magnetics

9
12 Οǵᅶ A. 1. ᙁϟ a. ҞԖวᅶӸӧޑb. Hans Oersted ஒᆶᅶрೱ c. ӦᅶчӦ ȐᅶΚጕҗԿчȑ 2. ᅶǺ a. ޑғᅶ b. Ԝᅶჹځд౽ϒΚໆ c. ڙځΚБӛǺF = |q|vB sinI. d. аӛໆԄ߄ҢǺ ݒറൈ ܤᅶՏǺሺሻ ൌ ݏή ή Τ ܣή Τ ൌ ͳͲ ܩܩݏݏݑ3. ᅶΚጕǺᅶނ܄፦ᓉЗਔڙޑΚБӛǴߚၮਔڙޑΚ 4. ᅶ೯ໆǺ a. Տय़ᑈޑᅶΚጕኧǴΞᆀᅶΚޑଯථ ࡓۓb. ӧҺՖഈ໔ϣǴᅶ ೯ໆޑᡂϯໆ ȐӢԖᅶȑ c. ϦԄǺ ܤή ܣՏǺ ሺሻ ൌ ή ή ݏή ܥΤ ǴᅶȐBȑԖਔংΞᆀᅶ೯ໆஏȐmagnetic flux density.ȑ

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Y2 General Physics for NYMU Medical School

TRANSCRIPT

Page 1: Magnetics

12

A.

1.

a.

b. Hans Oersted

c.

2.

a.

b.

c. F = |q|vB sin .

d.

3.

4.

a.

b.

c.

B magnetic flux density.

Page 2: Magnetics

13

B.

1.

a.

b. cyclotron frequency.

c.

d.

(1)

(a)

(b) FB = qvB FE = qE v =

(2)

1. =V

2. =qvB =qE

Page 3: Magnetics

14

2.

a. l I B b. I B 0

c. [ ] =

3.

a.

b. =| |

c. d. Ps. Electric Dipole

C. Hall Effect

a.

b.

c.

d.

e.

a

b

x

I

Page 4: Magnetics

15

A.

(1)

(2)

(3)

(4) I P

a.

P

P

b.

(X=0)

l

c.n

P

I

I P

R

S N

Page 5: Magnetics

16

A. Faraday’s Law

N

Lenz’s Law

(1) v FB=qvB (2)

(1) r dr

(2)

Page 6: Magnetics

17

B.

B=00 =0

0

r < R

r > R

Path 1 B=0 Path 2

Path 3 B=0

Page 7: Magnetics

18

C. Displacement Current

1.

2. =0

3.

4. Displacement Current Density

5.

r < R

r > R

Page 8: Magnetics

19

D.

1.

2. E

3. Maxwell Equation

Qencl. =0

ic = 0

a. =0

b.

E. Eddy Current

1.

2.

b

Page 9: Magnetics

20

Inductance Henry = Wb/A = V x s/A = w x s = J/A2

.

1. Coil 1 Coil 2

2. Coil 2 Coil 1 i1

M21

3. dt

4.

5. M

6. M12 M21 M

7.

B.

Unit:

Self-induced emf

1. Self-induced emf En

2.

E = En + Ec = 0 Ec 0

3.

En a, b

ab Vab