百三弟張四教
年慶甲展集
香港英文中學會考試題解答
理
(搞完)
A conduitor at the shape drawn is fidunted on a glass fod ang zharged in a high palenital
Cartucces
Z
Describe a simple experiment to which à "proof plane" and an electrostape are used to demonstrate how the charge will be opzond over the surface of this objeci.
Explain in orb lines how a lightning conductor makes use of the neculum eledirteal ornnernes of a sharp pointed conductor.
The diagram shows a soft iron electro-magher and armature. on suitable diagrams. the direction of the lines al force and N and Spalae whenz
the armature' is moved well away from the magnet,
the armature is fitted into the gap:
Show
ine armature is left in the position shown in the diagram below..
C
which sincity
Explain in 3 or 4 lines) what happens to the molecules in the closed
ronning when the pair of switch arms are moved upwards from their present position to the position shown by the dotted logs.
State: Faraday's Laws of electrolysis.
You are given a suitable adlution of a silver salzand required to use it to electro-plate's brand stayi
Draw a labelled diagram of the apparatus and sireult required. Do not describe the experiment, bor explain any impariant precautions that should be observed to give an even deposit of allver that will not drop off.
in the experiment
above, you are given that the electrochemical equivalent of silver 0.006 g/coulomb and that i current of 4 amp was passed through the solution for 12.5 hou
voltmeter connected from the anode to the cathode gave *
LOF 20 NOELS
Calculator
(0) the mass of silver deposited
MANSFIELD COLLEGE
六翼
、
庭
二,護校
孔教大成中請容鳳燕校
怎樣演説?
日邀詿孔教學院董事,
特》孔大,没话的重要
鱼不如有彼豔性
KIUYAT P
发
更別得有,話感被 李香港人話得有破好您
版
服
德列孔出的中按同也歌,
為愛使要人開括的演的大邦
「上的的,免满
,的女生,剩半者們要
B翎番稿令的,能中間國純子
也够,小家國
比備紫立下午技有二後如為低的能力低,
十二請在本校易投算的,也可以消弭於無形,而
劉明,談吐風生,孟子也說,「宰我于 欣賞,廖氏A群時豪於售,名垂千古。 心動百点生菜精會神經我和于實,但摸
含整 題爲「怎批消烈?),其本我可知, 云云。散熱容演講 第二位,僅次於「雙 話斑典宅可研究。
將悯諾內塔,摘錄如卡罗之師:泰歌時代 熱烈鼓掌中散會,姓三寸之舌,有時張於 一-光都完畢,在全堪一張愛而越。」可知 大 十一時有i钔齊,被吳,
梁文燕官小學生
周舉四十餘人,繼續倒日報,由本
〔傳訊)常立級文劃小學,今年
|參觀華僑日報
不啻上了活動的一課,
各
一問題,本無職員亦分班彝树冠安,告 至技同基求知惹極源,各人提出很多 痍、麗、握鋱版的爭模等, 的過程,怎採訪新聞, 怎质排
(KR)
rsistance of the solution.
the cost of the eletrical energy unno if it was supplied 1
Anomer alectro-plating tank is connected electrically in parallel
with the first, and it is found that the second tank absorba electrical Federgy át a rate of 100 warte,
Calculate the resistance of the second tank, and the total current] now being shared between the two tanks.
Tartume that the ypiimeter reading remains ai 20 voltaji)-
15:10 sftudea that the quantity of charge the proof? plane takes away 18 pragortional to the denessy, of the charge on the part of the surfvce' it touches. In order to demonstrate how the charge 18. spread over the surface of the abject, Tet the proof plane touch one part of the object and carry away a little charge from this part. Then, charge the gen electroscope by the charge on the proof planu, aris observe the divergence of the gold-leave." Earth the plans and the electroscope to remove the) charge, and then touch the remaining parts of the object and charge the electroscope an before Different degrees of divergence on the #lectrosETJE are produced by the charges on different parts of the object, since a bigger charge will produce a bigger divergence. Eence, a comparison can be cade on the distribution of charges on the surface of the object. The figure below iliustralos briefis what, the result would be, the distanes of the dotted iine from the surface of the object representing the, strength of the charge.
when a positively charged chous Loven over the antenna of a lightning conductor, a negative charge is induced on the earthy and: an", the -1dwar mot×2:plate of the lightning conductor. Since the charge is subtly concentrated at the sharp point.
