What is meant by magnetic flux? A wire cuts across a flux of `0.2 xx 10^(-2)` weber in 0.12 second. What is the emf induced in the wire?

Explanation

To solve the problem, we need to follow these steps:

### Step 1: Understand Magnetic Flux
Magnetic flux (Φ) is defined as the product of the magnetic field (B) and the area (A) through which the field lines pass, taking into account the angle (θ) between the magnetic field lines and the normal (perpendicular) to the surface. Mathematically, it can be expressed as:
\[ Φ = B \cdot A \cdot \cos(θ) \]
The SI unit of magnetic flux is the weber (Wb).
...