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Persuasive Essay

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  • December 12, 2012
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ASSIGNMENT 1

Q1. Define following terms:

Electric charge
A property of a particle by which it may repel or attract other particles that have a charge of similar or opposite sign.

Current
A flow of positive electric charge. The strength of current flow in any medium is related to  voltage differences in that medium, as well as the electrical properties of the medium and is measured in amperes. Since electrons are stipulated to have a negative charge, current in  an electrical circuitactually flows in the opposite direction of the movement of electrons.

Voltage
A measure of the difference in electric potential between two points in space, a material or an electric circuit, expressed in volts. 

Resistance
A property of aconductor by virtue of which the passage of current is opposed, causing electric energy to be transformed in to heat: equal to the voltage across the conductor divided by the current flowing in the conductor: usually measured in ohms.

Q2. Differentiate between Electrical & Electronics engineering. Electrical Engineering is the branch of engineering concerned with the practical applications of electricity in all its forms, including those of the field of electronics. 

Electronics engineering is that branch of electrical engineering concerned with the uses of the electromagnetic spectrum and with the application of such electronic devices as integrated circuits, transistors, and vacuum tubes.

Q3. Differentiate between electric conductors & insulators.

Conductors
In a metallic conductor such as copper, the atoms are arranged in a regular array called a crystal lattice. The electrons in the outer orbits of each metal atom are only loosely bound to the nucleus. These electrons are not closely associated with any particular atom and are free to move through the crystal lattice. Once an electron has left its orbit around a particular atom, that atom is left with an excess positive charge. The electron-deficient atom...