officerpath@gmail.com Hyderabad, Pakistan
Login Register
Latest Jobs CSS 2025 PMS CCE Sindh FPSC PPSC MCQs Past Papers Current Affairs Scholarships Admissions Downloads Roll No. Slips Results
Electrical Engineering

Magnetism And Electromagnetism MCQs

Practice Magnetism And Electromagnetism MCQs for competitive exams.

Magnetism And Electromagnetism MCQs

Practice questions from this topic.

Which of the following is expected to have the maximum permeability ?

  1. A. Brass
  2. B. Copper
  3. C. Zinc
  4. D. Ebonite
Report Error

The attraction capacity of electromagnet will increase if the

  1. A. core length increases i
  2. B. core area increases
  3. C. flux density decreases
  4. D. flux density increases
Report Error

The main constituent of permalloy is

  1. A. cobalt
  2. B. chromium
  3. C. nickel
  4. D. tungsten
Report Error

Unit for quantity of electricity is

  1. A. ampere-hour
  2. B. watt
  3. C. joule
  4. D. coulomb
Report Error

The initial permeability of an iron rod is

  1. A. the highest permeability of the iron rod
  2. B. the lowest permeability of the iron rod
  3. C. the permeability at the end of the iron rod
  4. D. the permeability almost in non-magnetised state
Report Error

The working of a meter is based on the use of a permanent magnet. In order to protect the meter functioning from stray magnetic fields

  1. A. meter is surrounded by strong magnetic fields
  2. B. a soft iron shielding is used
  3. C. a plastic shielding is provided
  4. D. a shielding of anon-magnetic material is used
Report Error

A 200 turn coil having an axial length of 30 mm and a radius of 10 mm is pivoted in a magnetic field having a flux density of 0.8 T. If the coil carries a current of 0.5 A, the torque acting on the coil will be [Hint. Torque = 2BIlNr N-m]

  1. A. 8 N-m
  2. B. 0.48 N-m
  3. C. 0.048 N-m
  4. D. 0.0048 N-m
Report Error

The unit of relative permeability is

  1. A. henry/metre
  2. B. henry
  3. C. henry/sq. m
  4. D. it is dimensionless
Report Error

If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity

  1. A. less than that of disc but in opposite direction
  2. B. equal to that of disc and in the same direction
  3. C. equal to that of disc and in the opposite direction
  4. D. less than that of disc and in the same direction
Report Error

The electromagnet has 50 turns and a current of 1A flows through the coil. If the length of the magnet circuit is 200 mm, what is the magnetic field strength?

  1. A. 2500 AT/m
  2. B. 250 AT/m
  3. C. 25 AT/m
  4. D. 2.5 AT/m
Report Error

The bar magnet has

  1. A. the dipole moment
  2. B. monopole moment
  3. C. (A) and (B) both
  4. D. none of the above
Report Error

Tesla is a unit of

  1. A. field strength
  2. B. inductance
  3. C. flux density
  4. D. flux
Report Error