magnetic effect of current

Question 1

Concept of Magnetic Field

Answer 1

if magnet is placed in a magnetic field, then it experiences a force on it, Also, when a
magnet is placed near a current carrying conductor, then it experiences the similar force,
it means that current carrying conductor produces a magnetic field around it.

Question 2

biot savart’s law

Answer 2

dB=µ0 i dl sin@/4πr^2

Question 3

magnetic field due to long straight current carrying conductor

Answer 3

B=µ0I{sin@1+sin@2}/4πr

Question 4

magnetic field at the centre of the loop for N turns

Answer 4

B=µ0N*I/2R

Question 5

axis of circular loop

Answer 5

B=µ0NIR^2/2(R^2+r^2)^3/2

Question 6

ampere circuital law

Answer 6

∮B.dl=µ0*I

Question 7

. Magnetic Field due to a Thick (Cylindrical) Wire

Answer 7

Magnetic field at a point
outside the wire
B=µ0Ir/2πR^2(r

Question 8

Magnetic Field due to a Solenoid

Answer 8

A current carrying
solenoid behaves as a bar
magnet.For such a solenoid, the magnetic field inside it is uniform
and directed axially.

Question 9

● For a solenoid coil of infinite length at a point on its

axial line, the magnetic field,

Answer 9

B=µ0ni

n is number of turns per unit length.

Question 10

At the end of solenoid,

Answer 10

B=µ0ni/2
At the end field is half of at the centre, this is called
end effect.

Question 11

Toroidal Solenoids

Answer 11

For a toroid (i.e. a ring shaped closed solenoid) magnetic
field at any point within the core of toroid
B=µ0ni
n=N/2πR, radius of a toriod