教育儺港
其二弟強六第
日三十月三年申戊磨夏
WAH KIU YAT PO
12
44 x 4.60
.19 2520 cal
~ Cal.
****
0468英文中學會考試題預習專欄
物理科 (國)
·陸永熾·
ape. Heat given out is 2520 cal
(11) Let the resistance be ɛ ɑnmA V
1.2.4
R 1.J
MR
45. 50 #13 on
10.
B LIR
• 110 - 10R
110
Ans. The resistance: 1a. 310 ohma
(111) Jince fa
日十月四年八六九一滕公年七十五□民高中
%$#$%$#$%$#$#3#%$%$#$#%$#%$ $%$#$%$##%$#%$#$%3 #53 4255 75648 $#$%$#$43 #%$%$#3#%$
19$#
敎橋
$#$%$#$%$#8%%%%%$#$%$#$%$
#$%&#$%$#$%$$%$#$%#ESI
#$%$# 5%-S#5% #$%$#$%$#T%$#$%$#$%$# $%$# 5%$# 8%$##$%$#8%%$#$%$#L
(1988
式題額習等酒
英文科 (廿四 )
*何玉柱•
#bara B 15 the resistance
Lis the length
is the resistivit
A is the ares
XX 19
Answers to Exercise XX:
11 x 20 x 0.10 x 10-2
0.110 x 10-3
1.
there are twenty-four classrooms.
is only an adverb, it cannot have anything.
there as 3 put
farmal subject.
In fact, the sentenca
("thereum
ft 18
- 200
2.
The magrièticfields developed by the se current carrying conductora are sa shown. The resultant field contributes a repulsive force on one another.
(b) The electric cell consists of two solenoids
would in opposite directions on a horse-shoe soft iron core. One end of the wêring is connected to a terminal (T1), and the other end to bracket (B) which holds a spring- mounted soft-iron armature (A). The
armature also carries a light spring (#) with
• copper contset touching an adjustable screw (C). From this screw, a lead carries out to another terminal (T2).
T1 T2 are the terminals to which battery or transformer is connected. “
ន
KY! Norcing KILA MTU
G1 gong
A: armature
8: spring
CY SMILE«Ü'and servi
Loviinala
} bendiest
T
HONG
When we switch la closet (prasa button generally), current pasasa sa shown, angrevising the horse-shoe dore. The armature is attracted with contact C broken: The circuit is consequently) open and demgrétise the core. The spring withdraws the frusture back to its original position. The fontset is made again. This is 40%, called a maice-ånd-break device. Vibration of the hammer attjéhes on the arms ture- strikes the goog repeatedly as long as the switch is on.
[a] Internal resistanum - 7 ohms Effective resistance of bell
• R chin.
Total e... • 3 volta
Current papaing • k ano.,
82 12
£ (8 −2) ► }
2. = 10
2
BELL
ano. Effective resistance of the bell is 10 ohms,
Total 6.mf, » 1.5 volta.
Internal resistance
ohm.
Current pissing * **. 1(10
I amp-
1.5
T
$1
amit
ans. Only
BELL
aup. of current Ta taken by the belly
kh (m) (1) According to Faradayə Law of Ginetro
sagnetic induction, the varying magnetic fisio set up by the 'coil A. Links with coil B. This change in fler Linkage wilk induas an alternating e.tf. in B.
(11) The bower output of a transformer 18 usually less than the bower, input because theke Are R Losses in both coils, hysteresis and 12 heating in the core,
Z
(b) (1) Enerky dissinated per daa%I»
Joules 12 plats la Joule r Energy dissfoster per min. • 44\/Rck x 60 ̧
Joules Beat disaloslao per
Ans, The length is 200 gm.
Questions for sert. waakz
47. (a) State Lenz's law
(b) The ands of a solencio are commented together
by a wire. Give diagrams showing the direction of the current (if any) induced in the solenoid when the N pole of a žagnét is (1) thrust into the solenoid, (ii) at rest in the solenoid, (111) rapidly withdrawn).
(a) A transformer bas two secondaries, each of
which is used to light a 6-volt 12-watt bulb. (1) How would you use this transformer to
light one 12-volt 24 watt bulb?
(11) In an attempt to light the 12-volt bulb, a boy joined the transformer coil, would as in following figure, in the manner Shown. The bulb did not Light at all, Why not?
bv.
12 V..
bulb
(111) What connection should have been made
in this case?
Lex[{a}}^ current of 0.3
zamana, certain, maini brightnes8,
KONG
[Br
MAINS
220 volts)
Phirea to lighti
še propor
3.
4,
6.
7.
16 "Twenty-four classrooms are there.") Either: He is very clever and kind.. Or: He is a very clever and kind box. can only be put before nouns
are both adjectives.)
Every student 18 nappy....
(Articles
"clever" and "kind"
("every" is follow-
ed by singular nouns, therefore takes singular verb. Every two days, here "two days" 18 considered a per- iod of time.)
Tom, who is my friend, is very lazy, ("who" is used as the subject of "16",
Whom is in'
objective case. The subject of "ia lazy" is "Tom" which is a singular noun, therefore "are" cannot be used.)
