116 Lesson plan Charges in electric and magnetic fields

Long-term plan unit: Magnetic field

School:

Date:  

Teacher name:

Grade: 10

Number present:

absent:

Theme of the lesson

Charges in electrical and magnetic fields.

Learning objectives that are achieved at this lesson (Subject Programme reference)

·         To analyze the operating  principle of a cyclotron, magnetic trap, tokamak, hadron collider and to explain nature of polar aurora.

·         To investigate the effect of a magnetic  field on moving particles

Lesson objectives

·         Explain that presence of an electric field makes charge accelerate

·         Explain that magnetic field only changes direction, but not magnitude of charge’s velocity

·         Understand the motion of a charged particle in the simultaneous presence of both electric and magnetic fields

·         use the term “crossed fields” to mean simultaneous presence of electric and magnetic fields at right angle.

Success criteria

Language objectives

Students discuss effect of force acting on a moving charges by the magnetic field.

Subject-specific vocabulary & terminology:

Direction, magnitude, parabolic path,  straight line, circular path,  magnitude, direction, force, angle, charge, velocity, work done by a field

Useful sets of phrases for dialogue and writing:

Both electric and magnetic fields impart acceleration to the charged particle.

But, there is a qualification for magnetic field as acceleration due to magnetic field relates only to the change of direction of motion.

Electric force is along electric field and is capable to bring about change in both direction and magnitude depending upon the initial direction of velocity of the charged particle with respect to electric field.

Values instilled at the lesson

Collaboration and communication foster both positive interdependence and individual accountability. 

Being a citizen-student collaborating with diverse individuals, organizations, and communities inside and outside of the university setting, respecting your own and others' personal and cultural histories. 

Cross-curricular links

Math knowledge helps students calculate angles and rearrange equations.

ICT skills

Students can access interactive visual concept https://www.wiley.com/college/halliday/0470469080/simulations/sim16/sim16.html

Previous learning

Origin of force on a moving charge.

Formula for the force acting on a charge in magnetic field.

Course of the lesson

Planned stages of the lesson

Planned activities at the lesson

Resources

Beginning

(0-8 minutes)

Lead-in:  Warm up

Make comparison chart  of motion in Electric and Magnetic Fields

Electric force in direction of field, Magnetic force perpendicular to direction of travel and field

Magnetic forces only act on moving particles, Electric can act on both moving and stationary

Electric forces can change the speed of moving particle, magnetic forces cannot (one does work while the other does not).

Use several review question to assess student’s understanding.  Repeat some ideas if needed.

Presentation

http://ebooks.dynamic-learning.co.uk/prod_content/extracted_books/9781471809248/OEBPS/as_ch17.htm

Middle

(9-32 minutes)

(33-38minutes)

Problem solving:  students solve problems on stations.

Students have only 8 minutes to solve problem on each station

Station 1: Electric field

They need to use previous knowledge on:

ü  Electric field strength

ü  Work done by an electric field

ü  Thermionic emission

Station 2: Magnetic field

They need to use previous knowledge on:

ü  Force on a moving charge

ü  Left hand rule

ü  Momentum and kinetic energy

Station 3:

They need to use previous knowledge on:

ü  Electric field

ü  Magnetic field

Checking solved problems using marking scheme.

Problems worksheet

End

(36-40 minutes)

Assessment and results discussion.

Total number of marks in a worksheet is

Differentiation – how do you plan to give more support? How do you plan to challenge the more able learners?

Assessment – how are you planning to check students’ learning?

Health and safety regulations

Majority of find direction of the force acting on a moving charge

Some students correctly calculate radius and period of rotation of charge in magnetic field.

Certain group are able to predict application of magnetic force on a moving charge.

Students answer review questions, critical-thinking questions that assess their understanding of the section objectives.

Quiz helps gauge students’ prior knowledge and assess progress midway through a unit.

Health and Safety: Safety Tips

Keep work areas and apparatus clean and neat. Always dean up any clutter made during lab work, rearrange apparatus in an orderly manner, and report any damaged or missing items.

Reflection

Were the lesson objectives/learning objectives realistic? Did all learners achieve the LO?

If not, why?

Did my planned differentiation work well?

Did I stick to timings?

What changes did I make from my plan and why?

Use the space below to reflect on your lesson. Answer the most relevant questions from the box on the left about your lesson. 

Summary evaluation

What two things went really well (consider both teaching and learning)?

1:

2:

What two things would have improved the lesson (consider both teaching and learning)?

1:

2:

What have I learned from this lesson about the class or achievements/difficulties of individuals that will inform my next lesson?