Differences between valve and transistor
S.N. Valve Transistor 1. Also known as vacuum tube or electron tube or tube, valve is a device that controls the flow of electric current […]
Physics
Generator, its working principle and its types
A generator is a machine which converts mechanical energy into electrical energy. It consists of a coil moving in a magnetic field. As the coil […]
Radioactivity (Radioactive decacy), its types and properties of different radioactive rays
The naturally occurring elements like Uranium, Polonium, Radium etc. constantly undergo a spontaneous change with the emission of different radioactive rays. This phenomenon of emission […]
Lighting effect of electric current; Filament lamp and Fluorescent lamp
When electric current flows through the conductor of high resistance, first it becomes very hot and then glows to emit light. This is called the […]
Transformer (Working Principle, Structure and Types)
A transformer is a device that converts high voltage AC to low voltage AC of the same frequency and vice versa. It works on the […]
Wave, its types and characteristics
Wave motion and wave: A wave motion is a kind of disturbance which is transferred from one part of the medium to another part due […]
Types of simple Machine
There are six types of simple machine Lever Pulley Wheel and axle Inclined plane Wedge Screw Lever A lever is a rigid bar (straight or […]
Simple machines and some important terms related to them
A simple machine is a device which makes our work easier, quicker and convenient. A simple machine consists of very few parts, by means of […]
Some important science questions
A. Knowledge Type Questions: What is meant by freefall? What is the value of ‘g’ on: i) the surface of the moon ii) the equator […]
Electric bell (Construction and working mechanism)
An electric bell is a device in which to and fro movement of a smaller hammer on a gong produces the sound of a bell. […]