Advertisements
Advertisements
प्रश्न
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.
उत्तर
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
संबंधित प्रश्न
State two advantages of an electromagnet over a permanent magnet.
What are permanent magnets? Give one example ?
Write two characteristics of a material used for making permanent magnets ?
Why should the material used for making permanent magnets have high coercivity?
Compare the direction of the magnetic field inside a solenoid with that of the field there if the solenoid is replaced by its equivalent combination of north pole and south pole.
The force on a north pole, `vecF = mvecB` , parallel to the field `vecB` . Does it contradict our earlier knowledge that a magnetic field can exert forces only perpendicular to itself?
Magnetic meridian is
A dip circle is taken to geomagnetic equator. The needle is allowed to move in a vertical plane perpendicular to the magnetic meridian. The needle will stay ______.
Which of the following four graphs may best represent the current-deflection relation in a tangent galvanometer?
A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying as electric current i. The magnetic field due to the magnet at a point on the periphery of the wire is B. The radius of the loop is a. The force on the wire is
To measure the magnetic moment of a bar magnet, one may use
(a) a tangent galvanometer
(b) a deflection galvanometer if the earth's horizontal field is known
(c) an oscillation magnetometer if the earth's horizontal field is known
(d) both deflection and oscillation magnetometer if the earth's horizontal field is not known
Two long bare magnets are placed with their axes coinciding in such a way that the north pole of the first magnet is 2.0 cm from the south pole of the second. If both the magnets have a pole strength of 10 Am, find the force exerted by one magnet of the other.
Do permeability and relative permeability have the same dimensions?
If the earth's magnetic field has a magnitude 3.4 × 10−5 T at the magnetic equator of the earth, what would be its value at the earth's geomagnetic poles?
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 thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from ______.
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?
Which magnetic properties are desirable for making a permanent magnet?
