1977-04-07 — Page 27

弄三第張七第日九十月二年巳丁摩穿

WAH KIU YAT PO

報日僑華

1977中學會考試題預習專欄

ECTORS the

The potential difference

Bysten is :

德社主編

VI 1 (R+R)

Hence,

V - 1 volt

100+ Bo

+ 20000

200

1.5(100 + Bo} 300R

物理(廿二)

魯榮家·

10 x 10

- 0,01 amp

amp

IR

PHYSICS (22)

Answera to Exercise 11

1.(a)

As shown in the above figure. if a current is sent through the coil;

Among the four sides of

the coil, AB and CD are per- pendicular to the field. There is no force acting on AD and

BC. AB md CD are acted on by two equal and opposite forces. These two forces for

V

2.5 ohms

-

0.01

2. (a): 1.0 - 2.5x0.01

97.5 ohma

1.2.2

30

Enter ]

V

(Anm.)

It can be shown that if three

resistances By

B2 and R

are connected in parallel,

the equivalent resistance R

is given by

R

couple

"'nd the coil will then rotate

about the axis XY.

-(#) The magnitude of deflect-

ion of the coil is proport ional to the magnitude-of the current flowing through

the coil, the strength of the

magnetic field and the number

of turns of the coil,

(b)(0)

A

As shown in the above figure; in order to use it to measure.

current up to 1.0 ampere, low resistance shunt I must be connected in parallel with the sameter given. **Let the current passing thro-

Lugh the meter be I

and that

R be I

the resistance of

the meter be Ra

is

If a current I - 1,0 amp

sent through the whole system:

then,

Ohn's La

(11)

B2 B3

+

therefore;

41818

48 • 818 + 824

2.Johns.

2 ohms

2 4 4 - 6 ohus

// Red

R

ed

2 x 6

1.5 ohms.

The equivalent reaistance of the external circuit

fb

(b)

1.5+ 1.2

2.7 ohms

Since

(Ane.)

12.

2.10.3

4x 1.5

6 volts

ed

ed.

10 x 10

0.01amp

-2,5 ohms

0,01 x 2.5. 1.0 - 0.01

2.525 x 10-2

- I amp Therefore, the reading of the ammeter is 1 amp (Ana.)

(c) The reading of the volt-

meter is

i

1 x 4

= volta

3(a) When R, and R2 are in

parallel:

(Ans.)

65V

(Ans.)

1.5(100 + B2), 100ks 30082 +20000

100+R2

1. g

3RD

200

1.582

100(3R2

.(1)

+ 200)

If an additional resistance

of 50 ohms should be inserted

when R2 is disconnected ;

1000

1.SV

$200.0

四期星

日七月四年七七九一圈公年六十六國民童中

Ecan. Keep quiet! The baby

(A. are sleeping B. is

sleeping C. slept D. sleeps E. will sleep.

(B)

1. Will you come with us?"

(A. "Am 17a B. "Never mind."

C. "Yes, will you?" D. "Very bad."

1:(0)

2. B. "No, Not I.")

John Che D.

are you going

"I said.

B. ?

C.

2.(

3. I could see Hong Kong

the top of the big wheel. (A. of B. ∙ia C. to

D. between E. from) 3() 4. "Let's join the for the

ronad: about”.

(A. habour B. test D. trip E. ferry)

5. Ken has a bird

a song.

(a where B. whom D. who E. which)

6. The pupil

very lazy.

C. queue 4.1

can sing

C. who se

5.()

you punished is

(A, who B. whom C. whose D;

which

E. why)

I don't know that lady.

is she?

6.0)

(A. Where B. Which C. Whom

D. Whose E. Who) 7.0)

50.0

As shown in the above figure;

10050

15

200

350

(2):

8. Tom

to shout. (A. raise 3. rise C. rose

D. raised E. risen) 9. The teacher asked Ton

(A. which question is the

his voice and started

8. (

easiest.

(1)

(2)

B. which is the easiest

question.

1.58

100(3R12+ 200)

By - 400 ohms. (Ans.)

the potential

(b)(i) Let

differ

source

of the electric-

The electric energy

needed to boil the water by A

x 10 units

The electric energy needed to boil the

water by B

x 20 units

H

2RA

(1)

When the resistors are con-

nected in series

the equivalent resistance - BA+ R

3BA

fott mins are required to

boil the water.

(11)

x 10

t = 30 mins. (Anş.)

the resistors are

A in parallel;

equivalent resistancé

R.R

AB

+

Let the time required to

boil the water br t

Q

t

10

20

sins.

400 sec, (Ann.)

C. Which question was the

easiest.

D. which question will be the

easiest.

9.()

E. which question has been

the easiest.). 10. The moon is not

earth.

as the

(A. larger B. as large C. largest. D. large E, the largest). 10:0 11. Are you studying in

university, John?

(A. any B. an C. some.

D. a E. X)

11.(

12. I my new car in the

garage last night.

(A. Inak B. has locked.

