Lakhmir Singh Solutions for Class 10 Physics Chapter 1 Electricity
By Ankit Gupta
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Updated on 2 May 2025, 15:57 IST
The chapter on Electricity in Class 10 Physics is one of the most important topics in the CBSE curriculum. It helps students understand how electric current works and how it is used in our daily lives. To make this topic easier to learn, many students use Lakhmir Singh’s Physics book, which is known for its simple language and clear explanations. However, some of the questions in the book can be tricky. This is where Lakhmir Singh Solutions for Class 10 Physics Electricity come in handy.
These solutions are prepared by subject experts who explain each answer step by step. The main aim of these solutions is to help students understand the logic behind every answer instead of just memorizing it. With the help of these detailed answers, students can learn how to solve numerical problems, understand key concepts like Ohm’s Law, resistance, voltage, current, power, and the heating effect of electric current, among others.
Another benefit of using these solutions is that they cover all the in-text questions, exercises, and additional questions given in the Lakhmir Singh textbook. This means that students can use them to practice thoroughly for their school exams, class tests, and board exams. The solutions also follow the CBSE guidelines and are based on the latest syllabus, so students don’t have to worry about outdated content.
Studying Physics can sometimes feel difficult because of the formulas and scientific terms. But with Lakhmir Singh’s Solutions, students can break down tough concepts into simpler parts. Each solution is explained in such a way that even an average student can easily grasp the idea. These answers also help in building a strong foundation for future science studies, especially for students planning to take up science in higher classes.
In short, Lakhmir Singh Solutions for Class 10 Physics – Electricity are an excellent learning tool. They make learning easy, save time, and boost confidence in students. Whether you're revising before an exam or trying to understand a tough question, these solutions will guide you through every step. So, if you want to score better and understand Physics deeply, these solutions are a must-have resource.
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Lakhmir Singh Class 10 Chapter 1 PDF includes detailed solutions, examples, and extra questions to help you master real numbers and other topics. Click here to download the Lakhmir Singh Class 10 Chapter 1 PDF.
Access Answers to Lakhmir Singh Solutions for Class 10 Physics Chapter 1 Electricity
Q1. What is another name for the unit joule per coulomb?
Answer: The unit joule per coulomb is also called volt. Volt is the SI unit used to measure electric potential or electromotive force. It shows the difference in energy between two points in a wire carrying 1 ampere of current where 1 watt of power is used.
Q2. Which of the following correctly explains a volt?
a) A volt is a joule per ampere
b) A volt is a joule per coulomb
Answer: The correct answer is b)
A volt is a joule per coulomb. This means when 1 joule of work is done to move 1 coulomb of charge, the potential difference is 1 volt.
Q3. a) What does p.d stand for?
b) What device is used to measure p.d?
Answer:
a) p.d means potential difference. It is the difference in energy between two points in a circuit. It is calculated using the formula V = I × R, where V is voltage, I is current, and R is resistance.
b) A voltmeter is used to measure potential difference. It is shown with the symbol V and is connected in parallel in a circuit.
Q4. What does it mean when the electric potential at a point is 1 volt?
Answer: It means 1 joule of work is needed to move 1 coulomb of positive charge from a far distance to that point.
Q5. How much work is done when 1 coulomb of charge moves through a potential difference of 1 volt?
Answer: Work done = Potential difference × Charge = 1 × 1 = 1 joule. So, 1 joule of work is done.
Q6. What is the SI unit of potential difference?
Answer: The SI unit of potential difference is volt. It is the potential across a resistance of one ohm when one ampere of current flows.
Also Check: Lakhmir Singh Solutions for Class 10
Q7. How much work is done in moving a 2 coulomb charge through a potential difference of 12 volts?
Answer: Work done = Potential difference × Charge = 12 × 2 = 24 joules. So, 24 joules of work is done.
Q8. What is the unit of electric charge?
Answer: The unit of electric charge is coulomb. It is the amount of charge transferred by a current of one ampere in one second.
Q9. What is one coulomb of charge?
Answer: One coulomb is the amount of charge that exerts a force of 9 × 10⁹ newtons on another charge at a distance of 1 meter.
Q10. Fill in the blanks:
a) Potential difference is measured in …………. using a ……… placed in ………… across a component.
b) Copper is a good ………… and plastic is an ………….
Answer:
a) volts, voltmeter, parallel
b) conductor, insulator
Q11. What are conductors and insulators? Give two examples of each.
Answer: Conductors are materials that allow electricity to flow through them. Examples: copper, silver. Insulators are materials that do not let electricity pass. Examples: plastic, cotton.
Q12. Identify which of the following are conductors and which are insulators:
Sulphur, silver, copper, cotton, aluminium, air, nichrome, graphite, paper, porcelain, mercury, mica, Bakelite, polythene, manganin
Answer:
- Conductors: silver, copper, aluminium, nichrome, graphite, mercury, manganin
- Insulators: sulphur, cotton, air, paper, porcelain, mica, Bakelite, polythene
Q13. What is electric potential at a point? What is its unit?
Answer: Electric potential at a point is the work needed to move 1 coulomb of positive charge from a far point to that point. Its unit is volt.
Q14. a) What is the formula that relates potential difference, work done, and charge?
b) Find the work done in moving 4 coulombs from 220V to 230V.
Answer:
a) Potential difference = Work done ÷ Charge
b) Potential difference = 230 - 220 = 10 volts. Work done = 10 × 4 = 40 joules
Q15. a) Name the device used to measure potential difference across a conductor.
b) How much energy is given by a 12V supply to each coulomb of charge?
Answer:
a) Voltmeter
b) Energy = Potential difference × Charge = 12 × 1 = 12 joules. So, 12 joules of energy is given to 1 coulomb of charge.
FAQs on Lakhmir Singh Solutions for Class 10 Physics Electricity
What are Lakhmir Singh Solutions for Class 10 Physics – Electricity?
These are detailed, step-by-step answers to all the questions provided in the Electricity chapter of the Lakhmir Singh Physics textbook. They include solutions to in-text questions, end-of-chapter exercises, and additional questions, making it easier for students to understand and revise the topic.
Are these solutions based on the latest CBSE syllabus?
Yes, all the solutions are prepared according to the latest CBSE curriculum and guidelines. They align with the updated Class 10 Science syllabus, ensuring students prepare with the most relevant and accurate content.
How can these solutions help me in my board exams?
The Electricity chapter is a high-weightage topic in the Class 10 board exams. These solutions help you understand concepts like Ohm’s Law, resistance, current, voltage, power, and more, through solved examples and numericals. This builds strong conceptual clarity and boosts your confidence in answering exam questions correctly.
Are numerical problems also solved in these solutions?
Absolutely! One of the key features of these solutions is that they include step-by-step explanations of numerical problems with formulas and proper units. This is extremely helpful for mastering calculations and improving problem-solving speed.
Can an average student understand these solutions easily?
Yes, the solutions are written in simple and easy-to-understand language. Whether you're a beginner or need extra support, these answers break down complex concepts and help you learn Physics in a smooth and understandable way.
Where can I find Lakhmir Singh Solutions for Class 10 Physics – Electricity?
These solutions are available on various educational websites, apps, and learning platforms for free or as part of learning packages. You can also download PDFs or access them through your school's recommended digital resources.