English 18
of my favorite subjects. (One of the many, therefore after one of, a plural noun is needed) who
опе
Either: The man specializes in something is called a specialist.
ta 627
14
Or: We call the man who specializes in something & specialist, (The real subject 15 "pan", it takes
Remember not
"We call it singular varb. I.".
but "We call it %."!? My friend is kind-hearted, brave and hard working. (I have hanged the noun into adjective, and you often aisuse hard for hard:working.)
Or;
My friend has a kind heart and is orave hard working.)
扫
ang)
8. "Student" is a naze given to person who studies;
an adjective,
Q.
("given" is a past participle used as
not a verb, therefore no relative prouous is needed
It is easy for him to do that exercise
(We cannot say a man is easy, but the thing is easy. for the person to do.}
He does that exercise with ease.]{"with ease" eans easily.)
This is the same shirt which I wore yesterday, which" bas already taken the place of "short". there is no need to repeat it with "it"
("interesting" 11. We are very interested in music.
means "causing interest" while "interested" means; "having interest".]
12. The boys make fun with the girls.
cause as
13. I will do it as well as I can. (Or: as well do one can, be- possible. But never as possible as
AD обе сад.) as possiblezas ..... Age never comes to school an time but alwaya gosan home early (Studenta often neglect keeping the verb which far from the subject in agreement sit "home" here is idiomatically used as ab ad- erb, therefore no preposition is needed before ing
Students do not go to school on Sundays. Many students like to use verb "to be" even wann, it is not needed. "on" is used when_**_refer_to apecific daye or dates.)
15.
Tou must do your exercises again,“deceqae you' aught got to have made them dirty. ("must" is fol lowed by bare infinitive--infinitive without "to", while "ought" is followed by infinitive with "to") 17. He must give up smoking. (Many students forget that "give" is only an infinitive, not a verb.) 18. Students atop talking as soon as the teacher enzy
Aars, the classroom. ("stop" followed by infinitivə Geans "stop one action and begin the action shown by the infinitivo", Therefore the phrase means dé- gia to talk. "enter" must agree in person,and-num- bar with the subject--teacher. "enter into" meana begin, especially a donversation, relationship, etc.) 19. We often ask our teacher to tall us a story.
(Tell story, truth, lie, etc, and say 盛 prayer. word, etc.)
HC LIBRA
(1) GfvenTMtne main
!rated 220 votlê
tas
jat, a bulb]
Draw a circuit diagram showing how you would connect these items in order to
the measure the current and to light bulb correctly."
(ii) Give a tin cah large enough for the bulb to go into (and a water proof connection to the bulb) water; a measuring cylinder, and a thermometer, how would you find the power in watts consumed by the bulb when the current is 0.5 amp, without using a voltmeter?
M
□ 3kg
་
In the above H is a small electric motor that runs on a 6-volt supply, B is a 8-volt battery, it is a rheostat, A 18 an ammeter and V is a voltmeter.
(1) Draw a circuit diagram including the
`ammeter to measure the current when the
p.d, across the motor is 6 volts. (11) How would you ensure that the pad. acine the motor is 6 volts? (111), A 3-kg load is attached to the axle of the motor and can be raised as the motor
turns. How would you find the joules of electrical energy supplied to the motor during the time the load is raised 1 meter? What other measuring instrumentidö you require besidan á voltmeter, an amme ter and a metrametžok?
20. My mother asked me to buy some rice for her,
("call" means address in A loud voice. After "ask"} 那些 must use infinitive with"to".)
21. This bouse la built of stone. ("by agent "or")
material/)
28. His frieng miskER KONG HON JA Á BREGRADE WOO
sent to Japan last week. (Make sure that you give, éach verb a subject.)
23. Although he was poor, no oiten helped others.
(Either one ts enough, if you use both, there la no: principal clause; both introduced by aubordinate conjunctions are aubordinate clause 8,)
جاع
Again, "what
He asked me whether or father was at nome or not (After "He asked me. à noun clause should be used, it is a subordinate clause, nor a quaation any more,z 25. I could never understand what he gas talking about.
("understand" ia 'an infinitive without "to" after "could".
about" is a noun clause, with subject coming first, verb following." 26. This exerçise is so difficult that 42 ope can do
it. ("80.... that" expresses a result.) Or: This exercise is too difficult for anyone to do. ("too ... to" means "so
that no.... }
A
а
27. It was the time when everybody gas expected to meet.
("was expected" because it is in passive voice, past participle is needed after verb "be"; "then" is omitted because the adjectival clause "when has already expressed the idea.)
28. Wolves gra like dogs; they are from the same ori-
g10
29. Many or us are fond of swimming,
Or: Many of us like swimming
("be "like"-"look like"; "have similar appearancar "Mike"="be fond of"; "love" These two expressions are often confused by most students.)
150.
you
Don't be afraid that you cannot, BSİLEN don't lose the way, you will get there. ("afraid" la sa adjective, not a verb, cuerotere a "be" is needed. Cannot is often spelt es ERO worde but they should be spelt together as one. "there" is ao adverb, therefofe no preposition is needed. "lose" is the present form, 'lost--peat and past para ticiple; loma ve th noun. These" are also COMMON. SLEtakes.)
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