1972-03-01 — Page 23

PENCE LIBRAR

CITY

青法国徽頁三第張六第日六十月正年子壬歷

新橋

उ

1972英文中學會考試題預習專欄

堅道英文懋院主編

DE

物理科

(十八)

Physion (10

(31)(a) Let the resistance of each Jampa

be 1 ohms and y chas respectively

When the lamps are connected in Beries they have a resistance of 600 ohms

-600

Why the lampe are in paɔ resistance of 96 ohms.

-(1).

By (1) 600 -

96 × 600

42

600 x 600 4 96 600

600(600-384)

600 x 216

√500 x 21

± 360

fom (1) and (2)

480 or 120

120 or 400

resistance of the lamps ars.

180 ohms and 120 homs

40 + 11r

2(10 + x)

報日僑華

10 9

9116

1.111

112

Current in the shunt (1 ohm coil)

10

10 +

10 + 112

But ourrent

高

10

-115.

厌

ㄓ品

Solving, E2

OB

20

The resistance of the battery is 1.11. ohms and the E.K.F. of the battery is 2 volts.

2)(a) The resistivity of a substance

15

is defined as the resistance 01-

specimen of the substance one unit in length and of -sectional cares,

9

To measure a maximum currens or

jammeter must be ahun TER so that 5 ampa, pauses through Ammeter and 10 amps, the shunt. For that came, voltage MOZONE

- 5 = 0.1 0.5 volt.

Resistance of shunt

0.05 ohmi

10

Cross-sectional area of wire (A).

0.031

0.031.

the

red length of wire

where is the resistivity

1.3 x 10-5

0.031

10 ohms

10 ohms

1.3.x

F16. (1)

29.04 cm.

Pig.(2)

For Fig. (1

For Fig.(2)

Equivalent resistance of 10 ohma and

ohms connected in paralle1" - R ̧ ohne

+10

10

Currant in the sain branch

豐

10. +1118

Current in the 10 ohm (001)

1:12

117

112

0.031

π

0.031 0.031

The length of copper wire is 29.04 om

(33)(a) Two batteries, of which the B..

are E. and E2 respectively, an the internal resistances are

and

2 respectively, are connected in parallel so se to send currents in the 8680 dir- ection through an external cirTM cuit of résistance R. Prove

1

that the current I traversing the external circuit is given by the expression.

(b) Apply this to a case an: which the

batteries consist reaprectively of six cells and of four cells, each cell having an E.M.F. of 1.4 volt an internal resistance of 0.5 ohm, and where the external circuit has a resistance of 10 obas. Calculate the current traversing Bach branch of the network.

(34) An electric circuit consists or a

battery of.3 celle in series (each of which has an E.X.E. or 2 volts and a resistance of 0.9 ohn), a c01 per sulphate voltameter of 0.5 ohn resistance, and a pair of wires in parallel (one having a resistance of 1 ohm and the other one of 4. ohaw).

State (a) the strength of the currents passing through (1) volt neter, (2) each of the pair of wir

(b) the potential difference at the terminals of the voltameterį.

(o) the electrical energy expenden

per second in the voltameter.

宜,其中貝寧院(B

仁灣發生好些,正式,風熱鬧,

三期星日一月三年二七九一曆公年一十六國民華中

一·源定上該按照任監治

一另行開新概程,延聘 晏家担任,有下列各

加强思愁,醉於下學期

將各家長與校方聚合 作,並收大臀激之效

被表己全盲派出,两

|張,台於榮月北正

高水準,

效合作

·香院榭四日之年假

期學下院書仁樹| 項多程課新開燴

爲美在士博烈鸿胡監校院該

成有路出學升治接生學校:

圖:三個大器入

慈九級分生強方蒙规

中大師薏檢初級

·化協,轉派PUTEIL ( 担任英國文學,出國交

哲學大學,尚之適先生

我李光浦光生活

改,易泳立先生將發性港九新區天台學校聯會

·跟梁史。至於上學期.

