August 04, 2021
Till the poles near houses, electricity reaches through the distribution system. Two wires from the poles come to the houses. Among these, one wire is called as phase while the other is called as neutral.
Read more ...August 03, 2021
The production of electricity is done far away from cities at electricity generation centers. These power plants depend upon water, thermal energy, wind or geothermal power. Here, electricity is produced usually at 11 KV (voltage), 50 Hertz (frequency).
Read more ...August 02, 2021
Electric Generator is such a device that converts mechanical energy to electrical energy.
Read more ...August 01, 2021
Magnetic field is created when current flows through a solenoid (a cylindrical core of insulated copper wires). Do you think that the reverse should also be possible? That means conversion of electricity from magnetism.
Read more ...July 31, 2021
When current flows through a conductor, magnetic field is produced around it. The direction of this field (B) depends upon the direction of flow of electric current (I). Similarly when an electrical conductor is placed in a magnetic field, a force acts upon it.
Read more ...July 30, 2021
An electromagnet is a type of magnet in which magnetic field is produced by the flow of electric current.
Read more ...July 29, 2021
Keep a small magnetic needle near a bar magnet. The magnetic needle rotates and stops in a particular direction only. This shows that a force acts on the magnetic needle that makes it rotate and rest in a particular direction only. This force is called torque.
Read more ...July 29, 2021
When electric current passes through current carrying conductor or coil then a magnetic field is produced around it. The working of appliances like electric bell is based on this principle. As opposite to this if a continuous change in magnetic field is produced then electric current can be produced. This is how electricity and magnetism have become synonymous today.
Read more ...July 27, 2021
Congress governments in different provinces remained in office for over two years and undertook various measures in the interest of various sections of the people. Reduction in rent for the peasantry, release of political prisoners and the lifting of restriction on the press were some of the steps taken by the Congress governments.
Read more ...July 27, 2021
The rate at which electric energy is consumed or dissipated is termed as electric power.
Read more ...July 26, 2021
In 1935 was passed the Government of India Act that extended some concessions to the nationalist movement by introducing more autonomy to the elected members in the legislatures of the provinces. This Act also extended the voting rights to a greater percentage of the Indian People.
Read more ...July 26, 2021
On passing electric current through the filament of an electric bulb, it gets heated and glows brightly. Similarly, on passing current through an electric heater, the coil of the heater becomes red hot. Why? It is because in an electric circuit, electrical energy is converted into heat energy. This effect is known as thermal effect of electric current or Joules' heating.
Read more ...July 25, 2021
The years between 1930 and 1934 was also marked by an unprecedented explosion of acts of revolutionary terrorism with its focus in Bengal and Punjab. A total of 92 incidents were reported in 1931 itself that included 9 murders.
Read more ...July 25, 2021
In an electric circuit, resistors can be connected in two different ways: (i) Series Combination: two or more resistors are combined end to end consecutively. (ii) Parallel Combination: two or more resistors can be connected between the same two points.
Read more ...July 24, 2021
As there was no response to the eleven point ultimatum, the movement of civil disobedience was launched based on the issue of salt. Salt was an item of basic necessity for all and any taxation on it would affect the poorest of the poor, thus salt became the symbol of the deprivation and oppression of the Indian people.
Read more ...July 24, 2021
The electrical resistance is the tendency to resist the flow of electric current. A wire having a desired resistance for use in an electric circuit is called a resistor.
Read more ...July 23, 2021
Amidst this reformulation and resurgence of the revolutionary movement and the subdued state of the mainstream movement was announced the Simon Commission to formulate further constitutional reforms for India. The all-white commission did not include any Indian and thus it was clear that the forthcoming reforms, if any, would not fulfill the aspirations of the Indian people.
Read more ...July 23, 2021
Matter is made up of protons, electrons and neutrons. Protons carry positive charge, electrons carry negative charge and neutrons do not carry any charge. An atom is electrically neutral but if a body carries excess of protons than the electrons, the body gets positively charge. If the body has excess of electrons than the protons, body gets negatively charged.
Read more ...July 22, 2021
The spontaneous upsurge of the non-cooperation movement released the great force of India’s youth that were determined to wrest freedom. The youth of the country had responded eagerly to the call of Gandhi and had participated in the non-cooperation movement.
Read more ...July 22, 2021
All electrical appliances like a bulb or a heater's coil are based on the movement of charges. Like flowing water constitute water current in rivers, similarly electric charge flowing through a conductor or a metallic wire constitutes electric current - the quantity of charge flowing per unit time.
Read more ...July 21, 2021
Martial law was imposed in Punjab after the Jallianwalla Bagh massacre. Inhuman treatment was meted out to Indians e.g. men were made to crawl on their bellies in the bylane where a European woman had been attacked. Although the Rowlatt satyagraha had been withdrawn, the feeling of resentment toward British rule grew even more bitter.
Read more ...July 21, 2021
Consider a charge q is placed at a point. Let B and C be two points where point B is closer to q than C. If a charge q is brought from infinity to C or from infinity to B work done respectively be WC and WB.
Read more ...July 20, 2021
The British Government introduced the next set of constitutional reforms in 1919 (The Montague-Chelmsford Reforms). Although these reforms claimed to have brought forth local self-government and considerable autonomy to Indians, they kept the real powers firmly in British hands.
Read more ...July 20, 2021
Consider an uncharged body like a glass rod which is given a certain charge (say a positive charge), the body acquires that charge. Now if you add more charge of the same nature on it, the charge will experience a force of repulsion due to already existing charge on it.
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