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 analyze the statements given in the question, we need to evaluate both the assertion (A) and the reason (R) separately.

### Step-by-Step Solution:

1. **Understanding 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 its sides due to the magnetic field. However, these forces act in opposite directions on opposite sides of the loop, resulting in a net force of zero.

2. **Understanding Reason (R)**:
- The reason states that a current loop placed in a uniform magnetic field never experiences a torque.
- This statement is incorrect. A current loop can experience torque in a uniform magnetic field, which is given by the formula \( \tau = \mathbf{M} \times \mathbf{B} \), where \( \tau \) is the torque, \( \mathbf{M} \) is the magnetic moment, and \( \mathbf{B} \) is the magnetic field. The torque is dependent on the angle between the magnetic moment and the magnetic field.

3. **Evaluating the Truth of A and R**:
- Since the assertion (A) is true (the net magnetic force is zero), but the reason (R) is false (the loop can experience torque), we conclude that the assertion is true, but the reason is false.

4. **Final Conclusion**:
- Therefore, the correct answer is that assertion A is true, and reason R is false.

### Summary:
- Assertion (A) is True: The net magnetic force experienced by a current-carrying loop in a uniform magnetic field is indeed zero.
- Reason (R) is False: A current loop can experience torque in a uniform magnetic field.