各科 奥浏理二四

謝,均照舊授。

、又树仁院校監战

良好印象度濟戲风趣, 杜倫大學等高樂學府之一茶小米想熱,幸無石,飽瑙邦 殺正槳,會賜寧 【 國煞,學生、印礴民,張張華,郝永光

•包獲英國路易士安。 鴻烈博士书英髅季以來記女嚞湖號O·B·R·灣銜郯同灾 聯歡大

州立大學“東北大學出席參加有子鈎,前菜,余永,朱

七時,保平安酒樓的優名譽會長調有願限員榮術 [枣熬油)港九新做天合學糁聯會昨日下午 該會同寅井舉行春聯歡

賀張有興膺勳

中文中學會考試題預習專欄

1972

英文科(十八),一許落芳一

Kodel Answers

ENGLISH (18).

A. 1. No sooner had the Dell rúna than the boys rushed out of doors,

You are not so vALI 88 1.

3. The guest having left the

hall, the host retired to. his bed-room.

It being a fine morning. we went out for a walk.. He need not have come: so early.

He did not need to come.so early.

7. It is necessary for me to

leave now

8. It was very unkind of him

to turn his brother out.

9. Study hard or you will fail

in the examination. 10. Study hard and you WILL

succeed in your attempt.

B.終身在他們出生的地方来工

作的人愈來愈少了,他們有 單獨去本國各地來做工決 有很多人到外國去,在世界 上每個主要城市,都有数 以千計的外國人,其中少 數是遊客

這種理由很多,同時爸 個人的理由也不同,很多受 過高深教育的男女一比從 前更多一受委派代表他們 自己的國家到外國去做 外交官,商務手员,或在殖民 地政府任職,國際貿易 曾經有驚人的發展,同時有 錢的人很想購買其他國 家的特殊產品,在每條大 路上,可以见到美国,英国 意大利和日本的汽車,三 廠裏大部份的機器,都是 由海外製做的,同時個人 的奢侈品也有很大的需要。 由於這種情形,很多男女到 外國去推銷他們商號的 *產品,銀行也成立起來處理

財政上的安排。

有些人到外國去,因為 他們感覺有某種才能應 該-

份利用來為貧乏的 民族謀幸福的,在非洲

亜洲和南美洲,很多教育 的,醫藥的和社會的工作

由一些獻身事業的人交

担任報酬

接受較在本國為低的生活

·港九新區天會學校聯會昨行路 聯大會

方式,這些人大部份都很 努力訓練當地的人,希望 他們能夠繼續這些工作

Exercise 18

Read the following passage and answer the questions which follow

Most people view snares

with alarm, but such a fear 11 largely irrational. The vast wmajority of snakes are

innocuous and often avoid us. Of all the poisonous snakes.. only those which we find in tu sea are a menace. It is partly due to their aggressive nature and partly due to the___* infavourable situation in which a swimmer or a fishermana in water can be taken by surpr

The land snakes are mostly not aggressive and their speed we have usually exaggerated. On a surface Ired from obstacles only a species are capable of catching a:

human being. Even though tne undulations of the body of a snake are very swift, the forward movement itself ia rather slow, so slow that it cannot exceed a brisk walking pace. In a dense jungle or undergrowth, which is often the home of snakes, the

movements of a person can wdwin the snakes to keep away, as

through their bodies they ar

in a position to feel the vibrations of the ground..

Through their experience. snakes have perhaps learned that it is not worthwhile to attack a human being. He can kill the anake and start to seek a remedy, the fatal momen comes to him, before

Snakes are valuable from certain point of view, They can keep the rodent population in check, thus helping the farmers to a great extant.

, For each of the following

find a word of similar

meaning in the passage

(1) unreasonable

(2) not poisonous

(3) apparent danger

(4) likely to attack

(5) carry beyond the truth

(6) hinderances.

a class of things having some common characteristics

(8) gentle rise and fall

shrubs growing among trees

(10) deadly

How does the writer think

of people's fear of snakes? Why are snakes found in the ses are menace to human beings?

Why does the writer say that the speed of maker is often exaggerated?

5. How can snakes get the

warning when human beings are approaching?

Which sentence shows that snakes are helpful to the farmers?

Why are the movementA" OT

snake regarded as

"deceptive"?

8. What is often the home of

Bmakes?

Are all snakes poisonous? :

10. Why is it not worthwhile

for a snake to attack a Human being?