Question on: JAMB Physics - 2006
A cell of internal resistance r is connected to an external resistor R. The conductor for maximum power transfer is?
A
R < r
B
R = r
C
R = 2r
D
R > r
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Correct Option: D
p is the time rate of expending energy. for electrical energy, P = IV; 12R or (V)/R. For a cell of constant e.m.f (voltage) maintaining constant current(1) through the circuit, P α R; OR (1)/R.
Again for maxi. power,p α R
And with respect to the opinion, maxi power would be transferred when R>r:not necessarily R = 2r
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