A. protect the line
B. open the circuit
C. protect the appliance
D. prevent excessive currents
E. none of the above
A. from south pole to north pole
B. from north pole to south pole
C. from one end of the magnet to another
D. none of the above
A. which is a good conductor
B. which is a bad conductor
C. which is a strong magnet
D. through which the magnetic lines of force can pass very easily
A. iron
B. copper
C. aluminium
D. moving charges
A. weak magnets
B. temporary magnets
C. permanent magnets
D. none of the above
A. field strength
B. inductance
C. flux density
D. flux
A. paramagnetic
B. diamagnetic
C. ferromagnetic
D. none of the above
A. proportional to 7
B. proportional to X
C. proportional to distance between the conductors
D. inversely proportional to I
A. little
B. lower
C. higher
D. zero
A. Relative permeability
B. Magnetic field intensity
C. Flux density
D. Magnetic potential