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AP EAMCET20225 Jul 2022Evening ShiftPhysicsCurrent ElectricityActual

A battery with a 12 ~V emf has an initial charge of 80 ~A . h . If the potential across the terminals stays constant until battery is completely discharged, then this battery can deliver energy at the rate of 120 ~W for a time

Options

  1. A16 ~h
  2. B8 ~h
  3. C4 ~h
  4. D5 ~h

Correct answer

B. 8 ~h

Step-by-step solution

We have, aligned U & = P t = q t & = q P = (80 ~A . h ) (12 ~V ) 120 ~W =8 ~h aligned

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