Lesson Plan of Electric Circuit
General Science Grade V
Students’ Learning Outcomes
· Describe the catamenia of electrical electric flow inward an electrical circuit.
· Describe fuse in addition to its importance inward whatever electrical circuit.
Information for Teachers
· A battery jail cellular telephone is used inward dissimilar devices such every bit torch, toys, watches in addition to many appliances.
· One terminate of the battery jail cellular telephone is positive in addition to other is negative. There is deficiency of electrons at the positive terminate in addition to abundance of electrons at the negative end. When 2 ends of a battery jail cellular telephone are connected through wire, electrons start flowing from the terminate where they are inward abundance towards the terminate where they are less inward number.
· This catamenia of electrons is called every bit electrical current.
· Since electrons comport accuse therefore nosotros tin state that an electrical electric flow is the catamenia of charges.
· A fuse is inserted inward the circuit to protect the appliance from burning.
· Each fuse is rated for maximum value of current.
· If to a greater extent than electrical flow passes through it, the fuse blows out i.e. catamenia of charges stops. In this way, the electrical appliances safe.
Material / Resources
Torch bulbs, battery cells, switches, drinking glass plates, a sparse metallic element wire of depression melting point, connecting wires of dissimilar lengths, textbook
Worm upward Activity
· Ask simply about questions to remember therefore previous noesis of the students nigh electrical circuit:
1. What is an electrical circuit?
2. Do you lot intend that straightaway wire is a circuit?
3. What practise you lot request to brand a circuit?
4. What are the sources of electricity?
5. Have you lot heard nigh fatal accidents in addition to fires caused past times electricity in addition to people getting electrical shocks?
6. Is it due to dangerous utilisation of electricity?
· Let the students hash out the questions. Write the substitution points of their give-and-take on the board in addition to denote the topic i.e. prophylactic utilisation of electricity.
Development
Activity 1
· Divide the students into groups.
· Provide each grouping amongst a battery cell, a torch bulb amongst holder, a switch in addition to iii pieces of connecting wires. · Draw a circuit diagram on the board.
· Ask the students to build an electrical circuit according to the diagram. Direct them to transcend away on the switch open.
· Ask them why the bulb is non glowing. Ask what practise they intend would hap if the switch is closed. Will the bulb glow?
· What causes the bulb to glow? After students’ response, inform them that the bulb does non glow, inform them that the bulb doesn’t glow if the switch is open. Such a circuit is called incomplete or opened upward circuit.
· Ask them to unopen the switch in addition to tell them that the bulb glows when the circuit is complete. The electrical circuit becomes consummate or closed circuit when the switch is closed.
· After this activity, tell the students that electrical electric flow tin solely catamenia through a closed circuit. No electrical electric flow flows when the circuit inward open.
Activity 2
· Divide the students into groups.
· Give them a battery consisting of 2-3 cells, a slice of sparse wire amongst depression melting point, bulb holder, switch in addition to connecting wires.
· Ask them to consummate the circuit every bit In action 1.
· Now inquire them to connect the sparse wire amongst depression melting points inward the circuit.
· Ask the students: Did the sparse wire burn? What is the reason?
(Expected response: because the electrical flow that passes through wire is to a greater extent than than its limit)
· Ask: How the electrical appliances are saved past times using fuse?
(Expected response: Fuse doesn’t allow excess amount of electrical flow to catamenia through the appliance)
· After getting the students’ response, tell them that if the electrical flow to a greater extent than than the rated value of fuse passes through the fuse, it blows out in addition to electrical circuit breaks. In this means the electrical appliances is saved from burning.
Sum upward / Conclusion
· The electrical flow flows inward a circuit when the switch is closed. It is called consummate circuit.
· The electrical flow doesn’t catamenia inward a circuit when the switch is open. It is called incomplete circuit.
· The battery is a origin of electricity.
· A fuse is used inward the circuit of electrical appliance to salve it from burning.
Assessment Ask the next questions:
· What causes the bulb to glow when the circuit is complete?
· Why does the bulb non glow if in that place is no electrical jail cellular telephone inward the electrical circuit?
· What is the origin of electrical electric flow inward the circuit?
· Does the bulb glow if the electrical jail cellular telephone inward the circuit is reversed?
· What happens if the fuse is non used inward the appliance?
· What is the operate of connecting wires inward the circuit?
Follow up
Make a listing of electrical appliances at your domicile inward which you lot intend the fuses accept been used?
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