Magnetic Effect of Electric Current Class 10 Notes Science Chapter 13

 Magnetic Effect of Electric Current Class 10 Notes CBSE Science Chapter 13

CBSE NCERT Class 10 Notes Science contains physics, chemistry and biology notes of chapter 13 Magnetic Effect of Electric Current given in textbook are part of Revision Notes for Class 

Science Notes cover an overview of the main given points of every concepts and Topics in the NCERT TextBooks Class 10th Science this Chapter Notes includes topic/concepts wise explanations for all the topic provided in the book such as Electric Field , Permanent and Temporary Magnet , magnetic Field, Direct Current and Alternating Current

CBSE Class 10 Chapter-wise Science Notes

Well prepared Class 10th Science Notes will guidance students understand the topics ,concepts and themes covered in all the chapters of Ncert Text book of 10th 


Magnetic Effect of Electric Current Class 10 Notes


A substance that attracts iron or iron like 


Properties of Magnet

- Every magnet has two poles i.e. North and South.

- Like poles repel each other.

- Unlike poles attract each other.

- A freely suspended bar magnet aligns itself in nearly north-south 

direction, with its north poles towards north direction.



Magnetic Field

The area around a magnetic in which its magnetic force can be


- Its SI unit is Tesla (T).

- Magnetic field has both magnitude and direction.

- Magnetic field can be described with help of a magnetic compass.

- The needle of a magnetic compass is a freely suspended bar


Characteristics of Field Lines

- Field lines arise from North pole and end into South pole of the


- Field lines are closed curves.

- Field lines are closer in stronger magnetic field.

Field lines never intersect each other as for two lines to intersect,

there must be two north directions at a point, which is not


- Direction of field lines inside a magnet is from South to North.

- The relative strength of magnetic field shown by degree of

closeness of field lines.

Right Hand Thumb Rule

Imagine you are holding a current carrying straight conductor in your

right hand such that the thumb is pointing towards the direction of

current. Then the fingers wrapped around the conductor give the

direction of magnetic field

Magnetic Field due to Current Through a Straight Conductor

- It can be represented by concentric circles at every point on


- Direction can be given by right hand thumb rule or compass.

- Circles are closer near the conductor.

- Magnetic field ∝ Strength of Current

- Magnetic field ∝


Distance from


Magnetic Field due to a Current through a Circular Loop

- It can be represented by concentric circle at every point.

- Circles become larger and larger as we move away.

- Every point on wire carrying current would give rise to magnetic

field appearing as straight line at center of the loop.

- The direction of magnetic field inside the loop is same.

Factors affecting magnetic field of a circular current carrying


- Magnetic field ∝ Current passing through the conductor

- Magnetic field ∝


Distance from conductor

- Magnetic field ∝ Number of turns in the coil

Magnetic field is additive in nature means magnetic field of one loop

adds up to magnetic field of another loop. This is because the current

I each circular turn has same direction


A coil of many circular turns of insulated copper wire wrapped closely

in a cylindrical form.

- Magnetic field of a solenoid is similar to that of a bar magnet.

- Magnetic field is uniform inside the solenoid and represented by

parallel field lines.

- Direction of magnetic field

i) Outside the solenoid: North to South

ii) Inside the solenoid: South to North

- Solenoid can be used to magnetize a magnetic material like soft iron.

Types of Magnets

 Permanent Magnet

Force on a Current carrying Conductor in a Magnetic Field

- Andre Marie Ampere suggested that the magnet also exerts an

equal and opposite force on a current carrying conductor.

- The displacement in the conductor is the maximum when the

direction of current is at right angle to the direction of magnetic


- Direction of force is reversed on reversing the direction of



1) It is a temporary magnet, so it

can be easily demagnetized.

2) Strength can be varied.

3) Generally strong magnet.

4) Poles can be reversed.

(matlab North pole ko South or

South pole ko North pole bna skte

h/ Poles ko reverse kiya ja skta h)

1) Can’t be easily demagnetized.

2) Strength is fixed.

3) Generally weak magnet.

4) Poles can’t be reversed 

Types of Current

 Direct Current

1) The current which doesn’t

reverse its direction.

2) DC can’t be transferred to

long distances.

3) DC can be stored in Batteries.

4) Frequency is always Zero.

5) This only move in one

direction – that is forward.

6) Sources of DC are Cell,

Battery etc.

Our TV remote works on

Alternating Current

1) The current which reverses

its direction periodically.

2) AC can be transmitted to long


3) This can’t be stored in


4) The frequency of AC is never


5) AC keep changing their

directions – backward and


6) Our TV, Fridge works through

Alternating Current

Domestic Electric Circuits

- There are three kinds of wires used:

(i) Live Wire (positive) with red

insulation cover.

(ii) Neutral wire (negative) with

black insulation cover.

(iii) Earth wire with green

insulation cover.

The Potential difference between Live and Neutral wire in India is 220


Pole → Main supply → Fuse → Electricity meter → MCB → To separate


 Electric Pole

 Electric Meter Main Switch

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