1965-04-21 — Page 14

巴意:參加下列各科目考試之考生,

KOD NA

本年度中文中學會考

“六月十五日(星期二):上午八時半

香港區考生

*十時半:薩島(試卷一)。上午十一時器 甲數

下午一時:崴〔二〕

正式時間表公佈

下午一時:乙數(成卷二) [十時爭:乙數〔試卷一)。上午十一時 六月八日(星期二)上午八時半至

五鋯正

五日起舉行 結束 ·專門科自考試則提早在五月廿 正科考試由六月三日開始 至十六日

|下午一時;英文《试卷二)。 十時半:英文八式卷一)。上午十一降至

· 六月九日(星期三),上午八時半至

術(第一、華) 班正中學

筅〔第三部》: 西平:賴物:上午九時至十一時

以上三科之元朗

考生,均在元朗公立中學國考 (一磷至一六〇〇號)培英中学 (一〇一至二八十五號〕金文泰中學

|至下午一時:甲默(其系二)。下時二時至十時中:美術(第一部)上午十一湖·莫斯(第三部)

一下代換上午九時分別在各規定軾寫考,现其缺於下:

〔奇號至一千號)培英中 (查三四融至二八二五號金文泰中學

(1001)13) #KKEN

九龍區送生:

「五〇〇一

【四十二〇一

上午九時至十時半,在安屬太于中察举行

(二八五至五GCC號) 正中華

六八九巴富街官立中學

下午二時至五時,在實情女子中学举行。 結實習:五月廿七日〔湖四) 膳农理論:五月廿八日(星期五):

(二元二至四ICO號 2 培正中學

巴富街官立中學 五OOO號

(四八八號運六八〇七號)培正中學

「五〇〇一碗望六六二三華心東華三院第一中暴

(二)專門科目考試時間: 岜集团綸:五月廿五日(星期二):

六月十日(星期四):上午八時半至

西洋畫:人物:上午九時至十一時兮,上午九時孕至十二時代,在塞師兼校生行

下午一時;化學。 十時半:英文一試卷三)。上午十一時至:培正中學,

阿料門考試時間支分列於後 日止,附於專門科考試,,卡在运

八爷》一九六五年作文中學畢業會 科考保由六月三日開始,月十六 至下午一時半;公民 一世流自此毁行,現將前科名* L同类及谋 | 十一時;國文(誡餘」)。上午十一時半 |至下午一時平;生物

考正式時間表,昨由參育對劉正式公佈, 十一時:國文(試卷二)。上午十一時半 *月四日八期五),上午八時半

六月三日〔凤期四;上午八時半

莖十時半;物理。上午十一夠至下午一時 六月十一日(基期五),上午八時半

實物耨面;上午九時萦十一時半;巴

存學辦事處舉行。 導定該日期及時間,在九雅羅氏大厦音樂 音樂技術:五月廿六日蜜廿八日,

打宇:五月廿九日(星期六〕:上午

十

時牙十二時,在寫屬女子中學舉行。

..

‘巴富铧官立中學 實用美術設計:上午九時至十二時:

至 十時半:地图。 六月十二日(星期六):上午八時半

八甲]科考試時間

六月五日八星期六上午八時半至

-時中;甲數(試卷一),上午十一時 六月十四日(星期一)上午八時半 超

有女校。 中科醫法:上午九皰至十一時:金文。」午九時至十時率,在寶覺女子中学畢行 利距工學校舉行。(张) 中國畫:花卉:上午九時至十一時:一九時半至十二時半,在寶薨女子中學行 辞农散計:五月廿七日(星期四): 上午九時凖至十二羚伞,在灣仔祓救多 簿記:五月廿六日(星期三):上

機械:五月廿八日(期五)

重 工樂學校學行。 午九時半至十二時半,在灣仔活道維多利 幾何重點!五月廿七日(星期四)上

其二第四第

日十二月三年巳乙麽

WAH KIUYAT PO

一九六五年度

英文中学会考試題預習專

物理科

(二十)

陸永熾 。

1, Solution

(9) Lines of magnetic force are imaginary lines traced by an

isolated N-pold placed in a magnetic field. (A space around

● magnet in which its influence is felt is called the field of the magnet).

