NCERT Solutions Class 10 Science Chapter 13

NCERT Solutions Class 10 Science Chapter 13 – Magnetic Effects of Electric Current

NCERT Solutions Class 10 Science Chapter 13 is about the Magnetic Effects of Electric Currents. This chapter is one of the crucial chapters, and it carries a weightage of ten marks in the examination. Students will learn about electric current, magnetic fields, magnetic field lines, compass, electromagnetic induction, effects of electric current, etc. Board exams regularly pick five marks questions on Oersted’s law and his experiment. .

Extramarks is one of the leading online learning platforms for Science and Mathematics from Classes 1 to 12. Our academic research team has prepared the study materials based on the latest CBSE syllabus and as per the NCERT guidelines. Students can confidently rely on our learning solutions for their class assignments, tests and exam preparation.

NCERT Solutions Class 10 Science Chapter 13 provided by Extramarks will help students understand the concepts clearly about the chapter Magnetic Effects of Electric Current. Our NCERT solutions provide chapter-specific information containing chapter notes, important questions with solved answers, revision notes, past question papers, etc. NCERT Solutions always strive to impart experiential and steer away from rote learning by providing step-by-step explanations for making the concepts easy for students and even clarify their doubts via live classes. Students who have registered with Extramarks NCERT Solutions have shown significant improvement in their academic results. No wonder students have complete trust and faith in Extramarks. .

Key Topics Covered In NCERT Solutions Class 10 Science Chapter 13

Class 10 Science Chapter 13 NCERT Solutions is about the Magnetic Effects of Electric Current. When electrically charged particles in the conductor, such as electrons, come into motion, they generate a magnetic field. This phenomenon is called the electromagnetic effect or magnetic effect of electric current. A detailed study of the Magnetic Effects of Electric Current is given below.

For every concept included in our Class 10 Science NCERT Solutions Chapter 13, an explanatory note is prepared by Extramarks Science subject matter experts who give step-by-step explanations for making the concepts easy for students and even clarify their doubts via live classes.

Magnetic Effects Of Electric Current
As detailed in the Class 10 Science Chapter 13 NCERT Solutions, Electric current has two effects:

Heating effect
Magnetic effect

We have already learned about the heating effect of electric current in the ‘Electricity’ chapter. Electric current also generates a magnetic effect. A magnetic field is a force field generated by moving electric charges and magnetic dipoles, applied to other close-by moving charges and magnetic dipoles. A compass needle deflection activity illustrates the magnetic effects of current flowing in a wire.

Step 1: Place a straight copper wire perpendicular to the plane of paper between the points X and Y in an electric circuit,

Step 2. Take a small compass and place it horizontally near this copper wire. Check the position of the needle.

Step 3. Run the current through the electric circuit by inserting the key into the plug.

Step 4. Examine the change in the position of the compass needle.

Students can carry this experiment at their home by following the steps as given in our NCERT Solutions Class 10 Science Chapter 13.

Magnetic Field and Field Lines
A magnetic field is a region surrounding a magnet or a moving electric charge in which magnetism is felt. The magnetic field is a tool to describe how the magnetic force is distributed in the space around and within something magnetic in nature.

Symbol
B or H
Unit
Tesla
Base Unit
(Newton. Second)/Coulomb

Demonstration of Magnetic Field

The magnetic field can be demonstrated in two different ways as below:

Magnetic Field Vector:

Magnetic Field Vector is the mathematical description of the magnetic field.

A vector field is a group of many vectors drawn on a grid.

In the case of a compass, the vector points in the direction of a compass.

The length of the vector depends on the strength of the magnetic force.

Magnetic Field Lines: Magnetic field lines indicate the direction of the magnetic force on a north monopole at any given point.

The solidity of the field lines indicates the magnitude of the field.

The magnetic field is more substantial and crowded near the magnetic poles.

Moving away from the bars weakens the magnetic field, making the lines less crowded.

The other properties include, magnetic field lines never crossing each other.

Magnetic field lines always make closed-loops.

Magnetic field lines always start from the north pole and end at the south pole.

The picture below shows the magnetic field lines:

The concept of magnetic field lines and magnetic field vectors is thoroughly explained with the help of visual diagrams and detailed explanations for students which help in shaping their minds to absorb more complex topics in higher classes. Refer to our NCERT Solutions Class 10 Science Chapter 13 which is available on Extramarks’ website and take a moment to explore a repository of study materials available to supplement your learning.

Magnetic Field Intensity
Magnetic field intensity is represented as Vector H and defined as the ratio of the MMF needed to create a certain Flux Density (B) within a particular material per unit length of that material.

The formula is H = B/μ – M, where B is the magnetic flux density, M is the magnetisation, and μ is the magnetic permeability.

