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Inductors - Technical MCQs

Q1:

How long until the current is at a maximum?

mcq8_1032_1.gif

A 0 mu.jpgs

B 5 mu.jpgs

C 15 mu.jpgs

D 25 mu.jpgs

ANS:B - 5 mu.jpgs

Time constants in electrical circuits
In an RL circuit composed of a single resistor and inductor, the time constant Ï„ (in seconds) is

where R is the resistance (in ohms) and L is the inductance (in henries).
Similarly, in an RC circuit composed of a single resistor and capacitor, the time constant Ï„ (in seconds) is:

where R is the resistance (in ohms) and C is the capacitance (in farads).