Electronic Engineering MCQ Question Papers: ENTC, IT Interview Placement

Subject: Electromagnetic and Transmission Lines 2

**Part 2: List for questions and answers of **
**Electromagnetic**** & Transmission Line**

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**Q1. Which among the following represents a scalar quantity?**

**a) Velocity**

**b) Momentum**

**c) Force**

**d) Potential**

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**Q2. Basically, the flux lines which are represented by the lines of force are regarded as ****_________**

**a) Branch lines**

**b) Node lines**

**c) Stream lines**

**d) Loop lines**

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**Q3. Consider the equation given below. What does it represent from the following? **

**Equation:
D = (∂D_{x} / ∂x) + (∂D_{y} / ∂y) + (∂D_{z} / ∂z)
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**a) Divergence in Cartesian system**

**b) Divergence in Cylindrical system**

**c) Divergence in Spherical system**

**d) None of the above**

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**Q4. Which form of Gauss’s law is regarded as Maxwell’s first equation?**

**a) Point form**

**b) Line form**

**c) Angular form**

**d) Exponential form**

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**Q5. Under which category of charge distribution does the cathode ray tube belong to?**

**a) Point Charge**

**b) Line Charge**

**c) Surface Charge**

**d) Volume Charge**

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**Q6. What kind of function is an electric field intensity with respect to the value of charge?**

**a) Linear**

**b) Angular**

**c) Delta**

**d) Sinc **

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**Q7. At which point it becomes necessary to determine the electric field intensity?**

**a) Field Point**

**b) Source Point**

**c) Sink Point**

**d) Static Point**

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**Q8. An electric field exhibits variation corresponding to _________**

**a) Position**

**b) Time**

**c) Both a and b**

**d) None of the above**

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**Q9. How does the short-circuited line behave for the first ?/4 distance if input impedance is ****purely reactive?**

**a) As an inductance**

**b) As a resistance**

**c) As a capacitance**

**d) As a conductance**

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**Q10. What would be the Standing Wave Ratio (SWR) for a line with reflection coefficient ****equal to 0.49?**

**a) 0.01**

**b) 2.12**

**c) 2.921**

**d) 3.545**

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**Q11. Which operation is performed over the in phase incident and reflected waves in order ****to obtain maximum voltage of SWR?**

**a) Addition**

**b) Subtraction**

**c) Differentiation**

**d) Integration**

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**Q12. Which parameter is much larger than the resistance at radio frequencies in RF circuits?**

**a) Inductive reactance**

**b) Capacitive susceptance**

**c) Shunt conductance**

**d) Series admittance **

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**Q13. Which primary constant of transmission line is exhibits its dependency of value on the ****cross-sectional area of conductors?**

**a) Resistance (R)**

**b) Inductance (I)**

**c) Conductance (G)**

**d) Capacitance (C)**

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**Q14. If the rate of attenuation is high for good conductors at radio frequency, where does ****an input wave get reduced to?**

**a) Zero**

**b) Infinity**

**c) Minor proportion of its initial strength value**

**d) Major proportion of its final strength value**

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**Q15. Maxwell’s second equation of static field is a point form of _________**

**a) Ampere’s circuital law**

**b) Guass’s law**

**c) Lenz law**

**d) Biot Savart law**

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**Q16. Which form of Maxwell’s equation specifies the fundamental relationship between the ****electric and magnetic fields in time varying field?**

**a) Point form**

**b) Integral form**

**c) Exponential form**

**d) None of the above**

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**Q17. Which nature of applied voltage results in the flow of conduction current in the ****displacement current concept?**

**a) Constant**

**b) Variable**

**c) Both a and b**

**d) None of the above**

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**Q18. In Ampere’s circuital law, what is the purpose of an ‘Amperian Path’?**

**a) Computation of magnetic field intensity**

**b) Determination of differential element of path length**

**c) Estimation of electric flux density**

**d) Detection of loop in a constant plane **

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**Q19. What is the direction of magnetic field intensity vector due to infinite long straight ****filament?**

**a) Radial**

**b) Elliptical**

**c) Parabolic**

**d) Circumferential**

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**Q20. Objectives of electrical power transmission is/are**

**a) Transmission system must be more efficient with minimum line losses**

**b) Voltage regulation of the transmission line must be zero or minimum**

**c) both 1 and 2**

**d) nether 1 nor 2 **

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**Part 2: List for questions and answers of Electro Magnetics & Transmission Line**

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**Q1. Answer: d**

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**Q2. Answer: c**

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**Q3. Answer: a**

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**Q4. Answer: a**

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**Q5. Answer: d**

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**Q6. Answer: a**

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**Q7. Answer: a**

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**Q8. Answer: c**

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**Q9. Answer: a**

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**Q10. Answer: c**

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**Q11. Answer: a**

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**Q12. Answer: a**

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**Q13. Answer: a**

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**Q14. Answer: c**

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**Q15. Answer: a**

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**Q16. Answer: a**

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**Q17. Answer: b**

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**Q18. Answer: a**

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**Q19. Answer: d**

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**Q20. Answer: c**