magnetic filed due to passing the current in solenoid coil

Question 1

experment on the solienoid

Answer 1

1. throw iron filling on a card boared surrounding soleniod carrying an electric current
2. knock the corner of the card board slightly
3. observation

• iron filling will be aranged as

1. the magnetic flux lines make complete circuit inside and out side he solenoid
2. the magnetic flux lines are parallel to its axis inside the coil so it will be perpemdicular to coils plane
3. it looks like a long bar magnet

Question 2

magnetic flux denisty a he axis of a solenoid is calcluted from the relation ……….

what is symbol n represent and rule and unit

Answer 2

1. B_{at axis} = µ x N x I / L_selenoid
2. n represent to number of turns per unit length , n=N/L_selenoid turns / meter

Question 3

factors which he magneic flux density at the axis of the solenoid depends on

and ratio

Answer 3

1. the elecric current inensity B & I at constant oher factor
2. the number of turns of the coil B&N at constant other factor
3. the length of the coil B & 1/L_coil at constant other factor
4. the magnetic permeability of the medium B&µ at constant other factor

ratio

B₁/B₂ =µ₁ / µ₂ x I₁ / I₂ x N₁/N₂ x L₂/L₁

Question 4

the dirction of the magnetic filed can be determined by using

Answer 4

1. small compass
2. ampere right hand rule
3. maxwell right hand screw rule
4. polarity

Question 5

lam tkon elfat lz2a fe b3d eh el relation

if the turns tanget what is the relation

Answer 5

B = µ x I / 2r_wire

Question 6

smpere right hand rule for soleniod

use and how to use

Answer 6

• use to detrmine the dirction of the magnetic flux line and the direction of the current

1. thump to direction of magnetic flux lines ( N )
2. other finger durction of current

Question 7

using of the small compass

Answer 7

when a small compass is placed in a mgnetic filed then trhe dirction of its poles will indicate the dirction of the magnetic flux lines

Question 8

use of maxwell ridht hand screw rule

Answer 8

spin a right screw in the dirction of the current

it will move in the directrion of the filed at the center of the coil

Question 11

use of polarity

Answer 11

the face of the coil where the current semms as it flow clock wise dirction is considered SOUTH pole while the other face where the current seems as ot flows anticlock wise direction is considerd NORTH pole