Physics Tutor in Mussafah Abu Dhabi for CBSE, ICSE, IGCSE, IB, A-Level, AP Physics, NEET and IIT JEE by Kumar Physics Classes

Physics Tutor in Mussafah +91-9958461445

If you live in Mussafah, Abu Dhabi, and Physics is becoming difficult for you, then you are not alone. Many students study in good schools, attend regular classes, make notes, and still feel that Physics is not entering the mind properly. The real problem is not always hard work. The real problem is concept clarity.

Physics is a subject where memorising formulas is not enough. A student must understand why a formula is written, how it is derived, where it is applied, and what sign convention or direction is being used. This is why many students score well in other subjects but struggle badly in Physics.

At Kumar Physics Classes, Kumar Sir focuses on concept-based Physics teaching for CBSE, ICSE, IGCSE, IB, A-Level, AP Physics, NEET and IIT JEE students. If you are searching for a Physics Tutor in Mussafah, Kumar Sir can help you understand Physics from the basic level to advanced level.

Contact Kumar Physics Classes
Phone / WhatsApp: +91-9958461445
Website: https://kumarphysicsclasses.com
Email: kumarsirphysics@gmail.com

Why Physics Feels Difficult for Many Students in Mussafah

Many students feel that they understand Physics in class, but when numerical questions come, they become confused. This happens because Physics needs three things together:

Concept clarity
Formula understanding
Correct application in numerical problems

For example, in current electricity or magnetism, students may remember the formula but forget the direction of force, field, current, or length vector. In mechanics, they may remember equations but do not understand free body diagrams. In optics, they may remember lens formula but fail in sign convention.

This is where a good Physics tutor becomes important.

If you are living in Mussafah and preparing for CBSE Board, NEET, IIT JEE, AP Physics, IB Physics, IGCSE Physics or A-Level Physics, you need a teacher who can explain Physics in simple language with proper derivation, diagram and numerical practice.

Physics Tutor in Mussafah for CBSE, NEET, IIT JEE and International Curriculum

Kumar Physics Classes provides online Physics classes for:

CBSE Physics Tutor in Mussafah
NEET Physics Tutor in Mussafah
IIT JEE Physics Tutor in Mussafah
AP Physics Tutor in Mussafah
IB Physics Tutor in Mussafah
IGCSE Physics Tutor in Mussafah
A-Level Physics Tutor in Mussafah
ICSE Physics Tutor in Mussafah

Students can attend online classes from Abu Dhabi, Dubai, Sharjah, Mussafah, Khalifa City, Mohammed Bin Zayed City, Deira, Jumeirah, Business Bay and other UAE locations.

Force Between Two Parallel Current Carrying Conductors

Now let us understand one very important concept from Magnetic Effect of Current: force between two long parallel current carrying conductors.

Suppose two long straight parallel conductors are kept at distance r from each other.

Current in first conductor = I1
Current in second conductor = I2
Distance between conductors = r
Length of conductor considered = L

Magnetic field produced by first conductor at the position of second conductor is:

B = μ0 I1 / (2πr)

Now force on second conductor due to this magnetic field is:

F = B I2 L

Putting value of B:

F = (μ0 I1 / 2πr) I2 L

So,

F = μ0 I1 I2 L / 2πr

Force per unit length:

F / L = μ0 I1 I2 / 2πr

This is the formula for force per unit length between two long parallel current carrying conductors.

Nature of Force

If currents are in the same direction:

The conductors attract each other.

If currents are in opposite directions:

The conductors repel each other.

Kumar Sir style simple line:

Same direction current means attraction.
Opposite direction current means repulsion.

Definition of One Ampere

One ampere is defined using the force between two parallel current carrying conductors.

