Electromagnetic Field MCQs with answers Page - 4

Here, you will find a collection of MCQ questions on Electromagnetic Field. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. capacitors can be used only for D.C.

  • (A) Air
  • (B) Paper
  • (C) Mica
  • (D) Electrolytic

A

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Q. capacitors are used in transistor circuits.

  • (A) Ceramic
  • (B) Paper
  • (C) Air
  • (D) Electrolytic

A

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Q. Capacitors are used for audio frequency and radio frequency coupling and tuning.

  • (A) Air
  • (B) Mica
  • (C) Plastic film
  • (D) Ceramic

A

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Q. The inverse of capacitance is called

  • (A) reluctance
  • (B) conductance
  • (C) susceptance
  • (D) elastance

A

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Q. When the dielectric is homogeneous,the potential gradient is

  • (A) uniform
  • (B) non-uniform
  • (C) zero
  • (D) any of the above

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Q. The potential gradient across the material of low permittivity is than across the material of high permittivity.

  • (A) smaller
  • (B) greater
  • (C) both (a) and (b)
  • (D) none of the above

A

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Q. field is associated with the capacitor.

  • (A) Electric
  • (B) Magnetic
  • (C) Both (a) and (b)
  • (D) None of the above

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Q. A capacitor having capacitance of 5 uF is charged to a potential difference of 10,000 V. The energy stored in the capacitor is

  • (A) 50 joules
  • (B) 150 joules
  • (C) 200 joules
  • (D) 250 joules

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Q. A single core cable used on 33000 V has conductor diameter 10 mm and the in¬ternal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is

  • (A) 62 x 105 V/m
  • (B) 72 x 105 V/m
  • (C) 82 x 105 V/m
  • (D) 92 x 105 V/m

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Q. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleration of an electron placed between them is

  • (A) 0.56 x 1015 m/s2
  • (B) 1.5 x 1015 m/s2
  • (C) 1.6 x 1015 m/s2
  • (D) 1.76 x 1015 m/s2

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