Lesson plan Direction of force

Long-term plan unit: Magnetic field

School:

Date:  

Teacher name:

Grade: 10

Number present:

absent:

Theme of the lesson

Direction of force. Magnetic force and circular motion

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

To investigate the effect of a magnetic  field on moving particles

Lesson objectives

·         Describe the effects of magnetic fields on moving charges.

·         Use the left hand rule  to determine the velocity of a charge, the direction of the magnetic field, and the direction of the magnetic force on a moving charge.

·         Calculate the magnetic force on a moving charge.

·         Calculate the radius of curvature of the path of a charge that is moving in a magnetic field.

Success criteria

Language objectives

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

Subject-specific vocabulary & terminology:

Vector, magnitude, direction, force, angle, charge, velocity

Useful sets of phrases for dialogue and writing:

Magnetic fields exert forces on moving charges.

A charged particle moving through a magnetic field experiences a force that is at right angles to both the direction in which the particle is moving and the direction of the applied 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:

Introduce new topic to the class. Show picture on slide 1.

Ask students what they think is illustrated on the picture.

Discussion:

So why does the magnetic force cause circular motion?

Ø  Magnetic force is always perpendicular to velocity, so that it does no work on the charged particle.

Ø  The particle’s kinetic energy and speed thus remain constant.

Ø  The direction of motion is affected, but not the speed.

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Presentation

https://www.wiley.com/college/halliday/0470469080/simulations/sim16/sim16.html

Middle

(9-19 minutes)

(21-25  minutes)

(26-35minutes)

Explanation.

So, charged particle moves along a circle.

Students asked to memorize  all the laws and formulas for circular motion.

Teacher: Here, the magnetic force supplies the centripetal force . Noting that  , we see that 

Teacher explains left hand rule

Controlled Practice

Practice in determining direction of force in different situation.

STEP 1: Teacher shows application of left hand rule in problems with positive and negative charges.

STEP 2. Students in pairs make 4 practice problems.

STEP 3: Students find direction of force in last problems.

Teacher continuously gives feedback to student, especially to those who have mistakes.

Problem solving

Students solve problems individually.

Presentation

Problems worksheet

End

(36-40 minutes)

Choose a few students and give each 60 seconds to speak about something you’ve covered that day.

To motivate students to speak, you may choose to reward the student who says the most, or includes the most information, with a reward sticker.

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?