DC MOTOR

DC MOTOR CONVERTS ------- ENERGY INTO ----------ENERGY

• MECHANICAL, ELECTRICAL

• ELECTRICAL, MECHANICAL

• KINETIC, POTENTIAL

THE WORKING PRINCIPLE OF DC MOTOR IS---------

• MUTUAL INDUCTION

• FLEMING'S RIGHT HAND

• LORENTZ LAW

WHICH DEVICE IS CONSTRUCTION-WISE THE SAME AS DC MOTOR?

• DC GENERATOR

• TRANSFORMER

• INDUCTOR

AS PER FLEMING'S LEFT-HAND RULE THUMB FINGER SHOWS THE

• DIRECTION OF MAGNETIC FIELD

• DIRECTION OF CURRENT

• DIRECTION OF FORCE

AS PER FLEMING'S LEFT-HAND RULE INDEX FINGER SHOWS THE

• DIRECTION OF FORCE

• DIRECTION OF MAGNETIC FIELD

• DIRECTION OF CURRENT

AS PER FLEMING'S LEFT-HAND RULE MIDDLE FINGER SHOWS THE---------

• DIRECTION OF FORCE

• DIRECTION OF MAGNETIC FIELD

• DIRECTION OF CURRENT

WHAT IS TORQUE?

• TWISTING FORCE

• KINETIC FORCE

• MAGNETIC FORCE

WHAT IS BACK EMF?

• THE VOLTAGE OPPOSES THE SUPPLY VOLTAGE

• THE VOLTAGE DOES NOT OPPOSE THE SUPPLY VOLTAGE

• SUPPLY VOLTAGE

BACK EMF OF DC MOTOR IS----------

• Eb = PΦNZ / 60A

• EB = PΦN / 60AZ

• EB = PΦZ / 120AN

GENERATOR CONVERTS ------ ENERGY INTO ----- ENERGY

• MECHANICAL, ELECTRICAL

• ELECTRICAL, MECHANICAL

• POTENTIAL,KINETIC