By H. Cotton D.Sc. (auth.)

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D. f. which is required to send the current through that portion of the circuit included between those points. f. d. V. The symbol for the unit is V. Resistance The SI unit of resistance is called the ohm and is defined as follows: The ohm is the resistance between two points of a conductor when a constant difference of potential of one volt, applied between these points, produces in this conductor a current of one ampere, this conductor not being the source of any electromotive force. The symbol for the entity is R or r and for the unit n.

Which is required to send the current through that portion of the circuit included between those points. f. d. V. The symbol for the unit is V. Resistance The SI unit of resistance is called the ohm and is defined as follows: The ohm is the resistance between two points of a conductor when a constant difference of potential of one volt, applied between these points, produces in this conductor a current of one ampere, this conductor not being the source of any electromotive force. The symbol for the entity is R or r and for the unit n.

The current in each branch in terms of the total current is determined as follows: V=lR=hR 1 /1 =(R/ R1)I ELECTRIC CIRCUITS and similarly with 12 , 12 etc. I=IO I=IO I. 1. 5 and 2 Q respectively are in parallel and they share a current of 10 A. d. 3). 5 Q. d. across them and the total current measured. 5 A respectively. What is the unknown resistance? 54 BASIC ELECTROTECHNOLOGY Use subscripts x and 2 for the two resistors. 8 A :. 1 A :. 74 Q In most practical circuits series and parallel connections exist together.