Lines of force have the following properties:

(1)

The north pole of a compass placed at any part of a

magnetic field will point in the direction of the line of,

force that passes through its location.

(2) Lines of force never, cross each other.

(3) Lines of force form closed curves.

They leave the north pole of the magnet, enter the south pole, and complete their/ path through the magnet.

(ム) The concentration of the lines of force at any part of.

a magnetic field determines the strength of the field at that paint.

(5) Lines of forte tend to contract, and thus to shorten their paths.

(6) Lings of force repel each other, and thus tend to spread farther and farther apart as they leave the north pole of a,“ magnet,

Plotting of magnetic fields (1) Platting-compass method.

The magnet whose field is to be plotted is placed or a 1 sheet of paper and its position outlined in pencil, À plot-~ ting compass, is brought up close to the N-pole of the magnet. When the needle has become stationary, the pastion of ite N. and S. poles are marked by pencildots. The compass is chey, moved so that its S. pole is over the dot which located the W. pole in the previous position.

cale of the needle is then marked.

The new position of the N.

This process is continued,,

and a series of dots obtained are joined to represent a line

Other lines are plotted in the same way and the f force.

ield is completed..

Platting

e

N

11) By the iron-filings method.

The magnet whose field is to be studied is arranged beneath

1

a sheet of stiff while paper. Iron-filings are then sprinkled evenly over the paper. They are magnetized by induction. Op tapping the paper gently the filings will form a pattern indicating the lines of force

The first method is slow but gives the direction of continuou

It is apt to be inaccurate in regiona lines and a permanent record. where lines of force change direction rapidly. Neutral points can be located with some accuracy, and the method is only suitable for weak

The second: method is quicker but does not show individual flines or directions. It gives a permanent record only if special

papers (wax paper spinkled with filings and then meltað er autogr (phic paper) are used, and the neatral poti location is doubt fül Imhis method is only for strong filed, ny

康

|升中指南 | 英文科教材 算術科第六冊課

【播出時間

第十二章統計圖浪.

第二台:四月廿一日下午五時半至六時 北第一台:四月廿四日上午八時半至九時

教案作佛上新理事以期出生人載或死亡人數,每年)

社會的事鞣注释器團象加以紫薪的整理,作滿一種濾,

宏乾针好蝎果,按其性货的後一種表,使滨者便筑畦 想过敦,传墜淡群功

但是,就討役期記校的数字,荫酒更泪甜歌德学,姐

假少下需薅果农比上年不出學畢業人數的就計我,

11960 1961 | 1962 | 1963 | 1964 |];

花 1100 111

(4) (4) 1963 196*******

100人一名小人 6人

b)綠箭人數最多是1964年(共有111人學D 好五年來平均每年學人數是。

($4+1 4+16 +100+11)+5 ***** 436÷5

姆 (2)瓦圖為薪人大平時收八叉出銳計圖,舒鐦閩讜

餐,就能穿下刻管類。

100

月

十二月的收八最多(共收酬00

* XXX 9000)**

200

磁

2%

64 7 ;) KA 朋

* 143 228

(420L-350F)1 (450K-540K)+(450X-PQ +(470-470)

客是多少。才群于我計算。

第十三章稱易薄記

連結美記兼馆人,製作、商打、工廠後政有罪閎野

.

(C) 控制的白衣人相克出是相同的(收八和丸,

出耀是$20元)

厰的道改情况筹练,其在以上装雳纪,肉系滑鼠片琴

(d) 十一月份的收八将克奥相機,很露。

460-700-2601

NO. 2001

文成天有財版化

5. 303素行購箱都

手人:xxx

(C).顆風牌行業的

名單備金飄拆搭總價

(b) 浆華怎7在定野攝

(算) (4) 攝氏表 20碗煎華箕表確度。

.

145下爾是某人1963年每日收交圈,试蚪穿系列费

獎。1964年成升入季就就男)

O PUT

202.550 A 50x80%-100 10

3- 90% (M)

THE LOR+£5%÷8+]

(d) 標價量:2x15x40%-275

感

LONGYAR

IXSIENEUTRAL

(c)~The magnetic meridian at any place is a vertical" plans containing: the: magnetic axis of a freely suscended_magnet atIrestl under the action of the earth_field./

JThe angle of dip or the inalination is defined as the angl between the total intensity of the earth's magnetic, ffold and the horizontal /

The magnetic declination or angle of declination is the} fangle between the magnetic and geographic meridians.

