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A battery charger can drive a current of 5 A into a 1 ohm resistance connected at its output teminals. If it is able to charge an ideal 2 V battery at 7 A rate, then its Thevenin’s equivalent will be
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- 7.5 V in series with 0.5 ohm
- 12 V in series with 1.5 ohms
- 7.5 V in parallel with 0.5 ohm
- 1.25 V in parallel with 1.5 ohms
Correct Option: B
From Fig. (a)
V = I (1 + r)
⇒ V = 5 (1 + r) ...(i)
From Fig. (b),
V – 2 = 7 r ...(ii)
Adding equations (i), and (ii), we get
V = 12 volts and, r = 1.5 Ω
