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MCQs

Total Questions : 573 | Page 1 of 58 pages
Question 1. The resistivity of the conductor depends on
  1.     none of these.
  2.     type of material.
  3.     area of the conductor.
  4.     length of the conductor.
 Discuss Question
Answer: Option B. ->  type of material.
Question 2. A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is
  1.     0.05 F
  2.     0.2 F
  3.     0.5 F
  4.     0.02 F
 Discuss Question
Answer: Option D. ->  0.02 F
Question 3. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is
  1.     1.6 × 10 - 19
  2.     0.625 × 10 - 19
  3.     1.6 × 1019
  4.     0.625 × 1019
 Discuss Question
Answer: Option D. ->  0.625 × 1019
Question 4. How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?
  1.     60
  2.     600
  3.     1200
  4.     10
 Discuss Question
Answer: Option B. ->  600
Question 5. The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be
  1.     8R Ω
  2.     4R Ω
  3.     R Ω
  4.     2R Ω
 Discuss Question
Answer: Option A. ->  8R Ω
Question 6. Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be
  1.     25 µF
  2.     1 µF
  3.     10 µF
  4.     5 µF
 Discuss Question
Answer: Option B. ->  1 µF
Question 7. 1 F is theoretically equal to
  1.     ratio of 1 C to 1 V
  2.     1 ohm of resistance
  3.     ratio of 1 V to 1 C
  4.     none of these
 Discuss Question
Answer: Option A. ->  ratio of 1 C to 1 V
Question 8. The unit of resistivity is
  1.     Ω / metre.
  2.     Ω / m².
  3.     Ω.
  4.     Ω - metre.
 Discuss Question
Answer: Option D. ->  Ω - metre.
Question 9. Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be
  1.     10 µF
  2.     160 µF
  3.     5 µF
  4.     40 µF
 Discuss Question
Answer: Option B. ->  160 µF
Question 10. To obtain a high value of capacitance, the permittivity of dielectric medium should be
  1.     high
  2.     zero
  3.     low
  4.     unity
 Discuss Question
Answer: Option A. ->  high

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