Overview of Chapter 3
Welcome to the Grade 7 English NCERT solutions page for Chapter 3, titled ‘Electricity: Circuits and Their Components.’ This chapter introduces students to the fascinating world of electricity, exploring basic concepts and the components used in electrical circuits. Through comprehensive explanations and supportive resources, this page aims to enhance your understanding of electricity.
Watch the Chapter Notes
To assist with your learning, we have included a YouTube video that showcases an engaging reading of the chapter Notes. This multimedia approach caters to diverse learning styles, ensuring that students can grasp the fundamental concepts of electricity effectively.
NCERT Solutions and MCQ Questions
In addition to video resources, this page provides detailed NCERT solutions for Chapter 3, helping you to address all your queries effectively. You can find comprehensive responses to exercise questions that will solidify your understanding. Moreover, we have compiled multiple-choice questions (MCQs) from the chapter that you can use for self-assessment and revision. These questions are designed to test your knowledge on key concepts related to circuits and components.
MCQs of the Chapter
🔌 Part A: Basic Concepts (बुनियादी अवधारणाएँ)
- Which of the following is a source of electricity?
बिजली का स्रोत इनमें से कौन है?
A. Switch
B. Bulb
C. Electric Cell
D. Wire
Ans: C - An electric cell has how many terminals?
एक विद्युत कोशिका में कितने सिरे होते हैं?
A. One / एक
B. Two / दो
C. Three / तीन
D. Four / चार
Ans: B - The positive terminal of a cell is indicated by which symbol?
एक कोशिका का धनात्मक सिरा किस चिन्ह से दर्शाया जाता है?
A. –
B. O
C. +
D. /
Ans: C - What is the filament in an incandescent lamp made of?
एक तापदीप्त लैम्प में फिलामेंट किससे बना होता है?
A. Plastic
B. Rubber
C. Metal wire
D. Glass
Ans: C - Which component is used to open or close an electric circuit?
विद्युत परिपथ को खोलने या बंद करने के लिए कौन-सा यंत्र प्रयोग किया जाता है?
A. Cell
B. Lamp
C. Switch
D. Battery
Ans: C
⚡ Part B: Electric Circuits (विद्युत परिपथ)
- A complete path for the flow of current is called a –
विद्युत धारा के प्रवाह के लिए पूर्ण मार्ग को क्या कहते हैं?
A. Battery
B. Switch
C. Circuit
D. Lamp
Ans: C - In a complete circuit, current flows from –
एक पूर्ण परिपथ में धारा किस दिशा में प्रवाहित होती है?
A. Negative to Positive
B. Positive to Negative
C. Both directions
D. None of these
Ans: B - A fused bulb has –
फ्यूज हुआ बल्ब किस कारण से काम नहीं करता?
A. No switch
B. Broken filament
C. Weak battery
D. Wrong circuit
Ans: B - Which of the following is necessary for a lamp to glow?
बल्ब के जलने के लिए इनमें से क्या आवश्यक है?
A. Open circuit
B. Switch in OFF position
C. Complete closed circuit
D. One terminal only connected
Ans: C - Which device glows only when current flows in one direction?
कौन-सा यंत्र केवल एक दिशा में धारा प्रवाहित होने पर जलता है?
A. Incandescent lamp
B. Torch
C. LED
D. Battery
Ans: C
🔋 Part C: Components (घटक)
- Which of the following is not a component of a circuit?
निम्न में से कौन विद्युत परिपथ का घटक नहीं है?
A. Battery
B. Fan
C. Wire
D. Switch
Ans: B - What is formed when two or more cells are connected?
दो या अधिक कोशिकाओं को जोड़ने पर क्या बनता है?
A. Circuit
B. Lamp
C. Battery
D. Switch
Ans: C - Which lamp does not contain a filament?
किस लैम्प में फिलामेंट नहीं होता है?
A. Incandescent lamp
B. LED
C. Tube light
D. Torch bulb
Ans: B - What is used to connect components in a circuit?
