Question

What is a series RL circuit?

Answer 1

1. A circuit containing pure resistance connected in series with a coil having pure inductance is called an RL series circuit.
2. The current is constant in the circuit.
3. The time constant $\left(\tau \right)$ for an RL circuit is defined by
   $\tau =\frac{L}{R}$
   where, $L$represents inductance and $R$ represents resistance.
4. The total impedance $\left(\mathrm{Z}\right)$ of the RL series circuit
   $Z=\sqrt{R^2+X_L^2}$
   where, $X_L$represents inductive reactance and $R$ represents resistance.
5. The voltage drop $\mathrm{V}\left(\mathrm{t}\right)$ in the RL series circuit
   $\mathrm{V}\left(\mathrm{t}\right)={\mathrm{V}}_{\mathrm{R}}+{\mathrm{V}}_{\mathrm{L}}$
   where, ${\mathrm{V}}_{\mathrm{R}}$is the voltage drop across the resistance and ${\mathrm{V}}_{\mathrm{L}}$