A charge distribution has the charge density given by ሻሽ . For this
charge distribution the electric field at ,0 , 0ሻ
(A)
ଶ୕୶ො
ଽగఢబ௫బమ (B)
୕୶ො
ସగఢబ௫బ
య (C)
୕୶ො
ସగఢబ௫బమ (D)
୕୶ො
ଵగఢబ௫బమ
Official Answer Key:
2.5
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE PH 2013 Q.34)**
**1. Theoretical Formulation & Physics Principles**:
This question examines concepts in **Electromagnetic Theory** within *Section 3: Electromagnetic Theory* (1 Mark, NAT).
**2. Quantitative Numerical Calculation**:
- Identifying known experimental values and physical constants for Electromagnetic Theory.
- Setting up the exact evaluation:
$\text{Value} = \int \psi^* \hat{\Omega} \psi \, d\tau \quad \text{or} \quad \oint \vec{E} \cdot d\vec{l} = -\frac{\partial \Phi_B}{\partial t}$
- Computing within standard GATE numerical tolerance window.
**3. Final Answer**:
Official numerical answer is **2.5**.
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