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- Engineering
- A series combination of an inductance (L) and a resistance (R) is connected to a battery of emf E. The final value of current depends onOption: 1 L a
- #Class 12
- #Joint Entrance Examination Main
- #Physics
- #Engineering
- #Electromagnetic Induction and Alternating currents
A series combination of an inductance (L) and a resistance (R) is connected to a battery of emf E. The final value of current depends on
Option: 1
L and R
Option: 2
E and R
Option: 3
E and L
Option: 4
E, L and R
Answers (1)
Initially, the induced emf (or back emf) in the growing of current through the circuit.
The inductance behaves as an open-circuit. Once the current builds up to its final value
I0, there occurs no more change in the current. The back emf induced in the inductance
reduces to zero. It behaves like a short-circuit. Hence the final value of the current is
which depends only on E and R. Hence, answer (b) is correct.
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