1971-06-10 — Page 18

二要二張五第日八十月五年亥辛麻复 WAH KIU YAT PO

英中會考物理科答案

(續)

SUGESTED AKSNEUE TO TẠNG LONG

EDUCATION STANIKATIO

1971

A

34

1.54)

120 (opp.

$imes 2 - 180 – 60

180 120 1377:34

(11)

in 1'» i sin

1 - 380 44-

The number of complete oscillations made in 1 second

is called the frequency.

The maximum diaplacement of the prong of the fork fren its rest position is called the amplitude of the fork,

3/4-17.5

17.5 2-4/3-

(6) (~).

473

-17-5 cm;

(4)

Since YK zbaolute temperature,

Volscity of air sound at

33180

33100

at g

33180 x

17.5

1896 c.p..

frequency of the wave

(1) When tension being kept constant

for

new frequen

320 374 L 426 HZ

(4)"' FATT

(5) (4) ar

Current

0,66 gm.

320 x

0.00033 gm/ci 2860- 1680 Buc.

[-0.66 0.00033.x 1680

119

1.19 Amperse.

The required precautions aros,

The cathode is thoroughly cleaned with one)

and well washed under the tap,

(2) A suitable current is adjusted by a chaostate to

about 1/40. amp/aq.cu, of cathode surfaos,

(b) (1) Diagram as shown in the figure,

60 Volts D.C.

e.m.f-36 volts

A resistance is needed in order to gat, i sbarging current of about 5 ampere,

(111) Apply ohula law to the whole circuit.

報日僑筆

四期星 日十月六年一七九一堡公布十六國民中

音效军到

Also, apply ohms law to the circuit ABCD.

英中會考歷史科答案(鎮)

ammeter

・Current -18

horizontal component of earth's field

1.53

ohms

internet recivlavice =

wine PC ir vertical

(3

galvanemater

neutral point

force on

Are PQ

sée.

Neutral point will be found as indicated: When the current is decreased slightly, the flux duced by the wire is decreased at the same time, the neutral point will move towards the left hand side wlightly.

(b) (1) Since there is no cutting of magnetic flux,

therefore there is no current pro sed.

flax direction

F

(b) (11) When AB is moved vertically downward; the

will flow as indicated in

(iii) In this case, since the loop.

magnetic flux,

gure

ction

cuts the

By Fleming a right-hand rule, the current flows in direction All Refer to figure (1)

(iv) When AB is moved up, the induced current flows. in the direction BA. When AB is moved down, it flows in the direction AB. When the wire is moved up and down continuously, the induced current changes it'a direction whenever the motion change its direction.

SUGGESTED ANSWERS TO

HONG KONG CERTIFICATE OF EDUCATION EXAMINATION (ENGLISH) 197 HISTORY (Continued)

What problems did Germany face from 1918 to 19337

Defeat in the First World War brought Germany a series problem of heavy reparation payments and indemnities. iteful to pay would mean Allied invasion and a renewed war. But how could Germany pay when her economy had been strained by a full-fledged war? Second, there was the immediate question of national reconstruction. Third, there was political instability to be dealt with. Fourth, there was inflation.DA

When the Allies finally fixed the reparations to be demanded from Germany, in 1921, the Germans were shocked "by the absurdly and impossibly high figure. It was clear

that Germany could not possibly meet the commitments. Then French and Belgian troops occupied the Ruhr basin with its coal and iron industries, in an attempt to enforce payment of reparations, Thereupon Gctuan minert and workers of the Ruhr went on strike, with disastrous results to the economy of Cermany. As a result, the German mark depreciated. Its value fell so steeply that it looked almost ridiculous. The mark fell from its 1921 value of 62 for 1 U4. dollar to 100,000,000 for 1 U.S. dollar in 1923. Mis set in a serious infletion crisis. This infla¬ tion crisis was unprecedented in severity in the history of modern industrial states,

we

............ Than there was the urgent need for Germany's reconstruc.

