed with the shortlisted students nearer the date.

A Certificate of Participation will be given to students who achieve 100% attendance for the modules. Please note that students may select up to three modules according to their preference. If selected, they will only attend ONE module.

Please take note of the dates of each module and ONLY apply if you are able to fully commit to the stated dates. In the event that you are selected for the module but decide to withdraw from the module due to any reason or fail to attend all the sessions, it may adversely affect future scholarship or programme application with DSTA.

Please also note that WOS 2022 is only open to Singaporeans.

Please click on this link to submit your application by 21 Jan 2022.

(Original post is from ang_wee_ling@nygh.edu.sg 13:22 on 10 January)

More info can be found here: YDSP WOS 2022 Module Synopsis

Sec 4 (2022)

Welcome to Sec 4!

A few reminders:

Google Classroom is the same as that used last year (code:ggzzicg). It will have updated soft-copy notes, level-wide announcements, etc.

My website is at physics.shone.sg (bookmark it!)