moving charges and magneitism

Question 1

unit of magnetic field

Answer 1

unit= N/Am = Tesla(T) = Weber/m

Question 2

Magnetic field intensity

Answer 2

dB = u⁰/4Pi i(dĺ × ŕ)/r³

dB= u⁰/4Pi i dl sin @/r^2

where, dl = direction of current
r= disance of point from wire

Question 3

value of magnetic permeability (u⁰/4Pi)

Answer 3

value of magnetic permeability (u⁰/4Pi)= 10^-7 N/A^2

Question 4

Right hand palm rule- determining direction of B

Answer 4

thumb= direction of current
palm = direction of point

fingers = direction of B

Question 5

magnetic field due to circular current carrying loop

Answer 5

B net = u⁰/2 i/a

where a = radius of loop

Question 6

Magnetic field at axis of circular ring

Answer 6

B= ů/2 i R²/(R² + X²)^3/2

Question 7

magnetic field due to current carrying straight wire

Answer 7

B = u⁰/4Pi i/a [sin @1 + sin @2]

where, a = distance of point from wire
@1 = angle of point to one end of wire
@2 = angle of point to other end of wire

Question 8

ampere circuital law

Answer 8

{ B. dl = u⁰ i(inside)

Question 9

fleming’s left hand rule

Answer 9

used for finding force on charge
FBI

thumb = force
index finger = magnetic field
middle finger = current (motion of charge)

Question 10

work done on a charged particle in magnetic field is

Answer 10

zero

Question 11

lorentz force

Answer 11

net force on charge

F(net) = F(E) + F(M)