A conducting circular loop of radius r is rotated about its diameter at a constant angular velocity `omega` in a magnetic field B perpendicular to the axis of rotation. In what position of the loop is the induced emf zero?

Explanation

To solve the problem, we need to determine the position of a conducting circular loop, which is rotating in a magnetic field, where the induced electromotive force (emf) is zero. Here’s the step-by-step solution:

### Step 1: Understand the Setup
We have a conducting circular loop of radius \( r \) that is rotating about its diameter with a constant angular velocity \( \omega \) in a magnetic field \( B \) that is perpendicular to the axis of rotation.

### Step 2: Define Magnetic Flux
The magnetic flux \( \Phi \) through the loop is given by the formula:
\[
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