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A battery having 12V emf and internal resistance 3Ω is connected to a resistor. If the current in the circuit is 1A, then the resistance of resistor and lost voltage of the battery when circuit is closed will be
  • a)
    7Ω, 7V
  • b)
    8Ω, 8V
  • c)
    9Ω, 9V
  • d)
    9Ω, 10V
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
A battery having 12V emf and internal resistance 3Ω is connected...
Here,
ε = 12V,  r = 3Ω, I = 1A, V = IR = ε − Ir
∴ 
= 12 − 3 = 9Ω
and V = IR = 1 × 9 = 9V
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Most Upvoted Answer
A battery having 12V emf and internal resistance 3Ω is connected...
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A battery having 12V emf and internal resistance 3Ω is connected to a resistor. If the current in the circuit is 1A, then the resistance of resistor and lost voltage of the battery when circuit is closed will bea)7Ω, 7Vb)8Ω, 8Vc)9Ω, 9Vd)9Ω, 10VCorrect answer is option 'C'. Can you explain this answer?
Question Description
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