If two long straight parallel conductors are placed one metre apart in vacuum and the same current flows through both conductors, then if the force per unit length between them is:

2 × 10^-7 N/m

then the current flowing in each conductor is called:

1 ampere

Mathematically:

F / L = μ0 I1 I2 / 2πr

For definition of one ampere:

I1 = I2 = 1 A
r = 1 m
μ0 = 4π × 10^-7 T m A^-1

So,

F / L = (4π × 10^-7 × 1 × 1) / (2π × 1)

F / L = 2 × 10^-7 N/m

Therefore, one ampere is that current which, when flowing through each of two long parallel conductors placed one metre apart in vacuum, produces a force of 2 × 10^-7 N per metre between them.

Significance of This Definition

This definition is very important because it connects electricity and magnetism. It shows that current is not just flow of charge; current also produces magnetic field and magnetic force.

Important points:

Current produces magnetic field.
Magnetic field applies force on another current carrying conductor.
Direction of force depends on direction of current.
This concept is used in motors, electromagnets, measuring instruments and many practical devices.
It helps students understand why magnetic effect of current is a very important chapter in CBSE and NEET Physics.

Why Students Make Mistakes in This Topic

Students usually make these mistakes:

They forget that magnetic field due to wire is circular.
They confuse attraction and repulsion.
They forget force per unit length formula.
They do not understand why one ampere is defined using two wires.
They do not apply right hand thumb rule properly.
They remember formula but forget physical meaning.

Kumar Sir teaches this topic with diagrams, direction rules and step-by-step derivation so that students do not just memorise but actually understand the concept.

Contact Kumar Physics Classes

If you live in Mussafah and Physics is not clear, you can contact Kumar Sir for online Physics classes.

Kumar Physics Classes
Phone / WhatsApp: +91-9958461445
Email: kumarsirphysics@gmail.com
Website: https://kumarphysicsclasses.com

Physics becomes easy when the teacher explains from zero level, builds the concept slowly, gives proper examples, and then makes the student practise numerical questions. That is the method followed at Kumar Physics Classes.

Magnetic Effect of Current – Important Principles and Magnetic Properties

1. Magnetic Effect of Current

When electric current flows through a conductor, it produces a magnetic field around it. This is called the magnetic effect of current.

Simple Kumar Sir style:

Current flows → magnetic field is produced.
Moving charge creates magnetism.

Examples:

Current carrying wire behaves like a magnet.
Solenoid behaves like a bar magnet.
Electromagnet works on magnetic effect of current.
Electric motor, galvanometer and speaker work on this principle.

2. Biot-Savart Law

Biot-Savart law gives the magnetic field produced by a small current element.

If a small current element Idl produces magnetic field dB at a point P, then:

dB = (μ0 / 4π) × (I dl sinθ) / r²

Where:

I = current
dl = small length element
r = distance of point from current element
θ = angle between dl and r
μ0 = permeability of free space

Principle of Biot-Savart Law

The magnetic field due to a current element:

is directly proportional to current I
is directly proportional to length element dl
is directly proportional to sinθ
is inversely proportional to square of distance r²

So:

dB ∝ I
dB ∝ dl
dB ∝ sinθ
dB ∝ 1/r²

Important Concept

If point lies on the axis of current element:

θ = 0°
sinθ = 0
dB = 0

If point lies perpendicular to current element:

θ = 90°
sinθ = 1
dB is maximum

3. Magnetic Field Due to Straight Current Carrying Wire

For a long straight current carrying wire:

B = μ0 I / 2πr

Where:

B = magnetic field
I = current
r = perpendicular distance from wire

Direction is given by Right Hand Thumb Rule.

If thumb shows direction of current, curled fingers show direction of magnetic field.

4. Magnetic Field at Centre of Circular Coil

For a circular coil of radius R carrying current I:

B = μ0 I / 2R

For N turns:

B = μ0 N I / 2R

Magnetic field increases when:

current increases
number of turns increases
radius decreases

5. Magnetic Field Inside Solenoid

For a long solenoid:

B = μ0 n I

Where:

n = number of turns per unit length
I = current

Inside a long solenoid, magnetic field is:

strong
uniform
parallel to axis
almost like field inside a bar magnet

6. Force on a Moving Charge in Magnetic Field

When a charge q moves with velocity v in magnetic field B, force is:

F = qvB sinθ

If velocity is perpendicular to magnetic field:

θ = 90°
F = qvB

If velocity is parallel to magnetic field:

θ = 0°
F = 0

This is why charged particle moves in a circular path when it enters perpendicular to magnetic field.

