Photo electric effect

The photoelectric effect The photoelectric effect is the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light.A material that can exhibit The photoelectric effect is said to be photoemissive, and the ejected electrons are called photoelectrons. The process was discovered by Heinrich Hertz in 1887. Attempts to … Read more Photo electric effect

Source of solar energy, causes of origin of energy in the Sun, solar heating devices, solar cooker solar cell

Solar Energy : Source, Solar heating devices, solar cooker solar cell   Sunlight is Earth’s most abundant energy source and is delivered free of charge. Indeed, the energy from sunlight reaching the land surface of the earth  is thousands of times greater than the world’s current total annual consumption of energy. Yet harnessing sunlight’s energy content directly—rather than … Read more Source of solar energy, causes of origin of energy in the Sun, solar heating devices, solar cooker solar cell

Electric current Ohm’s law and Resistance

Electric current Ohm’s law and Resistance   Electrical current is the flow of charged particles. The flow of charges will be constant in current electricity. Electric current flows from higher electric potential to lower electric potential. For the current to flow, it requires a circuit which is closed loop of a conducting material. The circuit … Read more Electric current Ohm’s law and Resistance

Precautions observed in electric experiments and Chemical effects of electric current

precautions observed in electric experiments and Chemical effects of electric current When it comes to working with electrical equipment, putting safety precautions in place for any electrical project is always a top priority. From basic knowledge and equipment safety to personal precautions and equipment performance, knowing what to do to help prevent injuries and ensure … Read more Precautions observed in electric experiments and Chemical effects of electric current

Thermal effect of current it’s use, calculation of power and electrical energy

Thermal effect of current it’s use, calculation of power and electrical energy Spent When an electric current flows through a conductor, electrical energy is expended n over coming the frictional resistance between eh electrons and the molecules of the wire. If potential difference of V volts is applied across a conductor and current of I … Read more Thermal effect of current it’s use, calculation of power and electrical energy

Electricity and its effects -electric intensity, potential, potential difference

Electricity and its effects -electric intensity, potential, potential difference Electricity is the physical flow of electrons, referred to as an electrical current. Electricity is an energy carrier that efficiently delivers the energy found in primary sources to end users, who in turn convert it into energy services. Electricity can be created in three ways: The … Read more Electricity and its effects -electric intensity, potential, potential difference

Electric discharge in gases, discharge tube, cathode rays, X-rays and their properties

Electric discharge in gases Electrical discharge through gases is studied by using a specially designed glass tube commonly called as a discharge tube. It consists of a cylindrical glass tube having a side tube, and two metallic electrodes one at each end. These electrodes can be connected to the respective terminals of a high tension … Read more Electric discharge in gases, discharge tube, cathode rays, X-rays and their properties

Ray optics

Ray optics Nature of light Light is a transverse, electromagnetic wave that can be seen by humans. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization. Light is produced by … Read more Ray optics