tion. During the war, Germany's industries had heavily devoted to lije production of war materials. In other words, Germany had stressed too much on the war-industry. Wath the War at an end, the German industrialists found it very

difficult to turn back to other sectors, Industry thus collapsed because the majority of industrialists could not re-adapt to new conditions. Besides industrial res construction, agriculture had to be put right again. In the war, agriculture had stagnated, partly because of Germany's emphasis on the war-industry and partly because of interrupted labour supply for agriculture. Then busi- ness and coerce had to be carried on again. But in- *. flation and ceradale ülalócation had such recovery more tedious. Unswgformzit was another headache and it grew more acute as host of the Corman industries had already closed down. Finally there was reconstruction of the cities to be done. M

Folitical instability mas alaays hanging above the head of every Geracer the war. First, there was the over throw of the Kok-nzollern monarchy, Escord, the succeeding Heimar Repub) o mas never welcome and never strong. Cermans began to fear the prospect of a munist Revolution was so very recent Germans feared social upheaval, and they had enough grounds to believe so. Unemployment, inflation and economic dislocation could the social revolution all the mora casier. The Kapp Putsch (or Kapp rebellion 1920) reninled the Germans of the pieca Lous weakness of the Re- public Government. It was exactly all these fears and pro- pect of problems that made Fitter's rise to power so easy in the last years of the Heimar Republic, kwa d

Although the Weimar Republic could be blamed for its "040 recses and limited achieveme ́s, que must be fair to

at in vicu of the tremendous tasks and problems it had to face."

83. In what ways die Britain oppose, Russian foreign policy in

eastern Europe after 1850? Why did, Angia Russian relations improve in the early years of the twentieth century?

Russian foreign policy in eastern Europe, in the nine- teenth century was guided, by one general principle. – pene- tration, dizmeberment and the destruction of the Turkish Expire, fithin this broad principle, minor details of Rus- sian policy ucre the ambicion to occupy Constantinople and control of the Dardanelles. (Strait of) and mastery of the Mediterranean. Knowing such, Russian ambitions, Britain had to keep a constant watch on Russian movements. Thus the ⠀⠀⠀⠀ British policy with regard to eastern Europe was guided by one broad principle – to check, to forestall and to annul Russia's ambitions. The British motive was simple. The preservation of the Turkish Empire was necessary because Britain could not let Russia threaten the Mediterranean. The Mediterranean, the Suez and the Red Sea were the life line to all British possessions east of the Suez, While conceding to the broad principle of checking Russia, Bri- tain would very often act in concert with another. Power against Russia. It might be France and it might be Austria,

When Russia picked an excuse to fight Turkey in 1853, on the pretext of protecting the Christians subjects of the Sultan, Britain was on full alert. It also happened that the French Emperor Napoleon III was also quarrelling with the Czar on the right of protecting these Christians and the Holy Place, Britain thus joined France în fight- ing against Russia. Dritain of course knew what she her self was doing, She was not fighting without a cause, She fought the Crimean War because the integrity of Jurkey had to be upheld. And territorial integrity of Turkey was in- strumental to the safety of the Mediterranean. By aligning with France and with the victimized Turkey, Britain amassed. greater resources in implementing her policy. She fought

the Crimean War not because she supported the irrelevant French claim. Still lead was she fighting for the love of the Sultan. She was fighting for her strategic interests.

Again when troubles broke out in the Balkans in 1874 Britain kept a strict watch on the Balkans and on anje possible, moves of Russia. In 1874, the Turkish subjects, in Bosnia, Herzegovina, Serbia, Montenegro, and the Bul- gars revolted against Turkish repression. Massacres fol- loved. Russia intervened and declared war on Türkay, Ma- turally Turkey was defeated. Russia forced the Treaty of San Stefano (1878) on Turkey. By such a treaty, Russian, influence could be considerably extended in the Balkans, This Britain was unwilling to see. Again Britain inter- vened promptly. This time Britain was acting in concert with another Power. It was Austria, This British mote, was

IR

5R

24 - 4.8 chan

power lost in the re

*4.8.

120 watts,

(v) Useful power consumed by the accumulator

power output = power wasted

60 x 5 120, 180

VI

36 x 5 180

(a) Since the galvanometer

shows no deflection.

Pod across AB -1.5V-

By E

where I 1.ampi

E1.5V

1.5

B1.5 Stuns a

(11) Refer to the above dia

(lot

The balance point should be 37.5 cm. the meter bridge,

(6) (c)

Let be the length of

n-༩Z-164,』

-

123 cm