### Chapter 18: Gravitational Force

Gravitational field It is a region of space where a mass experiences a force. Newton’s law of gravitation It states

### Chapter 17: Circular Motion

Angular Displacement θThe angle θ, through which the object has moved is known as its angular displacement. θ=arc/radius = s/r

Rutherford’s Scattering Experiment Hans Geiger and Ernest Marsden worked with Ernest Rutherford in his Manchester laboratories in 1909. They fried

### Chapter 15: Stationary Waves

Stationary / Standing WavesWhen two similar waves travel in opposite directions they can superpose to form stationary wave.  This usually

### Chapter 14: Super Position of waves

Principle of superposition of waveThe idea that we can find the resultant of two waves which meet at a point

### Chapter 13: Waves

Waves All waves are caused by oscillations and all transfer energy without transferring matter. This means that a water wave

### Chapter 12: Practical Circuits

Internal Resistance (r) Internal resistance is the chemical inside the cell that offers a resistance to the flow of current.

### Chapter 11: Resistance and Resistivity

Ohm’s Law A conductor obeys Ohm’s law if the current in it is directly proportional to the potential difference across