## 07. Gravitation

[spoiler title=”Gravitational Field” open=”yes”] Newton’s Law of Gravitation states that the gravitational force between two point masses is directly proportional to the product of their masses and inversely proportional to the square of their separation, i.e. $$F_G=\dfrac{Gm_1m_2}{r^2}$$ where G is… Continue Reading

## 14. D.C. Circuits

The Potential Divider Rule Determining the relative brightness of light bulbs using the potential divider rule How Internal Resistance affects brightness of light bulbs

## 16. Electromagnetic Induction

How emf is induced Electromagnetic Induction and its Effects To explain a phenomenon that happens due to Electromagnetic Induction, we can use an acronym CFILE to structure our answer. C stands for cutting of flux or changing of flux linkage.… Continue Reading

## 17. Alternating Currents

The root-mean-square value of an alternating current is equivalent to the steady direct current that would dissipate heat at the same rate as the alternating current in a given resistor. For a sinusoidal source, (a) the root mean square value… Continue Reading

## 20. Nuclear Physics

The Nucleus existence and size demonstrated using the Rutherford $$\alpha$$-scattering experiment. consists of nucleons (protons and neutrons) isotopes of an element share the same number of protons but different number of neutrons. Nuclear Reactions nuclear reactions involve two or more… Continue Reading

## 19. Lasers and Semiconductors

LASER This flow chart shows the requirements expected of students when describing how light is produced using LASER (Light Amplification by Stimulated Emission of Radiation).   BAND THEORY Energy bands are formed in solids where there are multiple atoms, each… Continue Reading