Question

EG 171 Test Chapters 7 Date: 214れ ,3& Name 24. The amount by which the actual resistance can differ from the color-coded value is the: a. temperatare coefficient b. power rating e differiential resistance D tolerance 25. The resistance value of a chip resistor is determined from the size of the resistor three digit number printed on the body d. color-code c. three letters printed on the body True/False Indicate whether the statement is true or false 26. The practical unit of resistance is the mho.. 27. Wire-wound resistors are larger and have higher wattage ratings than carbon resistors. For a given length of wire, the resistance, R, decreases as its diameter and cross-sectional area increase. -28. 29. The maximum working voltage of a resistor is the maximum allowable voltage that the resistor can safely withstand without internal arcing. 30. If resistance is equal in all branches, the combined equivalent resistance equals the value of one branch resistance divided by the number of branches 1 31. Ohm's law states that the amount of current is directly proportional to the voltage and inversely proportional to the resistance. 32. Semiconductors have five electrons in the outermost ring. 33. The total resistance of a series string equals the sum of the individual resistances. 34. In loop analysis, a branch point is also called a node. 35. A series circuit is any circuit that provides only one path for current flow.

Answer 1

Tolerance. Three digit printed on the body. False, Because practical unit of resistance is Ohm. True. True R = rho l/A A = pi d^2/4 As diameter d uparrow increases. Area, A uparrow. If length is kept same. Then R downarrow True. \r\n True, for a branch containing resistances in parallel. False. All semiconductors don't have 5 electrons in outermost branch. Only n type semiconductors have 5 electrons in outermost ring. True. True. True. True. False. The branch with lowest resistance has maximum current. R_eq = R_1 times R_2/R_1 + R_2. \r\n It is not always true, it is true only if the no. of nodes is less than the no. of loops. True, V = IR = > I = V/R = 1V/1 Ohm = 1V/R = 1A. True. True. True. True. True. \r\n True. True. False, R has three terminals. True. True. True.