chap19(西尔斯当代大学物理)
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right-hand rule:
Fig.19-6
no explicit（明确的） expression unit in SI
T (Tesla) =N / A m 10 Gauss
4
FB always perpendicular to
v
and B
14
FB qv B is also a formula for finding F B
Welcome you here for
University Physics
Meng Da Min HeFei University of Technology 2013 fall
绪论
对标准问题的标准答案的记诵 重燃求知欲 思维训练
三件东西至为重要：图书馆、好的老师、互联网
独立而有尊严的生活 自我意识与公共精神---有稳定的价值观，有独 立思考能力，有积极的行为方式，做一个直立行 走的人，大写的人
B
20
Fast-Reading: example 19.12
21
Review:
1. Magnetic Fields:
FB qv B
FB Magnitude: B qv sin
direction: right-hand rule
F
B
q
v
zero-force axis (the direction of B )
0 FB 0
B
maximum sideway force when
2
( FB ) max B qv
q
Fm 0
22
V
2. Hall effect:
B
Hall potential difference V
BI BI VH＝ RH nel l
BI n＝ VH el
科学家用中子散射观测 到了“狄拉克弦”的存 在
1). definition formula: FB qv B
zero-force axis (the direction of B )
F definition of electric field: E q0
2. Definition of B
–
B
–
vd
f
–
–
EH
I
+
+
+
eEH evd B
EH＝Bvd
VH ＝Bvd d
VH
B
I nevd ld
1 霍耳系数 RH＝ ne
I vd＝ neld
BI VH＝ nel
BI VH＝RH l 18
3. Application of hall effect 1). provide a sign judgement of charge carriers in conductors BI BI
10
§19-1&2. Magnetism and Magnetic Field
1. Analogy between electricity and magnetism
EB
E lines B lines
E B
q E E dS
q qm ?
Fig.19-4 (monopoles in magnetism) 11 (or magnetic monopoles)
(half a million of words ) original English material in two semesters. about 20 min/page at least in average. 180h will be spent in reading the paragraphs my lecture will cover. English is a worry for most learners in China . physics is a difficult subject for most students. ambitious、self-confidence are needed.
my lectures are the road signs in your study.
• • • •
Try my best to achieve the four: “C”. Complete cover all the knowledge points . Clarification Concise Correct
I
- - - - -
_ _ _ _ + _ + _ + _ + _ + + + + + +
d
l
17
2. Theory of Hall effect
Assume: charge carriers are electrons and they drift in the opposite direction of current I. (drift speed is vd).
(2) the goals of PBL
equal knowledge in physics.
building a suitable environment to promote
students conversion: from English learners into English users.
E
+ + + + + + + + + + +
I
- - - - -
_ _ _ _ + _ + _ + _ + _ + + + + + +
d
l
1). provide a sign judgement of charge carriers in conductors 2).measurement of the number of carriers per unit volume of conductor. 3).measurement of B,I,T
B
magnitude of B
FB B qv sin
q
F
FB 0
V
( (v , B) 0)
B
q
maximum sideway force when
v
/ 2, ( FB )max
( FB )max Bqv, B qv
13
2). discuss
Find (a) the force on the electron (b) repeat your calculation for a proton having the same velocity
15
3. Crossed Fields: Discovery of the Electron
Fe FB
Email: mdm@
mdm@
Welcome you send me mails to feedback anything about Teaching
index
• Part A Mechanism • Part B Electricity • Part C Magnetism
祝愿年轻的朋友们：
努力学习， 勇于探索， 大胆创新， 为我们美好的明天 付出今天的辛劳和 汗水！
Introduction on PBL
(1) a challenge to greater efforts in your study.
1200 pages , 1000 words/page. you should finish reading at least 550pages.
Self-reading: P7
16
§19-8. Crossed Fields: The Hall Effect (1879)
1. Hall effect
1). Hall potential difference V and hall electric field E
l
B
I
B
vH d
E
+ + + + + + + + + + +
VH＝
+
B
+
+ f
+
vd
EH
nel
I
RH
l –
B
–
vd
f
–
–
EH
I
+ + + 2).measurement of the number of carriers per unit volume of conductor.
