Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors
At t = 0 , a capacitance C , a resistance R , and an emf E are connected in series. Determine the maximum value of the current in the circuit.
Options
- A2 E R
- BE 2R
- CE R
- DZero
Correct answer
C. E R
Step-by-step solution
At t = 0 , the capacitor is uncharged and acts as a short circuit. The equation for the current in an RC series circuit during charging is given by I = E R e^ -t / RC . The maximum value of the current occurs at t = 0 . Substituting t = 0 , we get I_ max = E R .