Magnetic Field Due To A Current-Carrying Conductor
As we know, a magnetic field is produced whenever an electrical charge is in motion. Take a conducting wire and connect it to a battery. With the increasing current in the wire, the magnetic field also increases. Moving away from the wire results in a decrease in the magnetic field. This phenomenon is important for students to understand and to feed their insatiable curiosity we recommend they refer to our NCERT Solutions Class 10 Science Chapter 13.

According to Ampere’s law, the equation gives the magnetic field at a distance r from a long current-carrying conductor I.
B=μ0I2πr

In the equation, μ0 is a particular constant known as the permeability of free space.
μ0 = 4π*10-7 T. m/A

Force On A Current-Carrying Conductor In A Magnetic Field
An electrically charged conductor produces a magnetic field around it. i.e. behaves like a magnet and exerts a force when placed in its magnetic field. Similarly, the magnetic field also exerts equal and opposite forces on the current-carrying conductor.

When two magnetic fields (the magnetic field produced by the current-carrying conductor and the magnetic field due to the nearby magnet) interact, attraction or repulsion can occur between them. This attraction and repulsion are based on the direction of the external magnetic field and the current in the conductor.

Suppose the direction of the flow of the magnetic field and the electric current are perpendicular to each other. The force acting on the conductor is vertical to both the current and magnetic field. A conductor is placed between a horseshoe magnet’s north and south poles with an upward magnetic field and is connected to the battery, as depicted in the sketch below. When electricity is passed through the conductor by switching on the plug key, the conductor moves away from the horseshoe magnet, indicating that the force from the magnet is acting on the conductor. Now, suppose the polarity of either battery or the horseshoe magnet is reversed, and the electric current is passed. In that case, the conductor will move towards the magnet, indicating that the force’s direction is reversed.

Fleming’s left-hand rule is beneficial in determining the direction of the force. The left hand is stretched so that the forefinger, the center finger, and the thumb are in perpendicular directions.

According to the rule, the forefinger and the center finger of a stretched left-hand point in the direction of the magnetic field and the electric current, respectively, while the thumb points in the direction of motion of force acting on the conductor.

Students will find a few questions in exams related to the application of Fleming’s left-hand rule. They can find more real-life applications and use cases in our NCERT Solutions Class 10 Science Chapter 13.

Electric Motor
An electric motor is a revolving device that converts electrical energy to mechanical energy.

A simple electric motor consists of the following parts:

A power supply: Usually has DC for a simple motor. Provides power to the motor armature or field coils.

Field Magnet: Produces a torque on the armature coil under Fleming’s left-hand rule.

An Armature or rotor Holds the armature coil in place and provides mechanical support.

Commutator: It is the rotating interface of the armature coil with a stationary circuit.

Brushes: These devices conduct current between static wires and moving parts, most commonly the rotating shaft.

Working Principle of An Electric Motor:

The working of an electric motor depends on the fact that an electrically charged conductor produces a magnetic field around it.

For example:
Take two magnetic bars and keep the poles facing each other in a small space. Take a small length of an electric wire and make a loop. Place this loop in between the bar magnets such that it is still within the field of impact of the magnets. In the end, link the ends of the loop to a battery. Once electricity flows through the circuit, the magnetic field of the magnets interferes and, in turn, makes the loop move. As the loop has become a magnet now, one of the sides will be attracted to the north pole and the other to the magnet’s south pole.

Types of Electric Motor:

Electric motors are available in three main divisions:

AC motor.

DC motor.

Special purpose motors.

Image Source: NCERT Textbook

Uses of an Electric Motor:

Electric motors are used in numerous applications. Some of them are listed below:

1. Drills.

2. Water Pumps.

3. Hard Disc Drives.

4. Washing Machines.

5. Industrial Equipment.

Electric motors, their working, their applications and different types of motors are further discussed at length in our NCERT Solutions Class 10 Science Chapter 13. Students can sign up at Extramarks’ website and get full access to these study resources.

Electromagnetic Induction
Electromagnetic induction is the current produced because of voltage production due to a changing magnetic field around a fixed conductor or conductor moving inside a magnetic field.
English physicist Michael Faraday first discovered this in 1831.

Some of the discoveries of the factors influencing voltage production are:

1. Number of Coils:

The produced voltage is directly proportional to the wire coils. The greater the number of turns, the greater the voltage produced.

2. Changing Magnetic Field:

Changing the magnetic field affects the induced voltage.

Electromagnetic Induction Formula is e = N × dΦ / dt

Where e is the induced voltage (in volts), N is the number of turns in the coil, Φ is the magnetic flux – the amount of magnetic field at a surface (in Webbers), and t is the time (in seconds).

