Last Updated on May 7, 2025 by XAM CONTENT
Understanding the key concepts of Class 7 Science Chapter 3 – Electricity: Circuits and their Components is crucial for exam success. To make your revision easier, we have created chapterwise mcq questions with Answers for class 7 Science based on the latest syllabus and exam pattern. It is a part of MCQ Questions for CBSE Class 7 Science Series.
These multiple-choice questions will help you assess your knowledge, improve accuracy, and boost confidence for your exams. Whether you are preparing for school tests, online tests or competitive exams, these Electricity: Circuits and their Components MCQs will strengthen your conceptual clarity.
| Chapter | Electricity: Circuits and their Components |
| Book | Curiosity |
| Type of Questions | MCQ Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 7 |
| Subject | Science |
| Useful for | Class 7 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 7 Science Chapterwise MCQ Questions |
MCQ Questions on Electricity: Circuits and their Components Class 7 Science – Curiosity
MCQs
Q1. What causes the torchlight lamp to glow when the switch is turned on?
(a) The switch generates current
(b) The circuit becomes complete
(c) The lamp gets heated
(d) The wires release light
Show Answer
Answer: (b)
Explanation: When the switch is on, it completes the circuit and allows current to flow through the lamp, making it glow.
Q2. What is the role of the filament in an incandescent lamp?
(a) To act as a terminal
(b) To conduct heat
(c) To emit light by glowing
(d) To support the glass bulb
Show Answer
Answer: (c)
Explanation: The filament is a thin wire inside the lamp that glows when electric current passes through it, emitting light.
Q3. Which combination will allow the LED to glow?
(a) Positive wire of battery to shorter LED terminal
(b) Any direction will work
(c) Positive wire to longer LED terminal
(d) Both wires to same LED terminal
Show Answer
Answer: (c)
Explanation: An LED glows only when the positive terminal of the battery is connected to the longer wire (positive terminal) of the LED.
Q4. Which material among the following is an insulator?
(a) Copper wire
(b) Aluminium strip
(c) Rubber eraser
(d) Steel spoon
Show Answer
Answer: (c)
Explanation: Rubber is a poor conductor of electricity and does not allow current to pass through, making it an insulator.
Q5. Why do wires have a plastic or rubber covering?
(a) To decorate the wire
(b) To reduce electricity
(c) To prevent electric shocks
(d) To increase resistance
Show Answer
Answer: (c)
Explanation: Plastic and rubber are insulators used to cover wires to protect users from electric shocks.
Q6. What happens when the filament of a lamp breaks?
(a) The current flows faster
(b) The lamp glows brighter
(c) The circuit becomes more efficient
(d) The lamp stops glowing
Show Answer
Answer: (d)
Explanation: A broken filament interrupts the circuit path, stopping the current flow, and the lamp does not glow.
Q7. Which is the correct direction of current in a circuit using a cell?
(a) From lamp to switch
(b) From negative to positive terminal
(c) From positive to negative terminal
(d) Random direction
Show Answer
Answer: (c)
Explanation: The conventional direction of current is from the positive terminal to the negative terminal of the cell.
Q8. Which of these is a symbol used in circuit diagrams?
(a) Triangle for battery
(b) Square for lamp
(c) Long and short lines for cell
(d) Circle for switch
Show Answer
Answer: (c)
Explanation: In standard circuit symbols, a long line and a short line represent the positive and negative terminals of a cell.
Q9. What happens in an open circuit?
(a) Current flows
(b) Lamp glows brightly
(c) No current flows
(d) Cell explodes
Show Answer
Answer: (c)
Explanation: In an open circuit, the path for electric current is incomplete, so no current flows and devices do not work.
Q10. Which device is used to complete or break an electrical circuit?
(a) Battery
(b) Switch
(c) Lamp
(d) LED
Show Answer
Answer: (b)
Explanation: A switch allows us to complete (ON) or break (OFF) a circuit, controlling the flow of electricity.
Q11. Which of these allows current to flow only in one direction?
(a) Lamp
(b) Switch
(c) LED
(d) Electric cell
Show Answer
Answer: (c)
Explanation: An LED (Light Emitting Diode) allows electric current to flow only in one direction and glows accordingly.
