What is solenoid? Solenoid is a cylindrical coil of wire which creates a magnetic field like a bar magnet when electricity flows in it. Why step-up transformer is used to transfer current for long distance? When current flows through a resistance, heat is generated and this is the loss fo electrical energy. This loss is … Read more
11.1 Electric Current 11.2 Relationship between Potential Difference and Electricity 11.3 Electric Power 11.4 Electric Supply 11.5 Safe Use of Electricity 11.6 Design of Circuit in Residence
1.1 Physics
Nature of Light What type of wave of light? Light is an electromagnetic wave. What is the wavelength of light? Wavelength of light is from 4тип10-7 m. The three major Properties of light The three major properties of light are given below: a) Light is a form of energy. b) Light is a kind of … Read more
Simple Harmonic Motion What is simple harmonic motion? The harmonic motion of constant amplitude in which the acceleration is proportional and oppositely directed to the displacement of the body from a position of equilibrium is called the simple harmonic motion. Why the vibrating motion of tuning fork is called oscillatory motion? We know, if a … Read more
What is thermometric properties of matter? Special properties of matter are used to measure the temperature. Some physical properties of substance change uniformly with the change of temperature. Using that physical property of substance temperature can be measured easily accurately and it is called the thermometric property of that substance. What are the thermometric properties … Read more
What is buoyancy? If a body is immersed partly or completely in liquid or gas a thrust acts vertically upward in it. This upward thrust is known as buoyancy. Write down the law of Pascal? External pressure applied to any portion of a liquid or gas enclosed in a container is equally transmitted in all … Read more
What is a transformation of energy? Energy changes from one state to another. This change is called the transformation of energy. What is a watt? If one-joule work is done in one second or the rate of transformation of energy is called a watt. Write down the dimension of energy. The dimension of energy is … Read more