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A Battery Has an Emf ε = 78

Question 124

Multiple Choice

A battery has an emf ε = 78.0 V and an internal resistance r = 4.0 Ω,as shown in the figure.A current of 4.7 A is drawn from the battery when a resistor R is connected across the terminals a and b.The power dissipated by the resistor R is closest to A battery has an emf ε = 78.0 V and an internal resistance r = 4.0 Ω,as shown in the figure.A current of 4.7 A is drawn from the battery when a resistor R is connected across the terminals a and b.The power dissipated by the resistor R is closest to A) 280 W. B) 340 W. C) 320 W. D) 300 W. E) 370 W.


A) 280 W.
B) 340 W.
C) 320 W.
D) 300 W.
E) 370 W.

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