A uniform metal ring with centre `C` have two points `A` and `B` such that angle `ACB` is `theta`. `A` and `B` are maintained at two different constant temperature.
If the angle between `A` and `B` i.e. `theta=180^(@)` the rate of heat flow from `A` and`B` is `1.2W`, then what will be the rate, when `theta=90^(@)`?

Options

A. `0.6W`
B. `0.9W`
C. `1.6W`
D. `1.8W`

Explanation

To solve the problem, we need to analyze the heat flow through a uniform metal ring when the angle between two points A and B changes. We will use the principles of thermal resistance and heat flow.

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have a uniform metal ring with center C.
- Points A and B are on the ring, and the angle ACB is denoted as θ.
- We know that when θ = 180°, the rate of heat flow (Q1) is 1.2 W.
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