A heater joined in series with a ` 50 W` bulb is connected to the mains . If the `50 W` bulb is replaced by a `100 W` bulb , then will the heater now give more heat , less heat, or same heat ? Why ?

Explanation

To solve the problem, we need to analyze the effect of replacing a 50 W bulb with a 100 W bulb in a series circuit containing a heater.

### Step-by-Step Solution:

**Step 1: Understand the Series Circuit Configuration**
- In a series circuit, the total current flowing through the circuit is the same for all components. The total voltage from the mains is divided among the components based on their resistances.

**Step 2: Calculate the Resistance of the Bulbs**
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