torque acting on rectangle coil

Question 1

diff motor effect

Answer 1

changing the electric energy int kinetic energy

Question 2

1. two forces equel in magnitude and opposite in direction and have the same line of axtion causes
   
   1. two forces equel in magnitude and opposite in direction and have the do not same line of axtion profuces

Answer 2

1. equlibrium
2. couple causes rotation

Question 3

the moment of couple [tourqe] =

and unit

Answer 3

the force x the vrtical distance between them

Nxm

NOTE ; these unit not = joule

Question 4

the torque increases by increases

Answer 4

1. the force
2. the vertical distance between them

Question 5

proff on the relation of tourqe acting on rectangle coil

Answer 5

draw in page 85

consider rectangle coil of dimension [L_ab , L_bc]

two sides of length [L_bc] wil not be affected by force because they are parallel to the magnetic flux

while

two sides of length [L_ab] wil be affected by two equel forces opposite in direction and donot have same line of action

SO torque takes place

t = F x L_bc L_bc⇒distance between them

t = B x I x Lab x Lbc

t = BxIxA

from [N] number of turns

T = BxIxAxN SIN seta

Question 6

diff seta in the relation of tourqe acting on reactangle coil

Answer 6

it is the angle between the normal to the coils plane and the magnetic flux lines

Question 7

magnetic dipole moment

diff and unit and relation

Answer 7

1. it is a vector emanating from the north pole of the coil perpendculer to the coils plane [the direction of the filed from inside the coil]
2. AMP x m²
3. = IAN

NOTE its diorection can be detect in direction of advancyng [motion] of a right hand screw if it was twisted in the direction of the current

Question 8

the magnetic torque acting on rectangular coil carrying electric current placed in an extrnal filed depends on

Answer 8

1. magnetic flux density t&B at constant other factors
2. the electric current intensity t&I at constant other factors
3. area of the coil t&A at constant other factors
4. the number of turns of the coil t&N at constant other factors
5. the angle between the normal to the coils plane and a magnetic flux lines t&SIN seta at constant other factors

Question 9

the torque acting on a rectangle coil carrying electric current placed in an external magnetic filed when it be

maximum

zero

Answer 9

1. the coils plane parallel to the magnetic flux lines set = 90 , SIN 90 = 1 , t = BIAN
2. the coils plane perpendculer to the magnetic flux lines set = 0 , SIN 0 = 0 , t = BIAN SIN seta = 0

Question 10

torque acts on rectangle coil carrying electric current placed in a magnetic filed GR

Answer 10

because two its sides will be affected by two equel magnetic forces opposite in direction and dont have same line of action

Question 11

tourqe may not act on revtangle coil carrying electric current placed in a magnetic filed GR

Answer 11

when the coils plane perpendculer to the magnetic flux lines set = 0 , SIN 0 = 0 , t = BIAN SIN seta = 0