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A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

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Emf of the battery, E = 10 V Internal resistance of the battery, r = 3 Ω Current in the circuit, I = 0.5 A Resistance of the resistor = R The relation for current using Ohm’s law is, Terminal voltage of the resistor = V According to Ohm’s law, V = IR = 0.5 × 17 = 8.5 V Therefore,...
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Emf of the battery, E = 10 V

Internal resistance of the battery, r = 3 Ω

Current in the circuit, I = 0.5 A

Resistance of the resistor = R

The relation for current using Ohm’s law is,

Terminal voltage of the resistor = V

According to Ohm’s law,

V = IR

= 0.5 × 17

= 8.5 V

Therefore, the resistance of the resistor is 17 Ω and the terminal voltage is

8.5 V.

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