Electromagnetic Field Theory MCQ Questions & Answers | ECE

A. $$\frac{8}{9}$$

B. $$\frac{1}{2}$$

C. $$\frac{1}{3}$$

D. $$\frac{5}{6}$$

A. -20 Log₁₀ (1 - |r|²)

B. -10 Log₁₀ |r|

C. -10 Log₁₀ (1 - |r|²)

D. -10 Log₁₀ (1 + |r|²)

A. 30°

B. 60°

C. 45°

D. 90°

A. ∇.B = 0

B. ∇ × D = 0

C. $$\oint {{\text{D}}.{\text{ds}} = {\text{Q}}} $$

D. ∇²A = µ₀J

A. The signal gets distorted if Z_R ≠ Z₀, irrespective of the value of Z_T

B. The signal gets distorted if Z_T ≠ Z₀, irrespective of the value of Z_R

C. Signal distortion implies impedance mismatch at both ends Z_T ≠ Z₀ and Z_R ≠ Z₀

D. Impedance mismatches don't result in signal distortion but reduce power transfer efficiency

A. Poisson's equation

B. Laplace equation

C. Continuity equation

D. Maxwell equation

A. $${\Delta ^2}\overrightarrow E - \mu { \in _0}\frac{{{\partial ^2}\overrightarrow B }}{{\partial {t^2}}} = 0$$

B. $${\Delta ^2}\overrightarrow E - {\mu _0}{ \in _0}\frac{{{\partial ^2}\overrightarrow B }}{{\partial {t^2}}} = 0$$

C. $${\Delta ^2}\overrightarrow E - {\mu _0}{ \in _0}\frac{{{\partial ^2}\overrightarrow E }}{{\partial {t^2}}} = 0$$

D. $${\Delta ^2}\overrightarrow E - \mu \sigma \frac{{{\partial ^2}\overrightarrow E }}{{\partial t}} + \mu \in \frac{{{\partial ^2}\overrightarrow E }}{{\partial {t^2}}} = 0$$

A. Constant Resistance Circle

B. Constant VSWR Circle

C. Constant Reactance Circle

D. All of the above

A. At an ambiguous range

B. At a blind range

C. In the closed vicinity of clutter

D. None of these

A. $$ - {k_y}{\overline a _y}$$

B. $$ + {k_y}{\overline a _y}$$

C. $$ - {k_y}{\overline a _x}$$

D. Zero