Home
Class 12
PHYSICS
A small rod of bismuth is suspended free...

A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation establishes that bismuth is

A

Diamagnetic

B

Paramagnetic

C

Ferromagnetic

D

Ferri-magnetic

Text Solution

AI Generated Solution

The correct Answer is:
To determine the magnetic nature of bismuth based on the observation that a small rod of bismuth suspended freely between the poles of a strong electromagnet arranges itself at right angles to the magnetic field, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Setup**: - A small rod of bismuth is placed between the poles of a strong electromagnet. The magnetic field is directed from the north pole to the south pole of the electromagnet. 2. **Observation of the Rod's Position**: - The rod of bismuth is observed to arrange itself at right angles to the magnetic field. This means that the rod is not aligning with the magnetic field lines but is instead positioned perpendicular to them. 3. **Analyzing Magnetic Properties**: - Materials can be classified based on their magnetic susceptibility (Xm): - **Paramagnetic materials**: Have a positive susceptibility (Xm > 0) and are attracted to magnetic fields. - **Ferromagnetic materials**: Also have a positive susceptibility and show strong attraction to magnetic fields. - **Diamagnetic materials**: Have a negative susceptibility (Xm < 0) and are weakly repelled by magnetic fields. 4. **Conclusion Based on Observation**: - Since the bismuth rod is positioned at right angles to the magnetic field, it indicates that it is not being attracted to the magnetic field. Instead, it is being repelled. - This behavior is characteristic of diamagnetic materials, which exhibit a negative magnetic susceptibility. 5. **Final Answer**: - Therefore, the observation establishes that bismuth is a **diamagnetic material**.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • MAGNETISM AND MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section- C Linked Comprehension Type Questions|3 Videos

  • MAGNETISM AND MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section D (Assertion- Reason Type Questions)|8 Videos

  • MAGNETISM AND MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment Section - A Objective Type Questions (One option is correct)|58 Videos

  • LAWS OF MOTION

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION-D) (Assertion-Reason Type Questions)|15 Videos

  • MECHANICAL PROPERTIES OF FLUIDS

    AAKASH INSTITUTE ENGLISH|Exercise SECTION - J|9 Videos

Similar Questions

Explore conceptually related problems

A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The cross-sectional area of the coil is equal to S = 3.0 mm^2 , the number of turns is N = 60 . When the coil turns through 180^@ about its diameter, a galvanometer connected to the coil indicates a charge q = 4.5muC flowing through it. Find the magnetic induction magnitude between the poles, provided the total resistance of the electric circuit equals R = 40 Omega .

A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnetic is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains horizontal potential energy. the work required to do this comes from

Assertion: A thin aluminium disc, spinning freely about a centre pivot, is quickly brought to rest when . placed between the poles of a strong U-shaped magnet Reason:A current induced in a disc rotating in a magnetic field produces a force which tends to oppose the disc's motion.

A moving coil galvanometer has a 50-turn coil of size 2cm xx 2cm . It is suspended between the magnetic poles producing a magnetic field of 0.5 T . Find the torque on the coil due to the magnetic field when a current of 20mA passes through it.

Mercury flows at a speed of 20 cm/s in a pipe with conducting walls of 5 cm diameter. The pipe is in the gap between the pole pieces of an electromagnet, the magnetic field in the gap having induction of 0.6 T. Will the magnetic field affect the hydraulic friction coefficient? The conductivity of mercury is 10^(6)ohm^(-1).m^(-1) .

A rectangular loop of sides 10 cm and 5 cm with a cut is stationary between the pole pieces of an electromagnet. The magnetic field of the magnet is normal to the loop. The current feeding the electromagnet is reduced, so that the field decreased from its initial value of 0.2 T at the rate of 0.02Omega . If the cut is joined and the loop has a resistance of 2.0Omega , then the power dissipated by the loop as heat is

If a magnet is suspended an angle 30^(@) to the magnetic field at any point on eath. Near the north pole.

Assertion (A): If one arm of a U- tube containing a diamagnetic solution is placed in between the poles of a strong magnet with the level in line with the field, the level of the solution falls, Reason (R ): Diamagnetic substances do not aligned with the field

A small coil C with N=200 turns is mounted on one end of a balance beam and introduced between the poles of an electromagnetic as shown in Fig. The area of the coils is S=1cm^2 , the length of the right arm of the balance beam is l=30cm. When there is no current in the coil the balance is in equilibrium. On passing is a currentI=22mA through the coil, equilibrium is restored by putting an additional weight of mass m=60mg on the balance pan. Find the magnetic induction field (in terms of x 10^-1T ) between the poles of the electromagnetic assuming it to be uniform.

It is desired to measure the magnitude of field between the poles of a powerful loud speaker magnet. A small flat search coil of area 2 cm^(2) with 25 closely wound turns is positioned normal to the field direction and then quickly snatched out of the field region (Equivalently, one can give it a quick 90^(@) turn to bring its plane parallel to the field direction). The total charge flowing in the coil (mesured by a ballistic galbanometer connected to the coil) is 7.5 mC. The resistance of the coil and galvanometer is 0.5 Omega . Estimate the field strength of the magnet.

Home
Profile