7.ข้อสอบ A-NET วิทยาศาสตร์_ฟิสิกส์ปี 2550

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A-NET 15 () 2550

25 (1 - 25) 4

25

g = 2m/s80.9

c = m/s103 8

h = J.s106.6 34 R = J/K.mol3.8

e = C106.1

19

1 eV = J106.119

f =2

21

0r

qq

4

1

229

0

C/mN1094

1=

g/mole32.012.0,4.0,2..0,OC,He,,H22

e = 2.71828

3.14159=

0.4343elog10 = 0.3012log10 = 0.4773log

10 = 0.6995log

10 =

2

130sin =o

2

145sin =o

2

360sin =o

++=+

a

btanatctsinbatcosbtsina

22

1. 5 12 10

5 N

o

90

10 kg 12 N

1.2

m/s7.0 2.2

m/s.21

3. 2m/s.31 4. 2m/s7.1

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2. 1000 72 / 10 1. 1,000 N 2. 2,000 N

3. 3,600 N 4. 7,200 N

3. 1. 2.

3. 4.

4. W

g

T

o30

1.3

W 2. W3

3. W2 4.2

W

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uu uu

5. m

M m M m

1. u 2.

M

m2Mu

3.

M

mMu 4.

M

Mm2u

6. 500 .() 2 6 /

7. 101010 ( 1,025 /) ( 1,000 /)1. 2. 0.25 cm3. 1.025 cm 4.

8. 1 80 10109 / 45 1. 0.04 mm 2. 0.4 mm

3. 4 mm 4. 40 mm

9. A P

2

A ( )

1.2

2

3P 2. 2

2

1P

3.2

2

1P + 4. 22

3P +

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nm4402=

10. 1 440 580 1.12

1 = 580 nm 1.12 cm

2.00 m

1. 40 2. 400

3. 4,000 4. 40,000

11. o45 o30

1.

2

1sin

1- 2. ( )2sin -1

3. ( )2tan -1 4.

2

1tan

1-

12. 5 100 1 1. 93 dB 2. 83 dB

3. 60 dB 4. 20 dB

13. 1,920 2,240

640 / 1. 0.5 m 2. 1.0 m

3. 1.5 m 4. 2.0 m

14. 5

6103 /

1.3

103.8 C 2. 3107.1 C

3.6

107.1 C 4. 9103.8 C

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15. I 1. 2. 3. 4.

16. I

1.0

22

VL

1

R

1

+

2.0

22

VL

1

R

1

3.

( ) 22

0

LR

V

+ 4.

( )22

0

LR

V

17. SW A B

1.

C

q

3

1 0 2.

C

q

2

1 0

3.C

q

3

2 0 4.

C

q0

18. I 1. 0.48 A

2. 0.83 A

3. 1.25 A

4. 2.08 A

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19. 15 22 42 = 4.2 /. 1 - 5 1. 0.18 2. 1.20 3. 1.75 4. 2.50

20. 30 18 / 4.2 1. 40% 2. 50%

3. 60% 4. 70%

21. 350 148 1. 202 J 2. 202 J3. 498 J 4. 498 J

22. 3 1

1. J10111 2. J101 8

3. J1033 4. J109 5

23. 1.0 2.0 1.5 1. 2.5 eV 2. 3.0 eV

3. 3.5 eV 4. 4.0 eV

24. -210 138

HePbPo 422068221084 + 4108 276 1. 1.2 mg 2. 1.6 mg

3. 2.4 mg 4. 4.8 mg

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r

r

25. ( )Er

( )Br

1. P 2.

P

Er

Er

3. P 4.

Er

P

Br

r

r

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