12. Electricity

Description:

Score High with Handpicked Questions from One of the Most Important CBSE Chapters

Get exam-ready with this concise and powerful question bank from Chapter 12 – Electricity, based on the latest CBSE Class 10 Science syllabus. This PDF includes the most important, frequently asked, and exam-oriented questions — complete with answers, numericals, and circuit-based problems. Ideal for quick revision, practice, and scoring full marks in exams. 

Why Choose This Book?

✅ Strictly follows CBSE + NCERT guidelines

✅ Focuses on repeatedly asked questions in previous board exams

✅ Includes 1, 2, 3, and 5-mark questions, covering theory, application, and numericals

✅ Designed for concept clarity + exam performance

✅ Perfect for last-minute preparation

What You Will Learn?

✅ A compass needle is a small magnet. Its one end, which points towards north, is called a north pole, and the other end, which points towards south, is called a south pole.

✅ A magnetic field exists in the region surrounding a magnet, in which the force of the magnet can be detected. 

✅ Field lines are used to represent a magnetic field. A field line is the path along which a hypothetical free north pole would tend to move. The direction of the magnetic field at a point is given by the direction that a north pole placed at that point would take. Field lines are shown closer together where the magnetic field is greater.

✅ A metallic wire carrying an electric current has associated with it a magnetic field. The field lines about the wire consist of a series of concentric circles whose direction is given by the right-hand rule.

✅  The pattern of the magnetic field around a conductor due to an electric current flowing through it depends on the shape of the conductor. The magnetic field of a solenoid carrying a current is similar to that of a bar magnet.

✅ An electromagnet consists of a core of soft iron wrapped around with a coil of insulated copper wire.

✅ A current-carrying conductor when placed in a magnetic field experiences a force. If the direction of the field and that of the current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and will be given by Fleming’s left-hand rule.

✅ In our houses we receive AC electric power of 220 V with a frequency of 50 Hz. One of the wires in this supply is with red insulation, called live wire. The other one is of black insulation, which is a neutral wire. The potential difference between the two is 220 V. The third is the earth wire that has green insulation and this is connected to a metallic body deep inside earth. It is used as a safety measure to ensure that any leakage of current to a metallic body does not give any severe shock to a user.

✅ Fuse is the most important safety device, used for protecting the circuits due to short-circuiting or overloading of the circuits.

What's Inside the Book? 

34 Important Questions from Chapter 12: Electricity

1. Numerical Problems with detailed solutions

2. VI Graph-based and circuit diagram questions

3. Coverage of all key topics:

- Electric current & circuit

- Ohm’s Law and its verification

- Resistance and factors affecting it

- Series & parallel circuits

- Joule’s Law of heating

- Electric power and commercial unit calculations

4. Estimated study time: 3 hours

5. Format: Instant Digital PDF Download

Who Can Benefit from This Book?

✅ Class 10 CBSE students preparing for Board Exams

✅ Students who want quick revision before pre-boards or unit tests

✅ Parents and tutors looking for focused practice material

✅ Coaching centers providing exam prep for Class 10 students

How to Use This Book Effectively?

✅ Start Early: Use this PDF during revision week or after finishing the chapter in school.

✅ Practice by Weightage: Attempt 5-mark questions first, then move to short answers and 1-markers.

✅ Solve Numerical Separately: Treat them like mock test problems for speed and accuracy.

✅ Review Concepts: Use the answers section to revise formulas, diagrams, and definitions.

✅ Repeat with a Timer: Attempt selected questions again closer to exams, with a timer for better time management.

Frequently Asked Questions (FAQs)