A. low coercivity
B. high susceptibility
C. both of the above
D. none of the above
Related Mcqs:
- The attraction capacity of electromagnet will increase if the_______________?
A. core length increases i
B. core area increases
C. flux density decreases
D. flux density increases - 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 ?
A. 2500 AT/m
B. 250 AT/m
C. 25 AT/m
D. 2.5 AT/m - A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?
A. Decreases
B. Increases
C. Remains same
D. First increases and then decreases depending on the depth of iron in¬sertion - The initial permeability of an iron rod is________________?
A. the highest permeability of the iron rod
B. the lowest permeability of the iron rod
C. the permeability at the end of the iron rod
D. the permeability almost in non-magnetised state - Magnetic moment is a_____________?
A. pole strength
B. universal constant
C. scalar quantity
D. vector quantity - The Biot-savart’s law is a general modification of_______________?
A. Kirchhoffs law
B. Lenz’s law
C. Ampere’s law
D. Faraday’s laws - Susceptibility is positive for______________?
A. non-magnetic substances
B. diamagnetic substances
C. ferromagnetic substances
D. none of the above - Substances which have permeability less than the permeability of free space are known as_____________?
A. ferromagnetic
B. paramagnetic
C. diamagnetic
D. bipolar - The main constituent of permalloy is_____________?
A. cobalt
B. chromium
C. nickel
D. tungsten - A material which is slightly repelled by a magnetic field is known as_____________?
A. ferromagnetic material
B. diamagnetic material
C. paramagnetic material
D. conducting material
