47. When two involute profiles are in meshing, the pressure angels of the profiles on the meshing point , and when they are in meshing at the pitch point, the pressure angles .
A. must be equal B. must be not equal C. generally not equal
Answers
As the length increases, the number of collisions by the moving free electrons with the fixed positive ions increases as more number of fixed positive ions are present in an increased length of the conductor. As a result, resistance increases.There is a higher current in the thicker wire (although per unit area, of course, each wire carries the same current). ... A thicker wire simply has more 'lanes' on the go at once. A higher current for a given voltage means a lower resistance. The thicker wire in (4) has a lower resistance than the thinner wire in (3).The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through. The relationship between resistance and wire length is proportional .The current will flow more easily through a thick wire than through a thin wire of the same material when connected to the same source. This is due to the fact that the resistance of a wire is inversly proportional to the square of its diameter.Length of wire definitely have effect on current and voltage.. ... As the length increases, resistance increases, as a result current decreases. In case of voltage, the Ferranti effect is an increase in voltage occurring at the receiving end of a long transmission line , above the voltage at the sending end .An electrical current at 1,000 volts is no more deadly than a current at 100 volts, but tiny changes in amperage can mean the difference between life and death when a person receives an electrical shock.