Applications of Electromagnetic Induction:

1. AC generators function on the principle of electromagnetic induction.

2. The working of electrical transformers is based on electromagnetic induction.

3. The magnetic flow metre is based on electromagnetic induction.

Electric Generator
As explained in our NCERT Solutions Class 10 Science Chapter 13, the electric generator is the electric machine that converts mechanical energy into electrical energy. Generators do not produce electricity; instead, it uses the mechanical energy supplied to them to force the movement of electric charges present in the wire of its windings through an external electric circuit. This flow of electrons constitutes the output electric current supplied by the generator.

Types of Electric Generators:

1. AC generators:

AC generators are single-phase generators and are limited to 25 kW.

2. DC generators:

These generators are divided into three categories:

Shunt: Shunt generators are used in battery chargers.

Series: Series generators are used in street lights.

Compound-wound: Most of the DC generators are compound-wound.

Uses of an Electric Generator:

1. They supply the power for most power networks across cities.

2. Small-scale generators provide a good backup for household power needs or small businesses.

3. At construction sites, before the power is set up, they extensively use electric generators.

4. Energy-efficient, as fuel consumption is reduced drastically.

5. Since they give a voltage output range, they are used in labs.

6. They are used to drive motors.

7. They are used in transportation.

There are many other uses and applications of electric generators that we have covered in our NCERT Solutions Class 10 Science Chapter 13.

Domestic Electric Circuits
The two types of Electric circuits are:

Parallel circuit.

Series circuit.

Electrons in the parallel circuit flow in many directions. Different branches connect individual parts of the circuit. If a circuit breaks in one direction, electric current flows in another direction.

In the series circuit, electrons flow in a single direction. Circuits can be opened or closed at one time. If the circuit breaks, no current flows in the circuit.

Electricity to homes is supplied through two types of cables:

Overhead cables.

Underground cables.

Three types of wires in domestic electric circuits are Earth wire(green colour), Live wire(red colour), and Neutral wire(black colour).

NCERT Solutions Class 10 Science Chapter 13: Exercises & Solutions

NCERT Solutions Class 10 Science Chapter 13 -Magnetic Effects of Electric Current, provided by Extramarks, covers all essential topics from the examination point of view. The solutions are prepared by experienced subject matter experts after a lot of research and analysis to provide authentic and reliable study material to students. Students can study chapter theories and also attempt various questions such as MCQs, short and long answer questions from our NCERT solutions. Students may refer to a repository of questions in NCERT Solutions Class 10 Science Chapter 13 – Magnetic Effects of Electric Current by clicking below.

NCERT Solutions – Short-answer Questions
NCERT Solutions – MCQ’s
NCERT Solutions – Long-answer Questions

As mentioned earlier Extramarks has plenty of study resources from Classes 1 to 12. Students may access NCERT Solutions for any class and subject by clicking on the respective links below:

NCERT Exemplar Class 10 Science

NCERT Exemplar Class 10 Science Chapter 13 is one of the most acceptable studies and practice materials developed by experienced faculty. . In Science, it’s very important for students to understand the concepts and fundamentals of each topic. Once the fundamental concepts are clearly understood it becomes easy to understand these topics in higher classes. Students need to get acquainted with all types of questions to score good marks. By practising these advanced-level questions thoroughly, students get a good knowledge of all the concepts of this chapter, analyze their limitations and overcome them before facing the board examinations, and prepare well for competitive examination such as NEET, JEE, and other technical exams.
Furthermore, students can refer to the Exemplar problem and Solutions for Class 10 Science Chapter wise on the Extramarks’ website to master the topic and continue the process of learning with excellent academic results.

NCERT Solutions Class 10 Science -Exemplar Questions and Answers

Key Features of NCERT Solutions Class 10 Science Chapter 13
Extramarks platform is known for providing the most accurate and high-quality educational materials for all Classes from 1 to 12. . We have an in-house research and development team which meticulously follows the NCERT textbooks and CBSE guidelines to provide authentic and reliable study resources for students.. Today lakhs of students have complete faith and trust on Extramarks for their tests, assignments and exams.

The Benefits of NCERT Solutions Class 10 Science Chapter 13 include:

Includes all concepts from the CBSE syllabus and is based on the most recent NCERT 2021-22 pattern.
The answers present extensive and pertinent information clearly and concisely.
It assists students in reinforcing their fundamentals, making it easier for them to comprehend more complicated and difficult concepts. .
Time management, problem-solving, and analytical skills all can be developed by students.
NCERT Solutions, Extra questions help students to get a better hold on the subject. It helps them to solve any tricky questions with ease and fetch more marks in the examinations.
NCERT Solutions Class 10 Science Chapter 13 provides well-explained solutions to all the in-text and end-text questions in the textbook. Every student registered with Extramarks can access various study materials on all subjects and boost their performance.
The tough questions in between chapters encourage students to think outside the box to be able to apply the concepts acquired in the chapter in real life. Extramarks doesn’t believe in rote learning, in fact, it follows the latest CBSE guidelines to provide experiential learning to students