परिपथ में घटकों को जोड़ने के लिए क्या उपयोग होता है?
A. Plastic
B. Thread
C. Wire
D. Rope
Ans: C - The longer wire of an LED is –
एक एलईडी की लंबी तार होती है –
A. Negative terminal
B. Positive terminal
C. Earth terminal
D. None
Ans: B
🧪 Part D: Conductors and Insulators (संचालक और कुचालक)
- Which of these materials is a good conductor of electricity?
इनमें से कौन-सा पदार्थ विद्युत का अच्छा चालक है?
A. Wood
B. Copper
C. Plastic
D. Rubber
Ans: B - Which is an example of an insulator?
कुचालक का उदाहरण क्या है?
A. Iron rod
B. Silver
C. Glass
D. Aluminium
Ans: C - Why are wires covered with plastic?
तारों को प्लास्टिक से क्यों ढंका जाता है?
A. Decoration
B. Safety from electric shock
C. Colour coding
D. Strength
Ans: B - Which part of our body is a conductor of electricity?
हमारे शरीर का कौन-सा भाग विद्युत का चालक होता है?
A. Nails
B. Bones
C. Wet skin
D. Hair
Ans: C - Which of the following is used for making wires?
इनमें से किसका उपयोग तार बनाने में किया जाता है?
A. Wood
B. Copper
C. Glass
D. Paper
Ans: B
🔄 Part E: Symbols and Diagrams (प्रतीक और आरेख)
- In circuit diagrams, which symbol represents a switch (OFF)?
परिपथ आरेख में OFF स्थिति वाले स्विच का प्रतीक कौन-सा है?
A. Connected line
B. Broken line
C. Circle
D. Arrow
Ans: B - In the symbol of a cell, the long line represents –
कोशिका के प्रतीक में लंबी रेखा किसे दर्शाती है?
A. Negative terminal
B. Positive terminal
C. Wire
D. Switch
Ans: B - Which symbol represents an electric lamp?
विद्युत लैम्प का प्रतीक कौन-सा है?
A. Circle with cross
B. Rectangle
C. Arrow
D. Wavy line
Ans: A - Which organization creates international electrical symbols?
अंतर्राष्ट्रीय विद्युत प्रतीक कौन बनाता है?
A. NCERT
B. WHO
C. IEC
D. UNESCO
Ans: C - What does a circuit diagram show?
परिपथ आरेख क्या दर्शाता है?
A. Shape of devices
B. Symbols of components
C. Colour of wires
D. Current strength
Ans: B
⚠️ Part F: Safety & Application (सावधानी और उपयोग)
- Which statement is correct?
कौन-सा कथन सही है?
A. Plastic is a good conductor
B. Battery has one terminal
C. Electric current is dangerous
D. LED glows in both directions
Ans: C - Which terminal of battery should be connected to the longer wire of an LED?
बैटरी के किस सिरे को एलईडी की लंबी तार से जोड़ा जाना चाहिए?
A. Negative
B. Positive
C. Earth
D. Any
Ans: B - The LED will glow only if –
एलईडी केवल तभी जलेगी जब –
A. It is connected to any terminal
B. It is connected in the correct direction
C. It is fused
D. The circuit is open
Ans: B - When the switch is in OFF position, the circuit is –
जब स्विच OFF स्थिति में होता है, परिपथ होता है –
A. Closed
B. Open
C. Broken wire
D. Reverse
Ans: B - Electricity from power plants is –
विद्युत संयंत्रों से आने वाली बिजली होती है –
A. Direct Current (DC)
B. No current
C. Alternating Current (AC)
D. Static current
Ans: C
Download the Chapter PDF
For your convenience, we offer a free downloadable PDF version of Chapter 3. This PDF includes the complete text of the chapter along with illustrative diagrams and examples that can facilitate your study sessions.
Explore the captivating world of electricity and strengthen your knowledge with the resources provided. Ensure to utilize the video, solutions, and practice questions for a holistic understanding of this vital topic.
