2013 DSE Phy Paper 1A MC ans

2013 DSE Phy Paper 1A MC ans

1) BBCDA
6) DADDD
11) BADAB
16) BADCC
21) ACADC
26) CCCDB
31) ACBAB
36) B

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1(a) 1.071x10^8
(b) 6.61hr
c) Rate of heat transfer decreases as temperature difference decreases with time. (6m)
2(a) 74mm 溫度計果條. (6m)
b)-268℃ absolute zero
3(a) 16000 4000 26000 電動機果題. (7m)
4. F=BQV 1.92X10^-14. (8m)
 b) v=BQr/m. as r halved, v halved
5. 程差果題 : 1.5X10^10 HZ 同1.27M. (9m)
6. 實驗題 height正比stopping distance (5m)
7. bungee jump
b)PE to KE to Elastic PE
c) i increase impact time reduce net force ii increase area reduce pressure P=F/A(9m)
8.lens
 a) virtual
b)convex as virtual erect magnify
c) f=16.67
 d) application magnifying glass. (11m)
9. 7554 YR yup (6m)
10. 7.2V 16度
 a) replace with higher resistance voltmeter. (10m)
11. 10.1 度 同 558V?
 c) decrease (7m)
卷二 天文同energy
天文 係咪有個半徑唔洗用?
energy mc 如下 A B C D B ? A C 30 LM 同 1400幾銀錢 ??
利申 亂做 求2MC 19/36利申 mc 32/36 lq ~ 74/84 p2e2 e3 ~32/40 有冇5*

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