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AMPERES LAW MCQs

Total Questions : 20 | Page 2 of 2 pages
Question 11. Ampere's Law helps us
  1.    calculate the magnetic field produced by a straight conductor when a current is run through it
  2.    calculate the current produced by a straight conductor when a magnetic field is present
  3.    calculate the magnetic field produced by any shape conductor when a current is run through it
  4.    calculate the amount of resistance in a wire when current is passed through it
 Discuss Question
Answer: Option C. -> calculate the magnetic field produced by any shape conductor when a current is run through it
Question 12. What is the magnitude of magnetic field in empty space of toroid?
  1.    µ0nI
  2.    µ0nI/2
  3.    nI
  4.    zero
 Discuss Question
Answer: Option D. -> zero
Question 13. When Ampere ran current through 2 parallel wires in the same direction,
  1.    the wires attracted
  2.    the wires repelled
  3.    the wires flew away
  4.    the wires exploded
 Discuss Question
Answer: Option A. -> the wires attracted
Question 14. When Ampere ran current through 2 parallel wires in the opposite direction,
  1.    the wires attracted
  2.    the wires repelled
  3.    the wires flew away
  4.    the wires exploded
 Discuss Question
Answer: Option B. -> the wires repelled
Question 15. Ampere's law states that B = μ0I / 2πr
  1.    people want to see wires move
  2.    it allows people to calculate a magnetic field as long as they know how much current there is and the radius of a conductor
  3.    it allows people to calculate a magnetic field as long as they know how much current there is and the length of a wire
  4.    it allows people to calculate the amount of current passing through as long as they know the magnetic field strength and the radius of a conductor
 Discuss Question
Answer: Option B. -> it allows people to calculate a magnetic field as long as they know how much current there is and the radius of a conductor
Question 16. Ampere's law states that B = μ0I / 2πr
  1.    Ampere's number
  2.    Ampere's constant
  3.    the permeability of closed space
  4.    the permeability of free space
 Discuss Question
Answer: Option D. -> the permeability of free space
Question 17. What is the magnitude of a magnetic field from a 3
  1.    1.0 * 10-5 T
  2.    1.5 * 10-5 T
  3.    2.1 * 10-5 T
  4.    2.2 * 10-4 T
 Discuss Question
Answer: Option A. -> 1.0 * 10-5 T
Question 18. According to Ampere's cIrcuital law, The Line Integral of H about any closed path is exactly _______ to the direct current enclosed by that path
  1.    4 times
  2.    equal
  3.    double
  4.    half
 Discuss Question
Answer: Option B. -> equal
Question 19. What is the magnitude of a magnetic field in the core of a 6
  1.    0.01 T
  2.    0.11 T
  3.    0.45 T
  4.    0.85 T
 Discuss Question
Answer: Option B. -> 0.11 T
Question 20. The mathematical expression for Amperes circuital law:
  1.    ∮Bdl = μ0 I
  2.    ∮Bxdl = μ0 I
  3.    ∮B.dl = μ0 I
  4.    ∮Bdl = μ0 I/r
 Discuss Question
Answer: Option C. -> ∮B.dl = μ0 I

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