A square loop of side 10 cm and resistance 0.5 `Omega` is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set up across the plane in the north-east direction. The magnetic field is decreased to zero in 0.70 s at a steady rate. Determine the magnitudes of induced emf and current during this time-interval.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the Problem
We have a square loop of side 10 cm (0.1 m) and resistance 0.5 Ω placed in a magnetic field of 0.1 T, which is directed northeast. The magnetic field is decreased to zero in 0.70 seconds. We need to find the induced electromotive force (emf) and the current during this time interval.

### Step 2: Calculate the Area of the Loop
The area \( A \) of the square loop can be calculated using the formula:
\[
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