# What is the voltage-time graph for an inductor when the switch closes?

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The potential difference between the inductor is the emf of the source when t=o, so how does the p.d. vary until the steady state current?

The potential difference between the inductor is the emf of the source when t=o, so how does the p.d. vary until the steady state current?

##### 1 Answer

#### Explanation:

This equation gives voltage (

At time

As time increases the voltage over the inductor decreases exponentially, and the voltage across the series resistance increases exponentially.

Voltage across the resistor:

The graph of these voltages is below.

Source https://www.electronics-tutorials.ws/inductor/lr-circuits.html

The blue line represents

Note that if