The two rails of a railway track, insulataed form each other and from the ground, are connected to a millivoltmeter. What will be the reading of the millivoltmeter when a train travels on the track at a speed of `180km h^(-1)? The vertical component of earth's magnetic field is 0.2 X 10^(-4) and the rails are separted by 1m.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Convert the speed of the train from km/h to m/s
The speed of the train is given as 180 km/h. We can convert this to meters per second using the conversion factor \( \frac{5}{18} \).

\[ V = 180 \, \text{km/h} \times \frac{5}{18} \, \text{m/s per km/h} = 50 \, \text{m/s} \]
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