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MCQs

Total Questions : 441 | Page 40 of 45 pages
Question 391. . When the dielectric is homogeneous, the potential gradient is
  1.    uniform
  2.    200 to 1600 volts
  3.    2000 to 3000 volts
  4.    more than 10000 volts
 Discuss Question
Answer: Option A. -> uniform
Question 392. 3. Two infinite parallel plates 10 mm apart have maintained between them a potential difference of 100 V. The acceleratial difference of 100 V. The acceleration of an electron placed between them is
  1.    0.56 x 1015 m/s2
  2.    1.5 x 1015 m/s2
  3.    1.6 x 1015 m/s2
  4.    1.76 x 1015 m/s2
 Discuss Question
Answer: Option D. -> 1.76 x 1015 m/s2
Question 393. 5. If the relative permitivity of mica is 5,its absolute permittivity is
  1.    44.27 x 10-12 F/m
  2.    44.27x 10-11 F/m
  3.    4427 x l0
  4.    4427 x 10-9 F/m
 Discuss Question
Answer: Option A. -> 44.27 x 10-12 F/m
Question 394. 0. The potential gradient across the material of low permittivity is than across the material of high permittivity.
  1.    smaller
  2.    greater
  3.    both and
  4.    none of the above
 Discuss Question
Answer: Option B. -> greater
Question 395. 4. The total deficiency or excess of electrons in a body is known as
  1.    current
  2.    voltage
  3.    potential gradient
  4.    charge
 Discuss Question
Answer: Option D. -> charge
Question 396. 2. A single core cable used on 33000 V has conductor diameter 10 mm and the internal diameter of sheath 25 mm. The maximum electrostatic stress in the cable is
  1.    62 x 105 V/m
  2.    72 x 105 V/m
  3.    82 x 105 V/m
  4.    92 x 105 V/m
 Discuss Question
Answer: Option B. -> 72 x 105 V/m
Question 397. 1. A capacitor having capacitance of 5 tif is charged to a potential difference of 10,000 V. The energy stored in the capacitor is
  1.    50 joules
  2.    150 joules
  3.    200 joules
  4.    250 joules
 Discuss Question
Answer: Option D. -> 250 joules
Question 398. 6. The direction of the lines of force at any point is the direction along which a unit charge placed at that point
 Discuss Question
Answer: Option D. -> 250 joules
Question 399. 7. It was suggested by that the electric field should be imagined to be divided into tubes of force containing a fixed number of lines of force.
  1.    Kelvin
  2.    Newton
  3.    Faraday
  4.    All of the above
 Discuss Question
Answer: Option C. -> Faraday
Question 400. 0. A point charge of 10-9 C is placed at a point A in a free space. The intensity of electrostatic field on the surface of a sphere of radius 50 mm and centre A is given by
  1.    2000 V/m
  2.    3000 V/m
  3.    3151 V/m
  4.    3595 V/m
 Discuss Question
Answer: Option D. -> 3595 V/m

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