1) 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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2) 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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3) 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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4) 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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5) 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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6) Consider the equation given below. What does it represent from the following?
Equation: ▾.D = (∂Dx / ∂x) + (∂Dy / ∂y) + (∂Dz / ∂z)
a. Divergence in Cartesian system
b. Divergence in Cylindrical system
c. Divergence in Spherical system
d. None of the above
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7) What does an arrow indicate in the diagram shown below?
a. Displacement Vector
b. Velocity Vector
c. Viscocity Vector
d. Acceleration Vector
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8) 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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9) Which among the following represents a scalar quantity?
a. Velocity
b. Momentum
c. Force
d. Potential
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10) If a point 'P' has spherical coordinates (r = 5000, θ = 0°, ∅ = 0°), then what will be its equivalent value (x,y,z) in Cartesian co-ordinate system?
a. (5000, 0, 0)
b. (0, 5000, 0)
c. (0, 0, 5000)
d. (0, 0, 0)
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11) Consider a point charge of about 10nC is located at origin. If V = 4V at (0,5,7) and point A (-6,4,12), then what would be the value of potential at point B (2,10,14)?
a. 1.261 V
b. -1.261 V
c. 2.696 V
d. -2.696 V
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12) According to the definition of dielectric strength of dielectric medium, which value of electric field give rise to an occurrence of dielectric breakdown phenomenon?
a. Maximum
b. Minimum
c. Initial
d. Final
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13) If the magnitude of E for a dielectric material is 0.12 mV/m along with electric susceptibility of about 4, what would be the magnitude of polarization?
a. 2.20 x 10-15 c/m2
b. 3.89 x 10-15 c/m2
c. 4.24 x 10-15 c/m2
d. 5.64 x 10-15 c/m2
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14) For an estimated value of polarization (P) = 4 .42 x 10-10 c/m2 and the availability of 4 x 1018 dipoles/m3, what will be the value of average dipole moment for dielectric material?
a. 0.05 x 10-28
b. 1.105 x 10-28
c. 1.205 x 10-28
d. 1.405 x 10-28
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15) Which type of capacitor possesses magnitude of flux density equivalent to its surface charge density?
a. Parallel Plate capacitor
b. Spherical Capacitor
c. Co-axial cable capacitor
d. None of the above
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16) If the medium is different than air, then what would be the equation of capacitance for a co-axial cable capacitor?
a. C = ε0 εr A / d
b. C = 4π ε0 εr [ab / a - b]
c. C = 2π ε0 εr L / ln (b/a)
d. C = 2π ε0 εr R
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17) Consider the assertions given below. Which of them represent/s the precise condition/s of Ampere's circuital law for the evaluation of magnetic field intensity?
A. If H is tangential to the path, then its value must be different at all the points
B. At each point on closed path, H is either tangential or normal to the path
a. A is true and B is false
b. A is false and B is true
c. Both A & B are true
d. Both A & B are false
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18) If a conductor with length of 5m is located along z-direction with a current of about 3A in az direction & B = 0.04 ax (T), then what would be the value of force experienced by conductor?
a. 0.6ax N
b. 0.6ay N
c. 0.6az N
d. None of the above
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19) According to Maxwell's first equation in a point form for the static field, the electric flux per unit volume by leaving a small value is equal to __________
a. Zero
b. Current density
c. Volume charge density
d. Magnetic field intensity
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20) How is the relation between energy transfer and the electric and magnetic fields specified?
a. By Poynting theorem
b. By Stoke's theorem
c. By Helmholtz theorem
d. By Lagrange's theorem
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21) The ratio of magnitudes of electric field intensity to the magnetic field intensity is regarded as ________
a. Intrinsic Impedance
b. Characteristic Impedance
c. Both a and b
d. None of the above
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22) What would be the depth of penetration for copper at 2 MHz frequency with σ = 5.8 x 107?
a. 46.72 μm
b. 56.90 μm
c. 66.08 μm
d. 76.34 μm
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23) For a transmission line with propagation constant γ = 0.650 + j 2.55, what will be the value of phase velocity for 1 kHz frequency?
a. 1.18 x 103 km/sec
b. 1.50 x 103 km/sec
c. 2.46 x 103 km/sec
d. 4.58 x 103 km/sec
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24) Which lossless element is inserted between source and load in addition to an ideal transformer in order to reduce the effect of reflection loss phenomenon by image matching?
a. Amplitude shifter
b. Phase shifter
c. Frequency divider
d. Voltage divider
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25) What is the phase variation range for reflection coefficient in the transmission lines?
a. 0° to 90°
b. 90° to 150°
c. 0° to 180°
d. 90° to 360°
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26) After what wavelength does the nature of graph get reversed for the input impedance of open-circuited line?
a. λ/2
b. λ/4
c. λ/8
d. λ/16
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27) If the quarter line is short-circuited, then it acts as _______
a. Conductor
b. Insulator
c. Semiconductor
d. Power regulator
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28) According to Smith diagram, where should be the position of reflection coefficient value for a unity circle with unity radius?
a. On or inside the circle
b. Outside the circle
c. Both a and b
d. None of the above
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29) The constant x-circles of Smith chart becomes smaller due to increase in the value of 'x' from ______
a. 0 to π
b. 0 to 2π
c. 0 to π /2
d. 0 to ∞
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