A: Net magnetic force expericneed by a current carrying loop in a uniform magnetic field is always zero.
R. A current loop placed in a uniform magnetic field never experiences a torque.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark 2.
C. If assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the assertion-reason question, we need to analyze both the assertion (A) and the reason (R) provided.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "the net magnetic force experienced by a current-carrying loop in a uniform magnetic field is always zero."
- A current-carrying loop in a uniform magnetic field experiences forces on each segment of the loop. However, these forces are equal in magnitude and opposite in direction for opposite sides of the loop, leading to a net force of zero.
- Therefore, the assertion is **correct**.

2. **Understanding the Reason (R)**:
- The reason states that "a current loop placed in a uniform magnetic field never experiences a torque."
- Torque (\(\tau\)) on a current loop in a magnetic field is given by the formula \(\tau = N \cdot I \cdot A \cdot B \cdot \sin(\theta)\), where \(N\) is the number of turns, \(I\) is the current, \(A\) is the area vector, \(B\) is the magnetic field, and \(\theta\) is the angle between the area vector and the magnetic field.
- If the magnetic field is uniform, the current loop can still experience a torque depending on its orientation relative to the magnetic field. Thus, the reason is **incorrect**.

3. **Conclusion**:
- The assertion is correct, but the reason is incorrect. Therefore, the correct answer is that both statements are correct, but the reason is not a correct explanation for the assertion.

### Final Answer:
- Assertion (A) is true.
- Reason (R) is false.
- Therefore, the answer is: **A is true, R is false**.