Using only physics explanations, and not mathematical ones, explain why: 1) A se

Question

Using only physics explanations, and not mathematical ones, explain why:

1) A series RL circuit with a DC supply (a resistor, inductor, and ideal battery) will have a current that turns on and off with a time constant given by L/R, so that a large R or small L result in a short time constant while a large L or small R result in a long time constant.

2) A capacitor in an AC circuit has impedence 1/C. At low frequencies or values of capacitance, this impedence is very large. Does that produce a large or small maximum current? Why does that behavior makes sense for small or C?

3) A capacitor in an AC circuit has impedence 1/C. At high frequencies or values of capacitance, this impedence is very small. Does that produce a large or small maximum current? Why does that behavior for the peak current makes sense for high or C?

4) An inductor in an AC circuit has impedence L. At low frequencies or values of inductance, this impedence is very small. Does that produce a large or small maximum current? Why does that behavior makes sense for small or L?

5) An inductor in an AC circuit has impedence L. At high frequencies or values of inductance, this impedence is very large. Does that produce a large or small maximum current? Why does that behavior for the peak current makes sense for high or L?

Explanation / Answer

1)

In a series LR circuit when the current is steady and unchanging. so it is simply acts like a wire. The time consytant of the circuit is the time at which the current has decreases to 1/e of its initial value. As the resistance increases, current throug is less and the time constant is more.

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