**Physics Formula ICSE 10** Class Standard Chapter-Wise. Applicable in All publications of **ICSE** Class-**10** **Physics**. **Formula** of **ICSE** **Physics** Class **10** is very important to solve the problems. Concise Selina Publishers Physics Formula for ICSE Class 10. we advice you to view ICSE class-10 mathematics formula chapter-wise.

**Physics Formula ICSE 10 Class Standard Chapter-Wise**

**Important unit is given for ICSE Class 10 Physics Formula Topics. **

**Chapter -1 Force**

**Chapter-2 Work Power energy**

**Chapter-3 Machines**

**Inclined Plane and Gear (Not n syllabus-2021)**

**Chapter-4 Refraction of Light at plane surface**

Refractive Index = (Speed of Light in Vacuum)/(Speed of Light In Medium)

Delta δ=(i¹ + i²) – (r¹ +r²)

r¹ +r² =A

i¹ + i² =A + δ

δ(min) = 2 i-A

** Chapter-5 Refraction through a lens**

**Sign Convention**

The axis along which the distances are measured is called as the principal axis. These distances are measured from the optical centre of the lens.

All the distances which are measured along the direction of the incident ray of the light are taken positive, while the distances opposite to the direction of the incident ray are taken as negative.

and All the lengths that are measured above the principal axis are taken positive, while the length below the principal axis is considered negative.

The focal length of the convex lens is taken positive and that of concave lens is negative.

(Derivation of Lens formula not in syllabus-2021)

where The distance of the object from the optical centre is called the object distance (u).

and The distance of the image from the optical centre is called the image distance (v).

The distance of the principal focus from the optical centre is called the focal length (f).

**Magnification** ‘m’ is the ratio of the height of the image to the height of the object.

**Magnification** ‘m’ = ( Hight of Image)/ ( hight of Object)

**Magnification** ‘m’ = -v / u

Power of lens = 1 / focal length (in Metre)

**Chapter-7 Sound**

**Chapter-8 Current Electricity**

**Chapter-9 Household Circuits**

**Chapter-10 electro-magnetism (Not in syllabus-2021)**

** ****Right hand thumb rule** determines the direction of magnetic field around a current carrying wire.

It states that if we hold the current carrying conductor in right hand such that the thumb points in the direction of flow of current, then the fingers encircle the wire in the direction of the magnetic fields lines.

**Chapter-11 Calorimetry**

**(Numericals on specific heat is in syllabus-2021 but Numericals ****on Latent heat is not in syllabus-2021)**

**Chapter-12 Radioactivity**

Atomic Number (Z) = Number of Proton = Number of Electron (if atom is neutral)

**To calculate atomic mass**

Atomic Mass (A) = Mass of Nucleus

Atomic Mass (A) = Number of Proton + Number of Neutron

Atomic Mass (A) = Number of Electron + Number of Neutron

Atomic Mass (A) = Atomic Number (Z) + Number of Neutron

** To calculate neutron**

Number of Neutron = Atomic Mass (A) – Atomic Number (Z)

Number of Neutron = Atomic Mass (A) – Number of Proton

Number of Neutron = Atomic Mass (A) – Number of Electron

Law of Emission

When an **An alpha** particle emmit :the atomic number decreases by 2 and mass number decreases by 4 in new element.

When **A beta** particle emmit : The atomic number increases by one, but mass number does not change in new element .

**Gamma particle:** it does not change anything in the nucleus

**Nuclear Energy**

(Nuclear fission and nuclear fusion Exercise of Radioactivity is not in syllabus-2021)

1 amu = 931 MeV

E = mc² where m is mass and c is velocity of light

1 Kg Mass = 9×10^{16} j or 2.5 x 10^{10 KW H}

–: End of Physics Formula for ICSE class-10 Chapter-Wise :–

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