Computer Programming MCQs

5739 MCQs  (Page 192 of 574)

Fleming’s left hand rule is used to find_________________?
A. Direction of magnetic field due to current carrying conductor
B. Direction of flux in a solenoid
C. Direction of force on a current carrying conductor in a magnetic field
D. Polarity of a magnetic pole
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
Which of the following is a vector quantity ?
A. Relative permeability
B. Magnetic field intensity
C. Flux density
D. Magnetic potential
The two conductors of a transmission line carry equal current I in opposite directions. The force on each conductor is________________?
A. Proportional to 7
B. Proportional to x
C. Proportional to distance between the conductors
D. Inversely proportional to i
Ferrites are materials
A. Paramagnetic
B. Diamagnetic
C. Ferromagnetic
D. None of the above
Tesla is a unit of_____________?
A. Field strength
B. Inductance
C. Flux density
D. Flux
The materials having low retentivity are suitable for making_____________?
A. Weak magnets
B. Temporary magnets
C. Permanent magnets
D. None of the above
A magnetic field exists around____________?
A. Iron
B. Copper
C. Aluminium
D. Moving charges
A permeable substance is one_____________?
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