The angular momentum of a wheel changes from 3 L to 7 L in 4 sec. What is the magnitude of torque acting on it ?

Options

A. L
B. 2 L
C. 3 L
D. 4 L

Explanation

To solve the problem of finding the magnitude of torque acting on a wheel whose angular momentum changes from \(3L\) to \(7L\) in \(4\) seconds, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the relationship between torque and angular momentum**:
The torque (\(\tau\)) acting on an object is related to the rate of change of angular momentum (\(L\)). The relationship is given by the equation:
\[
\tau = \frac{dL}{dt}
...