The direction of magnetic lines of force is________________?
The direction of magnetic lines of force is________________? A. from south pole to north poleB. from north pole to south pole C. from one end of the magnet to another D. none of the above
The direction of magnetic lines of force is________________? A. from south pole to north poleB. from north pole to south pole C. from one end of the magnet to another D. none of the above
A permeable substance is one_____________? A. which is a good conductor B. which is a bad conductor C. which is a strong magnetD. through which the magnetic lines of force can pass very easily
A magnetic field exists around____________? A. iron B. copper C. aluminiumD. moving charges
The materials having low retentivity are suitable for making_____________? A. weak magnetsB. temporary magnets C. permanent magnets D. none of the above
Tesla is a unit of_____________? A. field strength B. inductanceC. flux density D. flux
Ferrites are materials A. paramagnetic B. diamagneticC. ferromagnetic D. none of the above
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________? A. proportional to 7B. proportional to X C. proportional to distance between the conductors D. inversely proportional to I
Air gap has_________eluctance as compared to iron or steel path? A. littleB. lower C. higher D. zero
Which of the following is a vector quantity ? A. Relative permeabilityB. Magnetic field intensity C. Flux density D. Magnetic potential
A material which is slightly repelled by a magnetic field is known as_____________? A. ferromagnetic materialB. diamagnetic material C. paramagnetic material D. conducting material