Advertisements
Advertisements
प्रश्न
A long bar magnet has a pole strength of 10 Am. Find the magnetic field at a point on the axis of the magnet at a distance of 5 cm from the north pole of the magnet.
Advertisements
उत्तर
Given:
Pole strength of the bar magnet, m = 10 Am
Distance of the point from the north pole of the bar magnet, r = 5 cm = 0.05 m
We know,
The magnetic field due to magnetic charge (B) is given by
`B = u_0/(4pi) = m/r^2`
= `(10^-7 xx 10) / (5 xx 10^-2)^2 = (10^-6)/(25 xx 10^-4)`
= `(10^-2)/25 = 4 xx 10^-4 "T"`
APPEARS IN
संबंधित प्रश्न
Deduce the expression for the torque acting on a dipole of dipole moment `vecp` in the presence of a uniform electric field `vecE`
Maximum torque acting on an electric dipole of moment 3×10-29 Cm in a uniform electric field E is 6 × 10-25 Nm. Find E.
An electric dipole of dipole moment `vecP` is placed in a uniform electric field `vecE` with its axis inclined to the field. Write an expression for the torque `vecT` experienced by the dipole in vector form. Show diagrammatically how the dipole should be kept in the electric field so that the torque acting on it is:
- maximum
- Zero
Derive the expression for the torque acting on an electric dipole, when it is held in a uniform electric field. identify the orientation of the dipole in the electric field, in which it attains a stable equilibrium.
If the solenoid is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied, what is the magnitude of torque on the solenoid when its axis makes an angle of 30° with the direction of applied field?
Assertion: The poles of magnet can not be separated by breaking into two pieces.
Reason: The magnetic moment will be reduced to half when a magnet is broken into two equal pieces.
An electric dipole of dipole moment 2 × 10-8 C-m in a uniform electric field experiences a maximum torque of 6 × 10-4 N-m. The magnitude of the electric field is ______.
An electric dipole of length 2 cm is placed at an angle of 30° with an electric field 2 × 105 N/C. If the dipole experiences a torque of 8 × 10-3 Nm, the magnitude of either charge of the dipole is ______.
When an electric dipole is placed in a uniform electric field, what is the net force acting on the dipole?
Derive the magnitude of torque acting on an electric dipole in a uniform electric field. Which of the following correctly represents this torque?
In vector form, how is the torque on an electric dipole in a uniform electric field expressed?
When the dipole moment is parallel to the electric field (θ = 0°), what is the magnitude of torque?
Which equilibrium position of a dipole in a uniform electric field is stable?
What is the potential energy of a dipole in unstable equilibrium in a uniform electric field?
What distinguishes the behavior of a dipole in a non-uniform electric field from its behavior in a uniform field?
What real-world phenomenon demonstrates the behavior of a dipole in a non-uniform electric field?
