When a particular cell is in an open circuit,the pd between its terminal is 1.50v.when a 5ohm resistor is connected between the terminals,the pd drop to 1.25v .when the 5ohm resistor is replaced by the a resistance x,the pd become 1.00v .caculate (1) the internal resistance of the cell end (2) the value of the resistance x?
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Expert's answer
2018-08-21T11:05:08-0400
The Ohm’s law states I=ℇ/(R+r),I=V/R Where ℇ=1.50 V is EMF of the battery R=5 Ω is the external resistance r is the internal resistance V is the potential difference Thus V/R=ℇ/(R+r)
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