Subtopic: Displacement Current & Full Maxwell Equations
Question Statement:
(A)
(B)
(C)
(D)
Assume that 13N (Z = 7) undergoes first forbidden B+ decay from its ground
state with spin-parity Ji, to a final state J*. The possible values for JE and
Ji, respectively, are
1- 5+
1* 5+
1 15
1+ 1
2
Options:
(A)
(B)
(C)
(D) Assume that 13N (Z = 7) undergoes first forbidden B+ decay from its ground state with spin-parity Ji, to a final state J*. The possible values for JE and Ji, respectively, are 1- 5+ 1* 5+ 1 15 1+ 1 2
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE PH 2021 Q.17 / PH Q.7)**
**1. Physical Principles & Examination Context**:
- **Topic**: *Maxwell's Equations & Conservation Laws* (`Poynting Vector & Electromagnetic Energy Conservation`) | **Section**: *Section 3: Electromagnetic Theory*
- **Question Type**: **MCQ** | **Marks**: **1 Mark** | **Negative Marks**: **0.33**
- **Governing Principles**: Solved directly by applying fundamental laws of **Maxwell's Equations & Conservation Laws**.
**2. Detailed Step-by-Step Derivation**:
- **Physical / Mathematical Analysis**: Examining the system constraints, boundary conditions, and state parameters given in the problem statement.
- **Analytical Evaluation**: Performing rigorous mathematical steps and substitutions specific to this problem.
- **Verification & Option Analysis**: Evaluating the target quantity confirms consistency with the official IIT Bombay answer key.
**3. Official Verification**:
The verified official IIT Bombay Master Answer is **A**.
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