Electromagnetic Field Theory MCQ Questions & Answers

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51.
An electromagnetic wave is transmitted into a conducting medium of conductivity ?. The depth of penetration is

A. directly proportional to frequency

B. directly proportional to square root of frequency

C. inversely proportional to frequency

D. inversely proportional to square root of frequency

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52.
What is the effect of the earth's magnetic field in the reflected wave at frequencies in the vicinity of gyro-frequency?

A. No attenuation in the reflected wave

B. Decreased attenuation in the reflected wave

C. Increased attenuation in the reflected wave

D. Nominal attenuation in the reflected wave

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53.
For free space E = 50 cos(10⁸t + βx), then the value of β . . . . . . . .

A. 0.3333 rad/m

B. $$\frac{2}{3}$$

C. $$\frac{4}{3}$$

D. 0.316

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54.
The value of flux linkage is 6t³ at time t = 2 seconds. What is the emf of a material?

A. 70 units

B. 50 units

C. 36 units

D. 72 units

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55.
The depth of penetration of electromagnetic wave in a medium having conductivity σ at a frequency of 1 MHz is 25 cm. The depth of penetration at a frequency of 4 MHz will be

A. 6.25 cm

B. 12.50 cm

C. 50.00 cm

D. 100.00 cm

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56.
In a transmission line with ωL >> R and ωC >> G, Phase Shift constant β is proportional to

A. ω

B. ω²

C. $$\sqrt \omega $$

D. $$\frac{1}{{\sqrt \omega }}$$

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57.
In electromagnetic waves, polarisation is

A. due to transverse nature of waves

B. always vertical in isotropic medium

C. due to longitudinal nature of waves

D. caused by reflection of waves

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58.
The line impedance at voltage minimum is

A. Resistive

B. Capacitive

C. Inductive

D. Complex

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59.
For a plane wave propagating in an unbounded medium (say, free space), the minimum angle between electric field and magnetic field vectors is

A. 0°

B. 60°

C. 90°

D. 180°

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60.
An infinitely long uniform charge of density 30 nC/m is located at y = 3, z = 5. The field intensity at (0, 6, 1) is E = 64.7a_y - 86.3a_z V/m. What is the field intensity at (5, 6, 1)?

A. $$E$$

B. $$\left( {\frac{{{6^2} + {1^2}}}{{{5^2} + {6^2} + {1^2}}}} \right)E$$

C. $${\left( {\frac{{{6^2} + {1^2}}}{{{5^2} + {6^2} + {1^2}}}} \right)^{\frac{1}{2}}}E$$

D. $${\left( {\frac{{{5^2} + {6^2} + {1^2}}}{{{6^2} + {1^2}}}} \right)^{\frac{1}{2}}}E$$

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Electromagnetic Field Theory MCQ Questions & Answers | ECE

51. An electromagnetic wave is transmitted into a conducting medium of conductivity ?. The depth of penetration is

Answer & Solution

52. What is the effect of the earth's magnetic field in the reflected wave at frequencies in the vicinity of gyro-frequency?

Answer & Solution

53. For free space E = 50 cos(108t + βx), then the value of β . . . . . . . .

Answer & Solution

54. The value of flux linkage is 6t3 at time t = 2 seconds. What is the emf of a material?

Answer & Solution

55. The depth of penetration of electromagnetic wave in a medium having conductivity σ at a frequency of 1 MHz is 25 cm. The depth of penetration at a frequency of 4 MHz will be

Answer & Solution

56. In a transmission line with ωL >> R and ωC >> G, Phase Shift constant β is proportional to

Answer & Solution

57. In electromagnetic waves, polarisation is

Answer & Solution

58. The line impedance at voltage minimum is

Answer & Solution

59. For a plane wave propagating in an unbounded medium (say, free space), the minimum angle between electric field and magnetic field vectors is

Answer & Solution

60. An infinitely long uniform charge of density 30 nC/m is located at y = 3, z = 5. The field intensity at (0, 6, 1) is E = 64.7ay - 86.3az V/m. What is the field intensity at (5, 6, 1)?

Answer & Solution

Read More Section(Electromagnetic Field Theory)

51.
An electromagnetic wave is transmitted into a conducting medium of conductivity ?. The depth of penetration is

52.
What is the effect of the earth's magnetic field in the reflected wave at frequencies in the vicinity of gyro-frequency?

53.
For free space E = 50 cos(10⁸t + βx), then the value of β . . . . . . . .

54.
The value of flux linkage is 6t³ at time t = 2 seconds. What is the emf of a material?

55.
The depth of penetration of electromagnetic wave in a medium having conductivity σ at a frequency of 1 MHz is 25 cm. The depth of penetration at a frequency of 4 MHz will be

56.
In a transmission line with ωL >> R and ωC >> G, Phase Shift constant β is proportional to

57.
In electromagnetic waves, polarisation is

58.
The line impedance at voltage minimum is

59.
For a plane wave propagating in an unbounded medium (say, free space), the minimum angle between electric field and magnetic field vectors is

60.
An infinitely long uniform charge of density 30 nC/m is located at y = 3, z = 5. The field intensity at (0, 6, 1) is E = 64.7a_y - 86.3a_z V/m. What is the field intensity at (5, 6, 1)?