Q.1 The force responsible for the flow of flux or generation of flux is known as___.
A. EMF
B. MMF
C. Potential difference
D. all of the above
Ans.: B
Q. 2 Full form of MMF
A. Magneto motive force
B. magnetizing motive force
C. Magneto motion force
D. magnet motion force
Ans.: A
Q.3 MMF is measured in ____.
A. Ampere turns
B. pole strength
C. Ampere
D. none of the above
Ans.: A
Q.4 The magnetic field strength is decided by___.
A. magnetic field
B. magnetic pole
C. MMF
D. Magnetic lines of force
Ans.: C
Q. 5______ is also defined as work done on a unit magnetic pole to take it around a closed magnetic circuit once.
A. Magnetic field strength
B. MMF
C. Magnetic lines of force
D. all of the above
Ans.: B
Q. 6 ____ is defined as the opposition to the flow in a material.
A. Resistance
B. Reluctance
C. specific resistance
D. none of the above
Ans.: B
Q. 7 _____ is similar to the ____ in the flow of electric current in an electric circuit.
A. Resistance, resistance
B. Reluctance, reluctance
C. Resistance, reluctance
D. Reluctance, resistance
Ans.: D
Q. 8 Reluctance of a material is directly proportional to the _____ and inversely proportional to its _____.
A. area, length
B. length, cross sectional area
C. Cross sectional area, volume
D. length, volume
Ans.: B
Q. 9 Reluctance is measured in___.
A. Ampere/ Weber
B. Ampere/ meter
C. Weber/ Ampere
D. Weber
Ans.: A
Q. 10 Reluctance can also be defined as the ratio of ____ and the ___.
A. MMF, field
B. MMF, flux
C. flux, MMF
D. Flux, field
Ans.: B
Q. 11 ____ is reciprocal of reluctance.
A. resistance
B. conductance
C. Permeance
D. none of the above
Ans.: C
Q. 12 The___ is the property of a magnetic material to allow the flux to pass through it.
A. conductance
B. Permeance
C. Resistance
D. conductivity
Ans.: B
Q. 13 Permeance is measured in____.
A. Ampere/Weber
B. Tesla
C. Weber/ Ampere
D. Weber
Ans.: C
Q. 14 ____ is defined as the closed path followed by the magnetic lines of force.
A. Electric circuit
B. Magnetic circuit
C. Electromagnetic circuit
D. Any of the above
Ans.: B
Q. 15 ____ is similar to ___ in electric circuit.
A. current, flux
B. Flux, reluctance
C. Flux, Current
D. current, resistance
Ans.: C