An inductor L of inductance `X_(L)` is connected in series with a bulb B and an AC source . How would brightness of the bulb change when (i) number of turns in the inductor is increased (ii) an iron rod is inserted in the inductor and (iii) a capacitor of reactance `X_(C)=X_(L)` is inserted in series .

Explanation

To solve the problem, we will analyze the effect of each scenario on the brightness of the bulb connected in series with an inductor and an AC source. The brightness of the bulb is related to the current flowing through it, which is influenced by the impedance of the circuit.

### Step-by-Step Solution:

1. **Understanding the Circuit:**
- The circuit consists of an inductor (L), a bulb (B), and an AC source. The impedance (Z) of the circuit is given by:
\[
Z = \sqrt{R^2 + X_L^2}
...