Current Electricity and Electrical InstrumentHard
Question
In the circuit diagram each resistor of resistance 5Ω. The points A and B are connected to the terminals of a cell of electromotive force 9 volt and internal resistance 2/3Ω
Options
A.The heat produced in the cell is 6W.
B.The current in the resistor connected directly between A and B is 1.4A.
C.The current in the resistor connected directly between A and B is 1.8A.
D.None of the above is correct.
Solution
Rearranged circuit between A & B is :
(due to symmetry)
Total resistance of circuit
=
= 3Ω i = 
= 3 A
Heat produced in cell
= I2r = (3)2 ×
= 6W
Current in resistance connected directly between
A & B =
× 3 = 
= 1.4A
(due to symmetry)
Total resistance of circuit
=
= 3Ω i = = 3 AHeat produced in cell
= I2r = (3)2 ×
= 6WCurrent in resistance connected directly between
A & B =
× 3 = = 1.4ACreate a free account to view solution
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