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Question
When a DC voltage is applied at the two ends of a circuit kept in a closed box, it is observed that the current gradually increases from zero to a certain value and then remains constant. What do you think that the circuit contains?
When a DC voltage is applied at the two ends of a circuit kept in a closed box, it is observed that the current gradually increases from zero to a certain value and then remains constant. What do you think that the circuit contains?
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Solution
The correct option is C A resistor and a inductor in series
In steady state, , a capacitor behaves like an infinite resistance while an inductor will behave like a wire. Hence current is constant with inductor & zero with capacitor.
Since DC current is given, thats why resistance in series is also necessary.
In steady state, , a capacitor behaves like an infinite resistance while an inductor will behave like a wire. Hence current is constant with inductor & zero with capacitor.
Since DC current is given, thats why resistance in series is also necessary.
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