C. locked D. small lock E. am locking)

12.0

13. These three men are thieves

Jim said softly

14.

B. 2 AAC E7) 13.0

for the doctor at once if you are ill.

(A. Ask B. Send C. Look

D. So E. Invite) 14. ( 15. Neither of the pupils

dictionary.

(A. have 8. "bas C. ie

D. are E. having) 15() 16. We should

the road care- fully.

(A walk across. B. crossed G. crossing - Di walk cross E. across)

16. (*): 17. They write those words:

(A. in pen B. with lank

C. in ink D. by ink E. in paper)

17.) down.

18. Come back or you',

(A. will fall B. are falling C. fell D. fall E. falls)

18.()

Read the following letter and the two passages carefully. Then an answer questions (19-30).

Dear Susan,

It is my birthday on the coming weekend and I am having a party. I hope that you will be able to come. Try to arrive at our house at about, six o'clock and tell your parents not to wait for you home before tea.

7

One of the presents I shall be receiving is a toy bicycle and my cousin Bar Sara has pronised to bring several of her films along. We should have a good

show.

Please give my regards to your parents.

Yours sincerely,

Mary

19. The letter was written by (A. Susan B. Mary C.

Barbara D. Father E.Mother.

19.()

20. Sasan was Mary's

(4. nephew B. cousin

25. After a short rest, Crusoe

began to feel thirty. He walked

a little way and found a stream,

at which he had a long drink.

But he had no food; and nothing in his pockets but a small kaife, a pipe and some tobacco.

Night was coming on and it began to grow dark. Crusoe had to find a place to sleep, safe from wild animals. He chose a. large tree with spreading branches and climbed into it. With his knife he cut a stick to keep off any animals.

He put some tobacco in his mouth and chewed it to keep away his hunger. Be made himself comfortable among the branches, so that he would not fall. And so he fell asleep.

23. Crusoe got water from a

(A. stream, B. river C. pool D. pipe E. tree)'. 23.0) 24. In order to keep away from

the animals, be

(4, got a knife B. didn't

sleep C. chose a tree D. cheved tobacco E. cut á stick)

25. He fell asleep in a

24.

(A. stream B. cave G, tree

D. stick E. branch) 25.( ) 26. When Cousoe was hungry, he

26.( (A, drank some water

B. ate some food

C. chewed some tobacco.

D. ate some tobacco

E. at some animals)

One never feels dull in the country because there is always something new to see. One Sunday morning, I made up my mind to visit my uncle, who is now living in the country by himself. Two miles from my uncle's farm, I got off the train and walked in the. morning air. It was a cool but sunny day. There was strong wind blowing from the north. It was shivering when I set out but the Exerci se soon made me warm,

27. There is

to see in the

country. (A. something new B. nothing

C. something old D. some- thing exciting E. something

something dull

27

28, Made up my mind, means

(A. dull B. visited C. felt

D. decided E. walked)

28.(

29. The writer went to visit his

uncle by

30.

(A. van B. tran C. train

D. taxi E. bus). 29.()

made him warm, (A. The strong wind

B. The journey

G. The country

D. The distance

E. The exercise)

30.(0)

Choose the suitable words to complete the following passage.

When I was young, Stephen often

31.

B. te Els

C. tell

D. is telling.

E. Will tell

31(

me to work hard' so as to earn.

A. hia

B. I

52. C. mine

own living without

D. hin

E.

my

32,(

A

wish

B. wished

33. C. wishing any help freshìm.

D. wishes

E. to wish

33.()

A. ago

B. late

That was many years 34. C. after

D. since

E. time

34. (*)

but ever since I have gone on

A. work

B. working

35. 6. eating at my job though.

D. read

E. sitting

35.( ) it isn't necessary for me to work if earning money should be taken as the purpose of life.

shown in the above figure;

1.

in order to to measure voltage up to 1.0 volt, a high resist- ince R must bẹ connected in

eries with the meter.

R-1067

As shown in the above figure,

let the currents through the

1977中學入學試試題預習專欄 愛智慧社主編

cireuit, R. and Ry be i, 41

and is respectively. Hence

i-

1.5

+ R

R2+ Bq

But, R1

- 100 ohms, X = 200

英文科 (廿二)

ENGLISH (22)

Choose the best knæver, Write the LETTER in the brackets.

21. Busan was invited to Mary's ›

party.

21.()

ANSWERS

C. sister D. friend E. niece)

(20%)

(A. debate 8. tea C. show

D. birthday E. dancing)

1.E 2.4 3.E 4.0

5.E

8 B 7.8

9.0 10.B

11.D 12.c 13.D

14.8 15.8

16.4

18.A 19.8 20.D

8.D

22. The girls would have a

at the party'.

21.D

22.(

17.0

22.C 23.A 24.2 25.C

(A. bouse B. present

26.C

C. film show D. toy bicycle E. cousin)

31.A

32. E 33.C 34.A

27.A 28.D 29.C 30.E

35.B