55.56_Ampere and Lorentz Forces (1)
Оценка 4.6

55.56_Ampere and Lorentz Forces (1)

Оценка 4.6
ppt
08.05.2020
55.56_Ampere and Lorentz Forces (1)
55.56_Ampere and Lorentz Forces (1).ppt

Lesson Objectives By the end of the lesson learners will be able: 10

Lesson Objectives By the end of the lesson learners will be able: 10

Lesson Objectives

By the end of the lesson learners will be able:

10.4.1.2 – to apply the left-hand rule and describe the effect of a magnetic field on moving charged particles and electrical conductor;

1

Keywords English Russian Kazakh

Keywords English Russian Kazakh

Keywords

English

Russian

Kazakh

Magnetic flux

Magnetic flux density

Permeability

Fleming’s left hand rule

Conventional current

2

In 1820 ‘’A compass needle moved when it was close to a wire connected to a battery

In 1820 ‘’A compass needle moved when it was close to a wire connected to a battery

3

In 1820
‘’A compass needle moved when it was close to a wire connected to a battery.’’

Professor Hans Christian Oersted

4 B

4 B

4

B

5 B

5 B

5

B

6 RIGHT HAND GRIP RULE:

6 RIGHT HAND GRIP RULE:

6

RIGHT HAND GRIP RULE:

7 current outwards current inwards B

7 current outwards current inwards B

7

current outwards

current inwards

B

I N turns In the middle At the end

I N turns In the middle At the end

8

I

N turns

In the middle

At the end

N S Interaction between a magnet and the field due to a current

N S Interaction between a magnet and the field due to a current

9

N

S

Interaction between a magnet and the field due to a current

10

10

10

11 FLEMING’S LEFT HAND MOTOR RULE

11 FLEMING’S LEFT HAND MOTOR RULE

11

FLEMING’S LEFT HAND MOTOR RULE

FLEMING’S LEFT HAND MOTOR RULE

FLEMING’S LEFT HAND MOTOR RULE

12

FLEMING’S LEFT HAND MOTOR RULE

FOREFINGER = FIELD

THUMB = MOTION

SECOND FINGER = CURRENT

Activity 13

Activity 13

Activity

13

Answers 14

Answers 14

Answers

14

F=B I LSinθ Where L = length of conductor in the field Θ is the angle between

F=B I LSinθ Where L = length of conductor in the field Θ is the angle between

15

F=B I LSinθ

Where L = length of conductor in the field
Θ is the angle between B and I

16

16

16

Like Currents Attracts Unlike Currents

Like Currents Attracts Unlike Currents

Like Currents Attracts Unlike Currents Repel

17

Force experienced by a charged particle (charge

Force experienced by a charged particle (charge

18

Force experienced by a charged particle (charge Q) moving with a velocity, v ,in a magnetic field of Flux density, B.

+

Q

Particle travels L metres from A to B in t seconds

F = B I L

F = BQv

B-Force on Charged Particles 19

B-Force on Charged Particles 19

B-Force on Charged Particles

19

20

20

20

F F THE FORCE IS ALWAYS PERPENDICULAR

F F THE FORCE IS ALWAYS PERPENDICULAR

21

+

F

F

THE FORCE IS ALWAYS PERPENDICULAR TO THE MOTION

THE PARTICLE MUST MOVE ALONG AN ARC OF A CIRCLE

+

Frequency of Rotation, f + The frequency ,f, is independent of the radius and the velocity

Frequency of Rotation, f + The frequency ,f, is independent of the radius and the velocity

22

Frequency of Rotation, f

+

The frequency ,f, is independent of the radius and the velocity

This is the principle of the CYCLOTRON

Particle Radius, r. 23

Particle Radius, r. 23

Particle Radius, r.

 

23

CYCLOTRON + High frequency square wave www

CYCLOTRON + High frequency square wave www

24

CYCLOTRON

+

High frequency square wave

www.youtube.com/watch?v=_T745HXduHY

25

25

25

26

26

26

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