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Tamil Nadu (TNBSE)Class 6 Science★ 6-10 marks in the TN Class 6 Term 2 exam through book-back MCQs, fill-ups, true/false and short answers

Electricity

Samacheer Kalvi (TN State Board) Class 6 Science — Term 2 Chapter 2, Electricity. The electric cell (chemical to electrical energy) and the battery, electric current and the closed circuit, the switch, conductors and insulators, and series and parallel circuits, with the actual book-back questions, common mistakes and quick revision.

⏱ 14 min readEasy difficulty✓ Free · NCERT-aligned

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Study Guide

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Key points, glossary and the questions most likely to show up.

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By the end of this chapter you'll be able to…

1Explain the electric cell and battery
2Define current and the closed circuit
3Describe the role of a switch
4Differentiate conductors and insulators
5Differentiate series and parallel circuits

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Why this chapter matters

Electricity explains cells, circuits and what carries current — the basis of every electrical device. The cell, the closed circuit, conductors and circuit types are directly tested book-back content in the TN Class 6 Term 2 exam.

Before you start — revise these

A 5-minute refresher here will save you 30 minutes of confusion below.

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Class 5 — Electricity basics

Simple circuits.

Electricity — Class 6 Science (Samacheer Kalvi)

TN State Board (Samacheer Kalvi) Class 6 Science, Term 2 — Chapter 2. Cells, circuits, conductors and insulators.

1. About this chapter

This chapter covers the electric cell and battery, electric current and the circuit, the switch, conductors and insulators, and series and parallel circuits.

2. Cell, battery and current

An electric cell is a device that converts chemical energy into electrical energy. A battery is the combination of two or more cells.
To make a battery, the negative terminal of one cell is connected to the positive terminal of the next.
Electricity is produced in a power station. The flow of electricity through a closed circuit is the current.

3. Circuits and switches

A circuit must be a closed loop (cell + wires + a device such as a bulb) for current to flow.
A switch is the device used to open or close a circuit (turning the current off or on).

4. Conductors, insulators and circuit types

Conductors allow current to pass — metals such as silver (a very good conductor), copper, impure (salty) water.
Insulators do not allow current — rubber, plastic, dry wood, pure water (a poor conductor).
Series circuit: a single path for the current. Parallel circuit: more than one path for the current.

5. Worked examples

Example 1. What does an electric cell convert? Chemical energy into electrical energy.

Example 2. What is a combination of two or more cells called? A battery.

Example 3. In which circuit does electricity have more than one path? A parallel circuit.

6. Book-back questions (Samacheer Kalvi)

I. Choose the correct answer

The device that converts chemical energy into electrical energy is the — (a) bulb / (b) cell. Ans: (b) cell.
Electricity is produced in a — (a) power station / (b) shop. Ans: (a) power station.
A very good conductor among these is — (a) silver / (b) rubber. Ans: (a) silver.

II. Fill in the blanks 4. Materials that allow electric current to pass through them are conductors. 5. The flow of electricity through a closed circuit is current. 6. A switch is the device used to open or close an electric circuit. 7. The combination of two or more cells is called a battery.

III. True or False 8. In a parallel circuit, the electricity has more than one path. — True. 9. To make a battery, the negative terminal of one cell is connected to the negative terminal of the other. — False (negative to positive). 10. Pure water is a good conductor of electricity. — False (impure water is a good conductor).

7. Common mistakes

Mistake: Joining like terminals to make a battery. Fix: Connect the negative of one cell to the positive of the next.
Mistake: Saying pure water conducts well. Fix: Pure water is a poor conductor; impure (salty) water conducts.
Mistake: Thinking current flows in an open circuit. Fix: Current flows only in a closed circuit.

8. Quick revision

Term 2 · Ch 2 · electricity.
Cell = chemical → electrical energy; battery = two or more cells (negative joined to positive).
Current = flow of electricity in a closed circuit; switch opens/closes the circuit; electricity made in power stations.
Conductors (silver, impure water) allow current; insulators (rubber, pure water) do not; parallel circuit = more than one path.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

Cell / battery

cell = chemical → electrical energy; battery = two or more cells

Negative joined to positive.

Current

flow of electricity through a closed circuit

Needs a closed loop.

