Class 7 Exam > Class 7 Notes > Science Class 7 (Old NCERT) > Unit Test: Electricity and Its Effects
Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT) PDF Download
Time: 1 hour
Maximum Marks: 30
Attempt all questions.
- Question numbers 1 to 5 carry 1 mark each.
- Question numbers 6 to 8 carry 2 marks each.
- Question numbers 9 to 11 carry 3 marks each.
- Question numbers 12 & 13 carry 5 marks each.
Q1: Which of the following is an electrical component used in a circuit? (1 Mark)
(a) Bulb
(b) Wire
(c) Battery
(d) All of the above
Q2: What does an electric fuse do in a circuit? (1 Mark)
Q3: Which of the following devices does not work based on the heating effect of electric current? (1 Mark)
(a) Electric iron
(b) Refrigerator
(c) Immersion heater
(d) Toaster
Q4: What is an electromagnet? (1 Mark)
Q5: Name one safety device other than a fuse that prevents excessive current from damaging electrical appliances. (1 Mark)
Q6: Differentiate between open circuit and closed circuit. (2 Marks)
Q7: Explain how overloading can cause damage to electrical circuits. (2 Marks)
Q8: Why do CFLs consume less electricity than ordinary bulbs? (2 Marks)
Q9. Explain how an electric fuse works. (3 Marks)
Q10: Describe how electromagnets are used in daily life. (3 Marks)
Q11: How does a Miniature Circuit Breaker (MCB) work? (3 Marks)
Q12: Explain the construction and working of an electric bell with a diagram. (5 Marks)
Q13: How does the magnetic effect of electric current help in making an electromagnet? Explain its applications. (5 Marks)
The document Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT) is a part of the Class 7 Course Science Class 7 (Old NCERT).
All you need of Class 7 at this link: Class 7
|
111 videos|435 docs|28 tests
|
FAQs on Unit Test: Electricity and Its Effects - Science Class 7 (Old NCERT)
| 1. What are the basic principles of electricity? |  |
Ans. The basic principles of electricity include the concepts of voltage (the electric potential difference), current (the flow of electric charge), and resistance (the opposition to current flow). Ohm's Law, which states that voltage equals current times resistance (V = I x R), is a fundamental relationship in understanding how electricity works.
| 2. What are the different effects of electricity? | |
Ans. The main effects of electricity include heating (as in electric heaters), magnetic effects (used in motors and generators), and chemical effects (such as electrolysis). Each of these effects demonstrates how electrical energy can be converted into other forms of energy or used in various applications.
| 3. How does electricity flow in a circuit? | |
Ans. Electricity flows in a circuit when there is a complete path for current to travel. This involves a power source (like a battery or generator), conductive materials (like wires), and a load (like a light bulb or motor). When the circuit is closed, electrons move from the negative terminal of the power source through the circuit and return to the positive terminal.
| 4. What safety precautions should be taken when working with electricity? | |
Ans. Safety precautions when working with electricity include using insulated tools, wearing rubber-soled shoes, avoiding wet conditions, and ensuring that circuits are de-energized before working on them. It's also essential to use circuit breakers and fuses to protect against overloads and short circuits.
| 5. What is the significance of grounding in electrical systems? | |
Ans. Grounding is crucial in electrical systems as it provides a safe pathway for excess electricity to flow into the ground in the event of a fault. This helps prevent electric shock, equipment damage, and potential fires. Grounding helps stabilize voltage levels and protects sensitive electronic equipment.
About this Document
4.91/5
Rating
Sep 04, 2025
Last updated
Document Description: Unit Test: Electricity and Its Effects for Class 7 2025 is part of Science Class 7 (Old NCERT) preparation.
The notes and questions for Unit Test: Electricity and Its Effects have been prepared according to the Class 7 exam syllabus. Information about Unit Test: Electricity and Its Effects covers topics
like and Unit Test: Electricity and Its Effects Example, for Class 7 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Unit Test: Electricity and Its Effects.
Introduction of Unit Test: Electricity and Its Effects in English is available as part of our Science Class 7 (Old NCERT)
for Class 7 & Unit Test: Electricity and Its Effects in Hindi for Science Class 7 (Old NCERT) course.
Download more important topics related with notes, lectures and mock test series for Class 7
Exam by signing up for free. Class 7: Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT)
Description
Full syllabus notes, lecture & questions for Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT) - Class 7 | Plus excerises question with solution to help you revise complete syllabus for Science Class 7 (Old NCERT) | Best notes, free PDF download
Information about Unit Test: Electricity and Its Effects
In this doc you can find the meaning of Unit Test: Electricity and Its Effects defined & explained in the simplest way possible. Besides explaining types of
Unit Test: Electricity and Its Effects theory, EduRev gives you an ample number of questions to practice Unit Test: Electricity and Its Effects tests, examples and also practice Class 7
tests
Related Searches
MCQs
,Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT)
,Summary
,Semester Notes
,past year papers
,Free
,practice quizzes
,Exam
,Objective type Questions
,Important questions
,Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT)
,Previous Year Questions with Solutions
,study material
,Viva Questions
,Extra Questions
,shortcuts and tricks
,Unit Test: Electricity and Its Effects | Science Class 7 (Old NCERT)
,ppt
,Sample Paper
,video lectures
,mock tests for examination
;
Additional Information about Unit Test: Electricity and Its Effects for Class 7 Preparation
Unit Test: Electricity and Its Effects Free PDF Download
The Unit Test: Electricity and Its Effects is an invaluable resource that delves deep into the core of the Class 7 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Unit Test: Electricity and Its Effects now and kickstart your journey towards success in the Class 7 exam.
Importance of Unit Test: Electricity and Its Effects
The importance of Unit Test: Electricity and Its Effects cannot be overstated, especially for Class 7 aspirants.
This document holds the key to success in the Class 7 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Unit Test: Electricity and Its Effects Notes
Unit Test: Electricity and Its Effects Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Unit Test: Electricity and Its Effects.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Unit Test: Electricity and Its Effects Notes on EduRev are your ultimate resource for success.
Unit Test: Electricity and Its Effects Class 7 Questions
The "Unit Test: Electricity and Its Effects Class 7 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 7 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Unit Test: Electricity and Its Effects on the App
Students of Class 7 can study Unit Test: Electricity and Its Effects alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Unit Test: Electricity and Its Effects,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Unit Test: Electricity and Its Effects is prepared as per the latest Class 7 syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup