Explanation

The induced electromotive force (emf) ($varepsilon$) in a moving conductor in a magnetic field can be calculated using the formula:

$$\epsilon =B\cdot L\cdot v$$

Where:

• $B$ is the magnetic field strength (in teslas),
• $L$ is the length of the conductor (in meters),
• $v$ is the velocity of the conductor (in meters per second).

Given:

• $B = 0.6 , text{T}$
• $L = 1 , text{m}$
• $v = 20 , text{m/s}$

Substituting the values into the formula:

$$\epsilon =0.6\text{T}\cdot 1\text{m}\cdot 20\text{m/s}=12\text{V}$$

Thus, the value of the induced emf is 12 V.