Switch

opens or closes a circuit

Turns current on/off.

Conductors / circuits

conductors (silver, impure water) vs insulators (rubber, pure water); parallel = many paths

Series = single path.

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Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT

✗ Joining like terminals to make a battery

✓ Connect the negative of one cell to the positive of the next.

WATCH OUT

✗ Saying pure water conducts well

✓ Pure water is a poor conductor; impure (salty) water conducts.

WATCH OUT

✗ Thinking current flows in an open circuit

✓ Current flows only in a closed circuit.

NCERT exercises (with solutions)

Every NCERT exercise from this chapter — what it covers and how many questions to expect.

Choose the correct answer

Book-back MCQs on the cell, power station and silver.

Questions

Fill in the blanks

Conductors, current, switch and battery.

Questions

True or False

Parallel paths, battery terminals and pure water.

Questions

Practice problems

Try each one yourself before tapping "Show solution". Active recall > rereading.

Q1EASY· MCQ

The device that converts chemical energy into electrical energy is the ____.

▶ Show solution

cell.

Q2EASY· Fill in the blanks

The combination of two or more cells is called a ____.

▶ Show solution

battery.

Q3EASY· Fill in the blanks

A ____ is the device used to open or close an electric circuit.

▶ Show solution

switch.

Q4EASY· True/False

True or False: Pure water is a good conductor of electricity.

▶ Show solution

False — pure water is a poor conductor; impure water conducts.

Q5EASY· True/False

True or False: To make a battery, the negative terminal of one cell is joined to the negative of the other.

▶ Show solution

False — the negative of one cell is joined to the positive of the next.

Q6MEDIUM· Answer briefly

What is the difference between a series and a parallel circuit?

▶ Show solution

A series circuit provides a single path for the current, while a parallel circuit provides more than one path.

5-minute revision

The whole chapter, distilled. Read this the night before the exam.

•Term 2 Chapter 2 of Samacheer Kalvi Class 6 Science.
•An electric cell converts chemical energy into electrical energy; a battery is two or more cells.
•To make a battery, join the negative terminal of one cell to the positive of the next.
•Current is the flow of electricity through a closed circuit; a switch opens or closes it.
•Conductors (silver, impure water) allow current; insulators (rubber, pure water) do not.
•A series circuit has a single path; a parallel circuit has more than one path.

Tamil Nadu (TNBSE) marks blueprint

Where the marks come from in this chapter — so you can plan your prep.

Typical chapter weightage: 6-10 marks across book-back MCQ, fill-ups, true/false and short answers

Question type	Marks each	Typical count	What it tests
MCQ / Fill	1	4-6	Cell, current, switch, conductors
True / False	1	2-3	Circuits, battery, water
Short Answer	2	1	Series vs parallel

Prep strategy

Remember the cell converts chemical to electrical energy
Connect negative to positive for a battery
Note current needs a closed circuit
Separate conductors and insulators

Where this shows up in the real world

This chapter isn't just an exam topic — it lives in the world around you.

Home

Switches and circuits run lights and appliances.

Safety

Knowing conductors and insulators prevents shocks.

Gadgets

Cells and batteries power torches and toys.

Exam strategy

Battle-tested tips from teachers and toppers for this chapter.

State the cell converts chemical to electrical energy
Join negative to positive for a battery
Note current needs a closed circuit
Classify materials as conductor or insulator

Going beyond the textbook

For olympiad aspirants and curious learners — topics that build on this chapter.

Draw a simple circuit with a cell, switch and bulb and label the parts.
Explain why fairy lights in series all go off if one bulb fails.

Where else this chapter is tested

CBSE board isn't the only one — other exams test this chapter too.

TN Class 6 Term 2 ExamHigh

NMMS / Foundation ScienceMedium

School unit testsHigh

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Questions students ask

The real ones — pulled from the Q&A community and tutor sessions.

Pure water has very few charged particles (ions) to carry current, so it is a poor conductor; dissolving salts makes it impure water with many ions, which conducts well.

Current needs a complete, unbroken path from the cell through the wires and device and back; if the circuit is open (broken), the flow stops, which is exactly how a switch turns things off.

Practice more, ask doubts, find a tutor

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