When a 100-? resistor is connected to a battery of emf E and internal resistance r, the battery delivers a power P = 0.794 W. When a 200 ? resistance is connected to same battery it delivers a power P = 0.401 W
What are the emf and internal resistance of the battery? A)
E = 10 V, r = 5 ?
B)
E = 4.5 V, r = 4 ?
C)
E = 18 V, r = 4 ?
D)
E = 9 V, r = 2 ?
E)
E = 12 V, r = 6 ?
D
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