A tiny, rocky or metallic object that circles the sun is called an asteroid. The asteroid belt, which spans the space between Mars and Jupiter’s orbits, is where the majority of asteroids are found. While others have orbits that bring them closer to Earth and other planets, some asteroids do. Asteroids can range in size
What is an Asteroid? Read More »
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 gases, the current is carried by the part of a molecule which has acquired an electric charge, called ions.
Chemical Effects of Electric Current Read More »
(a) Colour code for fixed resistors The colour code for fixed resistors is given in table. Colour Significant Figures Multiplier Tolerance Silver – 10-2 ±10% Gold – 10-1 ±5% Black 0 1 – Brown 1 10 ±1% Red 2 102 ±2% Orange 3 103 – Yellow 4 104 – Green 5 105 ±0.5% Blue 6
Resistor Colour Coding and Ohmic Values Read More »