• tory high potential. sa' created at the places and the" segutive, charge taaks away to the upper motal plate, thus neutralising the positive charge of the eluua and preventing a lightning flashy
號
O
Anter
Lightning Conductas
nagasiva
↑ charge
leaking
away
喇沙審
就馬子批“棒 於嚴獨處,宋 非可一不能羽叔奶外家立在剑离能發
在台工條研起磨 交的不大國。婪
強究個的 同地描國是規限,
(d) Originally, 11 the molecular magnets are pointing in
the direction me shown in part (c) above. When the current de reversed by moving the pair of switch aras upwards, sil' the molecular sagneta will turn round- and paint in the opposite direction under the influente) of the opposite elpotromagnetic force
(2) Faraday's Lawn of Electrolysis.
Law - The weight of a substance liborated at an: electrode is proporzional to the quantity of electricity which has passed through the electrolyte,
Zax 2 The weights of elements.liberated by the same: quantity of electricity are proportional to theiz. chemical equivalente,
#ilver Cenody
<eatheday Brass Gay -silver
Precaution - Use a small currant, so that the silver). costing is hard and permanent,
Precaution 2 - The brass tray must be cleaned and dried thoroughly before it ia dinned into the electrom
(C) The mass of silver deposited 001118x4x12,5x60x60 gm,]
1 The resistance or the solution « 20/4 ohme,
Tka oost of strácal energy, 201
201.24, p
(d) Current pasaing through the second tany
Resistance of the second tank - 20/5 ohms.
Total resistance of cho two tank
total, current road,
生聯合
助
30.50)
180/20: amperesi
LANDETEKS
天主教思德望男校
ST. STEPHEN CATHOLIC BOYS SCHOOL KOWLOON
點: 本校由喇沙蓄生聯任名譽校董。書籍與課程均與各天主教男校相 同。校長、副校長及主任均爲早期出身於喇沙之香港大學學士。 F. 1英女由港大學士任教。
招生班級:
考試日期
英文中學 F.1 至 F.4 英文小學P.1至P.6
六月二十八日(假日照常辦公)
九龍塘界限街 118 至 120 號全座( 天主教聖德肋撒教堂附近)
電話:
S ENGLI
聖以諾英文學校暨幼稚園
人士主辦,自置校舍,聘請國內外大學及本港 台之中西經優良教師,採用最新方法教授,課程以中英文為主 佳養 培育兒童良好之品德
校址
招生
青括六六九五八 六號(美就華酒店隔鄰) 龙尖沙咀金巴利道 諾士佛台四號至
建设至下午六時,例假照常。” 報名:件及最近相片强。每日由上午九時 即日開始。 報名時與携带成精炎或超
考试四月二十日上午九時半及下午二時
各班男女新生,九月三日開高 小暴五年級至中華四年級((P.5~FORM 越有各科實核实及標準镍变卅二間,招收英 自建新型校士林高八雇,自動重梯兩座
明年埕辦(CFORM5)英文中高會對班。
格致 書院
校長葉速历 副校長葉若昭
校監
鄭亞清
助革
蘇浙公學
索:
校
* 簡章備索監督:徐季良
址期期
招
清
時伍
香港大學教育系文理學士主辦
DAVID COLLEGE
#大衛≠書院 生
校考報
校長。沈亦珍
真理英文
海僑英文書院招生
中文部:
學生品德之培美
非之經驗 教師任教
上午1
長:沈振兆
RS JSMTH校長、陳
本校另備有校車送學生 招考班級:幼稚團高初級及預備班
英文小學蟹收一至四年級上 下午男女新生
報名日期:即日開始。
(考試日期:六月日一日下午二時。
址:北角馬寶道77至87號(
近北角碼頭10號巴士總站)
校監: 周渭波
易通中學
ETON COLLEGE
招男女生
英文都上午班
班級:P5-
(CF4興5全日上課)和 中文部下午班
八一至中三(會辦會考班) 中英文部即日開始
月27日(星期六)下午二時
K步元洲街231-237號
佳利
Page 15Page 16
下周由現在,不分阚符,均可報名 本月底上云加,可降准典球員 杆制
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