Science · Class 6
Electricity and Circuits
Electric cell, bulb, conductors, insulators, and simple circuits.
4 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Electric current flows through a complete circuit from cell's positive to negative terminal. This chapter covers electric cell, bulb, switch, conductors, insulators, and circuit diagrams with symbols.
Electric Cell and Bulb
- Cell converts chemical energy to electrical energy
- Two terminals: positive (+) and negative (−)
- Bulb has filament that glows when current passes
- Complete circuit needed for current flow
Circuit Components
- Switch: opens or closes circuit
- Open circuit: gap — no current, bulb off
- Closed circuit: continuous path — bulb glows
- Electric fuse protects from excessive current
Conductors and Insulators
- Conductors: metals, graphite — allow current
- Insulators: rubber, plastic, wood — block current
- Human body conducts — handle electricity carefully
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Bulb not glowing
Bulb does not glow. List two possible reasons.
- 1Circuit may be open (switch off or broken wire)
- 2Cell may be discharged
- 3Bulb filament may be broken
Answer
Open circuit, dead cell, or fused bulb
Conductor test
Would an eraser connect in circuit to light the bulb?
- 1Eraser is made of rubber
- 2Rubber is an insulator
- 3Current cannot pass — bulb stays off
Answer
No — eraser is an insulator
Key Points to Remember
- ✓ Never connect cell terminals directly without load
- ✓ Torch has cells, switch, bulb in series
- ✓ Circuit diagrams use standard symbols
Exam Tips
- • Draw circuit with correct symbols
- • Distinguish open and closed circuit
- • List three conductors and three insulators
Practice MCQs — Electricity and Circuits
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
Current flows only in: