First Order Transient - 2 Starter Qui 6

In a series R-L circuit, R = 20 Ω and L = 60 mH is given. If the current lags the voltage by 60°, the value of frequency will be-

Voltage and current expressions for the circuit shown below are v(t) = 100e ^–20t and i(t) = 25e^–20t. At a time t  0. The value of L is

A DC voltage of 100 V is applied to a coil having R = 10 ohm and L = 10 H. What is the time constant of the circuit?

A 0.1 μF capacitor charged to 100 V is discharged through a 1 kΩ resistor. The time in ms (round off to two decimal places) required for the voltage across the capacitor to drop to 1 V is _________.

Consider the circuit shown in the figure below, switch is operated at t = 0

The time constant of the given circuit is

A 0.4 H inductor is connected in parallel with 200 Ω resistor as shown in figure below. At t = 0, the inductor current (i_L) is 8 A. If another resistor of 200 Ω is connected in parallel with the inductor at t = 1 msec, then the inductor current (i_L) at t = 2 msec is

For the circuit shown in figure, which of the following represents i(t) for (t > 0).