A battery of emf 12 V and internal resistance 3 Ω is connected to an external resistor. If the current in the circuit is 0.6 A, the voltage across the external resistor will be
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 10.2 V
Given:
EMF, $E = 12\,V$
Internal resistance, $r = 3\,\Omega$
Current, $I = 0.6\,A$
Voltage across external resistor, $V = E - Ir$
$V = 12 - (0.6)(3)$
$V = 12 - 1.8 = 10.2\,V$
Voltage across the external resistor = 10.2 V