–
–
–
BI n＝ VH el
3).measurement of B,I,T
(3) Chapter features on Fundamental of Physics
Opening puzzlers. Test your understanding:
Simple questions inserted between paragraphs. If you can answer it without any difficulty, you can read on. Otherwise, you should review. Sample problems with key idea______example. Problem-Solving tactics: How to solve problems step by step. How to avoid common errors.
Self-Introduction in brief
Name: Meng Da-Min
Interest : Astrophysics graduated in 1999 AnHui Normal University. Becoming a graduate of USTC in the same year Went to Canada as a visiting scholar in 2010.
Chap23 Electromagnetic waves
Chap 19 Magnetic Field and Magnetic Forces
§19-1&2. Magnetism and Magnetic field §19-3. Magnetic field Lines and Magnetic Flux §19-4. Motion of Charged Particles in a Magnetic field §19-5. Applications of Motion of charged particle (Cyclotrons and Synchrotrons ) §19-6. Magnetic force on a Current-Carrying Conductor §19-7. Force and Torque on a current loop §19-8. The Hall Effect
0
高斯定理
2009 年9月4日出版的《科学》杂志 上，德国亥姆霍兹材料与能源中心的 乔纳森· 莫里斯(Jonathan Morris)领 导的团队和法国Laue-Langevin研究 所汤姆· 芬内尔(Tom Fennell)领导的 团队分别报告: 在自旋冰晶体中观察
到了类似磁单极子的“准粒子”。
19
*磁流体发电
气体在3000K高温下将
+
I
发生电离，成为正、负离子，
将高温等离子气体以 1000m/s 的速度进入均匀磁
高温 等离 子气
场B中
正电荷聚集在上板，负 电荷聚集在下板，因而 可向外供电。 优点：无机械损耗，可以提高效率， 缺点：尚存在技术问题有待解决。
+ + + fm v + － v fm – – – –
Example 1: An electron that has velocity 6 6 v (2.0 10 m / s)i (3.0 10 m / s) j moves through the magnetic field
B (0.03T )i (0.15T ) j .
• Part D Wave and Optics
• Part E Modern Physics
PART D Magnetism
Chap19 Magnetic field and magnetic forces Chap20 Sources of Magnetic field (due to Currents) Chap21 Electromagnetic Induction Chap22 Inductance
Fig.19-6
no explicit（明确的） expression unit in SI
T (Tesla) =N / A m 10 Gauss
4
FB always perpendicular to
v
and B
14
FB qv B is also a formula for finding F B
Welcome you here for
University Physics
Meng Da Min HeFei University of Technology 2013 fall
绪论
对标准问题的标准答案的记诵 重燃求知欲 思维训练
三件东西至为重要：图书馆、好的老师、互联网
独立而有尊严的生活 自我意识与公共精神---有稳定的价值观，有独 立思考能力，有积极的行为方式，做一个直立行 走的人，大写的人
B
20
Fast-Reading: example 19.12
21
Review:
1. Magnetic Fields:
FB qv B
FB Magnitude: B qv sin
direction: right-hand rule
F
B
q
v
zero-force axis (the direction of B )
0 FB 0
B
maximum sideway force when
2
( FB ) max B qv
q
Fm 0
22
V
2. Hall effect:
B
Hall potential difference V
BI BI VH＝ RH nel l
BI n＝ VH el
科学家用中子散射观测 到了“狄拉克弦”的存 在
1). definition formula: FB qv B
zero-force axis (the direction of B )
F definition of electric field: E q0
2. Definition of B
–
B
–
vd
f
–
–
EH
I
+
+
+
eEH evd B
EH＝Bvd
VH ＝Bvd d
VH
B
I nevd ld
1 霍耳系数 RH＝ ne
I vd＝ neld
BI VH＝ nel
BI VH＝RH l 18
3. Application of hall effect 1). provide a sign judgement of charge carriers in conductors BI BI
10
§19-1&2. Magnetism and Magnetic Field
1. Analogy between electricity and magnetism
EB
E lines B lines
E B
q E E dS
q qm ?
Fig.19-4 (monopoles in magnetism) 11 (or magnetic monopoles)
(half a million of words ) original English material in two semesters. about 20 min/page at least in average. 180h will be spent in reading the paragraphs my lecture will cover. English is a worry for most learners in China . physics is a difficult subject for most students. ambitious、self-confidence are needed.
my lectures are the road signs in your study.
