what is the uses of input and out put device ?
what is resistance and restivity?
what is ohms law?
what is the formula of plaster of paris and gypsum?
what is magnetic effects of electric current define in your own language?
Answers
Answer:
1.Input and output devices allow the computer system to interact with the outside world by moving data into and out of the system. An input device is used to bring data into the system. Some input devices are: Keyboard.
2.Electrical resistivity is a fundamental property of a material that measures how strongly it resists electric current. Its inverse, called electrical conductivity, quantifies how well a material conducts electricity. A low resistivity indicates a material that readily allows electric current.
3.Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit. To students of electronics, Ohm's Law (E = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists.
4.The compound plaster of Paris is prepared by heating gypsum at 120oC. The chemical formula for the plaster of Paris is (CaSO4) H2O and is better known as calcium sulfate hemihydrate