Q12. Why do we use copper wires in electric circuits?
(a) Because they are decorative
(b) Because they are cheap
(c) Because they are good conductors
(d) Because they are heavy
Show Answer
Answer: (c)
Explanation: Copper is a good conductor of electricity, allowing current to flow easily with minimal resistance.
Q13. In a battery of two cells, how are the terminals connected?
(a) Both positive terminals together
(b) Both negative terminals together
(c) Positive to negative
(d) Randomly
Show Answer
Answer: (c)
Explanation: In a battery, the positive terminal of one cell is connected to the negative terminal of the next.
Q14. What does the glowing of a lamp indicate in a circuit?
(a) Cell is damaged
(b) Circuit is open
(c) Filament is broken
(d) Circuit is complete
Show Answer
Answer: (d)
Explanation: A glowing lamp indicates a closed or complete circuit, allowing current to flow through the filament.
Q15. Which is an example of a conductor among these?
(a) Wooden stick
(b) Plastic ruler
(c) Steel spoon
(d) Rubber band
Show Answer
Answer: (c)
Explanation: Steel is a metal and conducts electricity, whereas the others are insulators.
Q16. Which feature of an LED makes it different from an incandescent lamp?
(a) It uses more energy
(b) It has a glowing filament
(c) It works in both directions
(d) It has no filament
Show Answer
Answer: (d)
Explanation: An LED does not have a filament; it emits light through a semiconductor when current passes through.
Q17. Which one is NOT a portable source of electricity?
(a) Electric cell
(b) Battery
(c) Solar panel
(d) Wall socket
Show Answer
Answer: (d)
Explanation: A wall socket supplies electricity from the main grid and is not portable like a battery or cell.
Q18. Why should we not use metal wires without insulation?
(a) They look dull
(b) They reduce brightness
(c) They can cause short circuits or shocks
(d) They increase voltage
Show Answer
Answer: (c)
Explanation: Uninsulated wires can expose live current and lead to short circuits or electric shocks.
Q19. Which component stores chemical energy and converts it to electrical energy?
(a) LED
(b) Lamp
(c) Cell
(d) Wire
Show Answer
Answer: (c)
Explanation: An electric cell stores chemical energy and releases it as electrical energy when used in a circuit.
Q20. Why is the longer terminal of LED always connected to the battery’s positive side?
(a) For better light
(b) To complete the circuit
(c) Because it conducts more
(d) Because current flows only in one direction
Show Answer
Answer: (d)
Explanation: Current flows only in one direction in an LED, from the longer (positive) terminal to the shorter (negative) one.
We hope the given mcq questions with Answers for Electricity: Circuits and their Components Class 7 helps you in your learning.
Quiz: Electricity – Circuits and their Components
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Topics from which mcq questions may be asked
- Electric circuits
- Conductors and insulators
- Switches
Electricity is the heartbeat of the modern world.
Frequently Asked Questions (FAQs) on Electricity: Circuits and their Components MCQ Questions
Q1: Why should I practice Class 7 Science Chapter 3 MCQs?
A1: Practicing MCQs helps in quick revision, improves problem-solving speed, and enhances conceptual understanding of important topics in Class 7 Science.
Q2: Are these Class 7 Science MCQs based on the latest syllabus?
A2: Yes, all the MCQs are designed as per the latest CBSE syllabus and exam pattern to help students prepare effectively.
Q3: Where can I find more MCQs for Class 7 Science?
A3: You can find more chapter-wise MCQs on our website. These are designed to cover important concepts and prepare you for exams.
Q4: Are the answers provided for all MCQs?
A4: Yes, each MCQ is accompanied by the correct answer and explanations to help students understand and learn better.
Q5: How can I improve my performance in Class 7 Science MCQs?
A5: To improve your performance, practice regularly, revise key concepts, and take mock tests to assess your knowledge.
Q6: Do these MCQs help in school exams?
A6: Yes, these MCQs are aligned with school exam patterns and help in scoring well by strengthening conceptual clarity.
Q7: Can I download these MCQs for offline practice?
A7: Yes, you can download or print these MCQs for convenient offline practice.
