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Category - Electrical

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Magnetic Field Due to an Electric Current

May 15, 2023
by Santhakumar Raja
4 min read
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Magnetic fields can be set up not only by permanent magnets, but also by electric currents. Let a piece of wire be arranged to pass vertically through a horizontal sheet of cardboard on which is placed some iron filings, as shown...

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three capacitors
  • Electrical

Capacitors Connected in Parallel and Series

May 6, 2023
by Santhakumar Raja
3 min read
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(a) Capacitors connected in parallel Figure shows three capacitors, C1, C2 and C3, connected in parallel with a supply voltage V applied across the arrangement. When the charging current I reaches point A it divides, some...

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Alternative and Renewable Energy Sources
  • Electrical

Alternative and Renewable Energy Sources

May 6, 2023
by Santhakumar Raja
3 min read
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Alternative energy refers to energy sources which could replace coal, traditional gas and oil, all of which increase the atmospheric carbon when burned as fuel. Renewable energy implies that it is derived from a source which is...

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Resistance
  • Electrical

EMF and Internal Resistance of a Cell

May 6, 2023
by Santhakumar Raja
3 min read
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The electromotive force (e.m.f.), E, of a cell is the p.d. between its terminals when it is not connected to a load (i.e. the cell is on ‘no load’). The e.m.f. of a cell is measured by using a high resistance voltmeter...

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Chemical Effects of Electric Current
  • Electrical

Chemical Effects of Electric Current

May 3, 2023
by Santhakumar Raja
2 min read
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A material must contain charged particles to be able to conduct electric current. In solids, the current is carried by electrons. Copper, lead, aluminium, iron and carbon are some examples of solid conductors. In liquids and...

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Resistor Colour Coding and Ohmic Values
  • Electrical

Resistor Colour Coding and Ohmic Values

May 1, 2023
by Santhakumar Raja
1 min read
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(a) Colour code for fixed resistors The colour code for fixed resistors is given in table. Colour Significant...

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What Drives the Current Between Two Points in a Circuit
  • Electrical

What Drives the Current Between Two Points in a Circuit?

April 26, 2023
by Santhakumar Raja
2 min read
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The movement of electric charge drives the current in a circuit. The negatively charged atom-containing particles known as electrons are responsible for carrying electric charge. A power source, like a battery or generator, in a...

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Electric Current and Quantity of Electricity
  • Electrical

Electric Current and Quantity of Electricity

April 25, 2023
by Santhakumar Raja
3 min read
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All atoms consist of protons, neutrons and electrons. The protons, which have positive electrical charges, and the neutrons, which have no electrical charge, are contained within the nucleus. Removed from the nucleus are minute...

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Standard Symbols for Electrical Components
  • Electrical

Standard Symbols for Electrical Components

April 25, 2023
by Santhakumar Raja
1 min read
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Symbols are used for components in electrical circuit diagrams and some of the more common ones are shown in Fig. Read More Topics Electrical / electronic system block diagram Electrical potential and...

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Electrical system
  • Electrical

Electrical / Electronic System Block Diagrams

April 25, 2023
by Santhakumar Raja
2 min read
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An electrical / electronic system is a group of components connected together to perform a desired function. Figure shows a simple public address system, where a microphone is used to collect acoustic energy in the form of sound...

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