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Q.

A battery of emf 10V and internal resistance 3Ω  is connected to a resistor. The current in the circuit is 0.5A. then the terminal voltage of the battery when the circuit is close is ______ volts.

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answer is 8.5.

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Detailed Solution

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i=ER+r; ⇒R+r=100.5 ⇒R=20-3=17Ω    V=iR=0.517=8.5V sub

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A battery of emf 10V and internal resistance 3Ω  is connected to a resistor. The current in the circuit is 0.5A. then the terminal voltage of the battery when the circuit is close is ______ volts.