Advertisements
Advertisements
Question
The magnetic field due to the earth has a horizontal component of 26 μT at a place where the dip is 60°. Find the vertical component and the magnitude of the field.
Advertisements
Solution
Given :
Horizontal component of Earth's magnetic field, B = 26 μT
Angle of dip, δ = 60°
The horizontal component of Earth's magnetic field `(B_H)` is given by
`B_H = Bcosδ`
Here,
B = Total magnetic field of Earth
On substituting the respective values, we get
`26 xx 10^-6 = B xx 1/2`
⇒ B = `52 xx 10^-6 = 52 "uT"`
The vertical component of Earth's magnetic field `(B_y)` is given by
`B_y = Bsinδ`
⇒ `B_y = 52 xx 10^-6 xx (sqrt(3))/2`
⇒ `B_y = 44.98 "uT" = 45 "uT"`
APPEARS IN
RELATED QUESTIONS
State how magnetic susceptibility is different for the three types of magnetic materials, i.e. diamagnetic, paramagnetic and ferromagnetic materials
Magnetic scalar potential is defined as `U(vec r_2) - U(vec r_1) = - ∫_vec(r_1)^vec(r_2)` `vec (B) . dvec(l)`
Apply this equation to a closed curve enclosing a long straight wire. The RHS of the above equation is then `-u_0 i` by Ampere's law. We see that `U(vec(r_2)) ≠ U(vec(r_1))` even when `vec r_2 =vec r_1` .Can we have a magnetic scalar potential in this case?
Which of the following four graphs may best represent the current-deflection relation in a tangent galvanometer?
Consider the situation of the previous problem. The directions of the magnetic field due to the dipole are opposite at
(a) P1 and P2
(b) Q1 and Q2
(c) P1 and Q1
(d) P2 and Q2
A uniform magnetic field of `0.20 xx 10^-3 "T"` exists in the space. Find the change in the magnetic scalar potential as one moves through 50 cm along the field.
Figure shows some of the equipotential surfaces of the magnetic scalar potential. Find the magnetic field B at a point in the region.
A magnetic dipole of magnetic moment `1.44 "A m"^2`is placed horizontally with the north pole pointing towards north. Find the position of the neutral point if the horizontal component of the earth's magnetic field is 18 μT.
Do permeability and relative permeability have the same dimensions?
A short magnet produces a deflection of 37° in a deflection magnetometer in Tan-A position when placed at a separation of 10 cm from the needle. Find the ratio of the magnetic moment of the magnet to the earth's horizontal magnetic field.
A bar magnet makes 40 oscillations per minute in an oscillation magnetometer. An identical magnet is demagnetized completely and is placed over the magnet in the magnetometer. Find the time taken for 40 oscillations by this combination. Neglect any induced magnetism.
Soft iron is used to make the core of the transformer because of its ______.
Which property of soft iron makes it useful for preparing electromagnet?
In a permanent magnet at room temperature ______.
The relation b/w magnetic susceptibility xm and relativ~ permeability µr is
A steel wire of length 1 has a magnetic moment m it is then bent into a semicircular arc. The new magnetic moment is
Which of the following is most suitable for the core of an electromagnet?
