EE8301 Electrical Machines - I IAT-I

flux =

• MMF/Reluctance

• Reluctance/MMF

• permeance/MMF

• Reluctance/permeance

Fleming's Right hand rule used to

• find out direction of induced emf

• find out direction of flux

• find out direction of rotation

• find out direction of current

Fleming's Left hand rule used to

• find out direction of induced emf

• find out direction of flux

• find out direction of rotation

• find out the direction of current

force acting on a current carrying conductor

• BIL

• BLV

• BIV

• BAS

MMF =

• NI/L

• NI/Pi

• NPi/L

• NL/i

What are the magnetic losses

• Eddy Current and Hysteresis losses

• Eddy current and Copper losses

• Hysteresis and Copper losses

• Core and Copper losses

unit for Reluctance

• AT/wb

• Wb/AT

• flux/unit area

• Tesla

obtain the maximum possible mutual inductance between two conductors of inductance 20H and 5H

• 10 H

• 20 H

• 5 H

• 15 H

MMF = 1400 AT and Flux = 0.828mwb. Find Reluctance

• 1.79*10^6 AT/wb

• 1.69*10^6 AT/wb

• 1.89*10^6 AT/wb

• 1.99*10^6 AT/wb

Lenz's law is used to find out

• direction of the counter current

• direction of motion

• direction of flux

• direction of voltage