• • • •
Try my best to achieve the four: “C”. Complete cover all the knowledge points . Clarification Concise Correct
I
- - - - -
_ _ _ _ + _ + _ + _ + _ + + + + + +
d
l
17
2. Theory of Hall effect
Assume: charge carriers are electrons and they drift in the opposite direction of current I. (drift speed is vd).
(2) the goals of PBL
equal knowledge in physics.
building a suitable environment to promote
students conversion: from English learners into English users.
E
+ + + + + + + + + + +
I
- - - - -
_ _ _ _ + _ + _ + _ + _ + + + + + +
d
l
1). provide a sign judgement of charge carriers in conductors 2).measurement of the number of carriers per unit volume of conductor. 3).measurement of B,I,T
B
magnitude of B
FB B qv sin
q
F
FB 0
V
( (v , B) 0)
B
q
maximum sideway force when
v
/ 2, ( FB )max
( FB )max Bqv, B qv
13
2). discuss
Find (a) the force on the electron (b) repeat your calculation for a proton having the same velocity
15
3. Crossed Fields: Discovery of the Electron
Fe FB
Email: mdm@
mdm@
Welcome you send me mails to feedback anything about Teaching
index
• Part A Mechanism • Part B Electricity • Part C Magnetism
祝愿年轻的朋友们：
努力学习， 勇于探索， 大胆创新， 为我们美好的明天 付出今天的辛劳和 汗水！
Introduction on PBL
(1) a challenge to greater efforts in your study.
1200 pages , 1000 words/page. you should finish reading at least 550pages.
Self-reading: P7
16
§19-8. Crossed Fields: The Hall Effect (1879)
1. Hall effect
1). Hall potential difference V and hall electric field E
l
B
I
B
vH d
E
+ + + + + + + + + + +
VH＝
+
B
+
+ f
+
vd
EH
nel
I
RH
l –
B
–
vd
f
–
–
EH
I
+ + + 2).measurement of the number of carriers per unit volume of conductor.
–
–
–
BI n＝ VH el
3).measurement of B,I,T
(3) Chapter features on Fundamental of Physics
Opening puzzlers. Test your understanding:
Simple questions inserted between paragraphs. If you can answer it without any difficulty, you can read on. Otherwise, you should review. Sample problems with key idea______example. Problem-Solving tactics: How to solve problems step by step. How to avoid common errors.
Self-Introduction in brief
Name: Meng Da-Min
Interest : Astrophysics graduated in 1999 AnHui Normal University. Becoming a graduate of USTC in the same year Went to Canada as a visiting scholar in 2010.
Chap23 Electromagnetic waves
Chap 19 Magnetic Field and Magnetic Forces
§19-1&2. Magnetism and Magnetic field §19-3. Magnetic field Lines and Magnetic Flux §19-4. Motion of Charged Particles in a Magnetic field §19-5. Applications of Motion of charged particle (Cyclotrons and Synchrotrons ) §19-6. Magnetic force on a Current-Carrying Conductor §19-7. Force and Torque on a current loop §19-8. The Hall Effect
0
高斯定理
2009 年9月4日出版的《科学》杂志 上，德国亥姆霍兹材料与能源中心的 乔纳森· 莫里斯(Jonathan Morris)领 导的团队和法国Laue-Langevin研究 所汤姆· 芬内尔(Tom Fennell)领导的 团队分别报告: 在自旋冰晶体中观察
到了类似磁单极子的“准粒子”。
19
*磁流体发电
气体在3000K高温下将
+
I
发生电离，成为正、负离子，
将高温等离子气体以 1000m/s 的速度进入均匀磁
高温 等离 子气
场B中
正电荷聚集在上板，负 电荷聚集在下板，因而 可向外供电。 优点：无机械损耗，可以提高效率， 缺点：尚存在技术问题有待解决。
+ + + fm v + － v fm – – – –
Example 1: An electron that has velocity 6 6 v (2.0 10 m / s)i (3.0 10 m / s) j moves through the magnetic field
B (0.03T )i (0.15T ) j .
• Part D Wave and Optics
• Part E Modern Physics
PART D Magnetism
Chap19 Magnetic field and magnetic forces Chap20 Sources of Magnetic field (due to Currents) Chap21 Electromagnetic Induction Chap22 Inductance