List the main parts of D.C. motor Answer : Main parts of D.C. motor and their functions: Part Functions Yoke i) Provides mechanical support for poles. ii) Acts as protecting cover for machine. iii) Carries magnetic flux. ... a fixed physical position relative to the stator. Shaft Used to transfer mechanical power ...
State the principle of operation of d.c. motor. Answer : When a current carrying conductor is placed in a magnetic field, the conductor experiences the force. The magnitude of force is given by F = BIL newton where F – Force B – maximum flux density I – Current L – Length of conductor...
State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor. Answer : Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows: 1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine ...
Write applications of each of the following:(i) Fuse (ii) MCB (iii) MCCB. Answer : i) Applications of fuse: * Used in domestic installations to provide short circuit protection. * Used in commercial / Industrial installations to provide overload and short circuit protection. * Used in ... * Rectifiers panels, * U.P.S, Electronic equipment, * Motors, * Furnaces...
Briefly define each of the following: (a) 1 coulomb (b) 1 volt (c) 1 ampere (d) 1 ohm.
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