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Physics
Physics
Problem
A cell of internal resistance
r
r
r
drives current through an external resistance
R
R
R
. The power delivered by the cell to the external resistance will be maximum when : a.
R
=
0.001
r
R = 0.001r
R
=
0.001
r
b.
R
=
1000
r
R = 1000r
R
=
1000
r
c.
R
=
2
r
R = 2r
R
=
2
r
d.
R
=
r
R = r
R
=
r
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