(d);"When an unmagnetized magnetic bar la held nei a magnety: the south, poles of its tiny molecular magnets are attracted by the north pole of the magnet: Many of them turn toward thos pole. This arrangement of molecules results in the formation of a south pole at the end of the bar nearest to the north pole 1 of the magnet. When the bar is removed from the vicinity of the magnet, the orderly arrangement of its molecules is soon, destroyed, and its loses its magnetiam

(11) 4p an ordinary magnet, only some of the molecular magnets are arranged in such a way that their north poles face one and of the bar. As more of the molecules are turned into. this game position, the magnet becomes stronger. When all of the molecules are arranged with their north poles facing the/ same end of the bar, the magnet attains its greatest posible, strength ans is then saturated.

(111) me orderly way of arrangement of molecular magnets in a magnet is little affeted even if the magnet is broken into several pieces. Each broken piece of magnet exposes the ends of molecules all pointing in the same direction, molecular 9 pojenj on one side and N poles on the other making each of them independantly a small bar magriet.

arrows

Two-way telephenazċircuit)

A simple telephone system consists of two transmatters,"

two receivers two batteries, and two induction coils. The induction coils are used to raise the voltage af_the_current In the main transmission lines.

Wha Awananitters funètion to enango'

magnet, line af forer

current,

sound energy

ent forces developed

represen

(b) A strip of soft Iron and a strip of steel of the same dimensions both initially unmangetised, are placed side by side in contact: with a pole of a magnot. Both strips become magnetised by: Induction, and on dipping their free ends into iron filings it is noticed that slightly more cling to the tron than to the steal.d This shows that the induced magnetism in the iron is slightly greater than that: in the ated) imen both: are subjected to the same magnetising force m

If both strips are held firmly in the fingers while the magnēti) Els removed it is noticed the practically all the filings fall

This showa from the iron, while few, if any, fall from the steel that the magnetism induced in the steel is permanent:

steel}

steel

The experiment shows that steel is suitable for making rpermanent magnet as it can retain the fagnetism permanently

once it is magnetised, while soft iron is employed for forming: an electromagnet as it is flexible: easily magnetised and: demagnetigud.,

Recei

Microphone

(speaking)

mechanical energy

electric energy

(diaphragm vibrating) (electro-magnetic)

\effect)

iThe : Induction colle raise the voltage

fine receivers tunction to change. electric energy

electro-magnetic

effect)

mechanical energy sourd energy (diaphragm vibrating) (air-particles.

disturbed)

The Telephone system transmits electrical energy, not sound.

Questions (21) J

D5(a)MWhat is meant by electrostatic induction?

Given two equal metal spheres on insulating supports, an ebonite rod;and a piece of fur; describe and explain how you would's (a) charge a sphere negativaly by induction; (b) charge one sphere positively and the other negatively to the game extante.

Describe an electrophorus and show now a positIVE SHREKO) can be obtained from it.

An insulated brass sphere is given a positive onarge £100 an electrophorus. What happens if it is then brought into contact with (a) the outside, (b) the inside, of an insulated hollow conductor? How would you demonstrate the truth.ce your answers?

Col Name two advantages which & lead accumulator has over a

Laclanche cell

State the components of a fully charged lead accumulator and the changes which occur as a result of discharge. Dive, with reasons, three precautions which should be taken to maintain the efficiency of such an accumulator

What is meant by the e.m.f, of a cellry State Ohm's law and define resistance. Dorive an expression for the resistance of two sandugtors) connected: (a) in series; (b) in parallel.

What values of resistance could you obtain 11 you were aupplied with threw colla each of read atance 1 ohm ? A battery consisting of 6 cells, each of e.m.f. 2.0 volts and internal resistance 0.1 ohma, is connected to a 9-ohm coll. Find the current in the coil. If now a 6-ohm coil if connected in parallel with the one of 9 ohma, find the new value of the current in the latter.

What would be the reading of a high-resistance VOLCANINE, connected to the terminals of the battery, in sach of the above circuits?/