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Resistivity Resistivity: The resistance of a wire or material conductor maintained at a constant temperature is related to its length (l) and its cross-sectional area (A) by the expression R = ρ l/A Where ρ is a constant of proportionality known as the resistivity of the material Then we could deduce ρ = RA/l Thus […]
Classwork Series and Exercises {Physics- SS3}: Electric Measurement Read More »
Following the participation of the Nigerian contingent in the World Schools Debate Competition in Bangkok this year, Nigeria has been granted the hosting rights for the 2015 edition of the competition. According to the Coordinator of the President’s School Debate, Dare Oritu, Nigeria won the hosting rights due to the brilliant performance of the country’s
Nigeria To Host 2015 World Schools Debate Competition Read More »
Introduction We define the notation 22 as “two squared” or the square of two” or “two raised to the power of 2” and it means 2 x 2. i.e. 22 = 2 x 2 (i.e. 2 multiplied by itself in 2 places ) also 23 = 2 x 2 x 2 ( i.e. 2 multiplied
Classwork Series and Exercises {Mathematics- SS1}: Indices Read More »
Introduction Electrons Electrons were discovered by Sir John Joseph Thomson in 1897 in his cathode ray experiment. He subjected residual gas to a high potential difference at a very low pressure. He observed rays travelling in straight lines from the cathode. He called the rays cathode rays. After many experiments of cathode-rays, J.J. Thomson demonstrated
