Introduction to Reliability and Maintainability Engineering by Charles E. Ebeling

By Charles E. Ebeling

It is a nice source, besides the fact that, fee for the most recent revision. i bought this prior to I knew in regards to the new revision. the recent rev comprises updates as well as software program. additionally the revision is more affordable.

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F. 5 Q is connected to a circuit consisting of a resistor of 1 Q in series with two resistors of 2 Q and 3 Q in parallel. d. and the volt drop along each resistor. 4. 200 R2 +R3 5 :. 703 V :. d. 5 Alternative methods of connecting cells to form a battery. d. d. which is utilised externally. 5a and b. 5c. f. per cell Rc =resistance per cell R =external resistance BASIC ELECTROTECHNOLOGY 56 (a) Series. f. E=nEc Total battery resistance= nRc Total circuit resistance=nRc+R :. I _nE_c__ nRc+R Suppose R is very small then I~ nEe/nRc= E/ Rc resistance putting a number of cells in series is little better than using only one cell.

5a and b. 5c. f. per cell Rc =resistance per cell R =external resistance BASIC ELECTROTECHNOLOGY 56 (a) Series. f. E=nEc Total battery resistance= nRc Total circuit resistance=nRc+R :. I _nE_c__ nRc+R Suppose R is very small then I~ nEe/nRc= E/ Rc resistance putting a number of cells in series is little better than using only one cell. Now suppose that R is very large compared with Rc then I~nEc/R showing that the greater the value of n the greater the current. Thus connecting cells in series is the best arrangement when the external resistance R is large.

V1 -VJq=Eqx Thus the electric field strength is equal to the potential gradient. Now a gradient is directional and therefore Eisa vector quantity. If a charge which is free to move is situated in an electric field it will move along a line of force. If it is positive it will move in the direction of the lines of force; if negative it will move in the opposite direction. 5 a free positive charge will move in the direction A to B, but a free negative charge will move in the direction B to A. We say that a positive charge moves down the potential after the manner of a stone rolling downhill.

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