7. Force on Current Carrying Conductor

A current carrying conductor placed in magnetic field experiences force:

F = BIL sinθ

Where:

B = magnetic field
I = current
L = length of conductor
θ = angle between current and magnetic field

Maximum force:

θ = 90°
F = BIL

Zero force:

θ = 0°
F = 0

8. Principle of Moving Coil Galvanometer

A moving coil galvanometer works on the principle that:

When a current carrying coil is placed in a magnetic field, it experiences torque.

Torque on the coil is:

τ = N B I A

Where:

N = number of turns
B = magnetic field
I = current
A = area of coil

Restoring Torque

The spring provides restoring torque:

τ = kθ

At equilibrium:

NBIA = kθ

So:

θ = (NBA / k) I

Therefore:

θ ∝ I

This means deflection is directly proportional to current.

Important Line

Moving coil galvanometer is used to detect and measure small current.

9. Conversion of Galvanometer into Ammeter

A galvanometer is converted into ammeter by connecting a low resistance called shunt resistance in parallel.

Ammeter = Galvanometer + Low resistance in parallel

Ammeter has very low resistance.

10. Conversion of Galvanometer into Voltmeter

A galvanometer is converted into voltmeter by connecting a high resistance in series.

Voltmeter = Galvanometer + High resistance in series

Voltmeter has very high resistance.

11. Magnetic Properties of Materials

Materials are classified into three main types:

Diamagnetic materials
Paramagnetic materials
Ferromagnetic materials

12. Diamagnetic Materials

Diamagnetic materials are weakly repelled by magnetic field.

Examples:

Bismuth, Copper, Gold, Silver, Water

Properties:

Weakly repelled by magnet
Magnetic susceptibility is small and negative
Relative permeability is slightly less than 1
They do not retain magnetism
Magnetic field inside them becomes slightly weaker

χ < 0
μr < 1

Example:

Water is diamagnetic.

13. Paramagnetic Materials

Paramagnetic materials are weakly attracted by magnetic field.

Examples:

Aluminium, Platinum, Chromium, Oxygen

Properties:

Weakly attracted by magnet
Magnetic susceptibility is small and positive
Relative permeability is slightly greater than 1
They do not retain magnetism strongly
Magnetisation is in the direction of applied field

χ > 0
μr > 1

14. Ferromagnetic Materials

Ferromagnetic materials are strongly attracted by magnetic field.

Examples:

Iron, Cobalt, Nickel, Steel

Properties:

Strongly attracted by magnet
Magnetic susceptibility is very large and positive
Relative permeability is very high
Can retain magnetism
Used to make permanent magnets and electromagnets

χ >> 1
μr >> 1

15. Difference Between Dia, Para and Ferro Materials

Property	Diamagnetic	Paramagnetic	Ferromagnetic
Attraction/Repulsion	Weakly repelled	Weakly attracted	Strongly attracted
Susceptibility	Negative	Small positive	Very large positive
Relative permeability	Less than 1	Slightly greater than 1	Very high
Examples	Copper, water, bismuth	Aluminium, oxygen	Iron, cobalt, nickel
Retains magnetism	No	No	Yes
Field inside material	Slightly decreases	Slightly increases	Greatly increases

16. Important Kumar Sir Style Summary

Diamagnetic means weak repulsion.
Paramagnetic means weak attraction.
Ferromagnetic means strong attraction.

Current produces magnetic field.
Moving charge produces magnetism.
Moving coil galvanometer works on torque.
Biot-Savart law gives magnetic field due to current element.

If charge moves parallel to magnetic field, force is zero.
If charge moves perpendicular to magnetic field, force is maximum.