English

Which of the Following Substances is Ductile? - Physics

Advertisements
Advertisements

Question

Which of the following substances is ductile?

Options

  • Glass

  • High carbon steel

  • Steel

  • Copper

MCQ
Advertisements

Solution

Copper

shaalaa.com
  Is there an error in this question or solution?
2014-2015 (October)

APPEARS IN

RELATED QUESTIONS

Give any ‘two’ points of differences between diamagnetic and ferromagnetic substances.


An iron rod of the area of cross-section 0.1m2 is subjected to a magnetizing field of 1000 A/m. Calculate the magnetic permeability of the iron rod. [Magnetic susceptibility of iron = 59.9, magnetic permeability of vacuum = 4π x 10-7 S. I. unit]  


In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?


Out of the two magnetic materials, 'A' has relative permeability slightly greater than unity while 'B' has less than unity. Identify the nature of the materials 'A' and 'B'. Will their susceptibilities be positive or negative?


A meter gauge train is heading north with speed 54 km/hr in earth's magnetic field 3 x 10-4T. The e.m.f. induced across the axle joining the wheels is ..........

(a) 0.45 mV

(b) 4.5 mV

(c) 45 mV

(d) 450 m V


The susceptibility of a magnetic material is 0·9853. Identify the type of magnetic material. Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.


The susceptibility of a magnetic material is − 2.6 × 10−5. Identify the type of magnetic material and state its two properties.


Draw magnetic field line when a (i) diamagnetic, (ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field line due to the substances?


The magnetic susceptibility of platinum is 0.0001. It's relative permeability is: 


Answer the following question.
Write three points of differences between para-, dia- and ferromagnetic materials, giving one example for each. 


Identify the following magnetic materials :

(i) A material having susceptibility (χm) = −0⋅00015.
(ii) A material having susceptibility (χm) = 10−5

Which of the following statements is correct for diamagnetic materials?


What happens to a ferromagnetic material when its temperature increases above curie temperature?


A paramagnetic gas has 2.0 × 1026 atoms/m with atomic magnetic dipole moment of 1.5 × 10−23 A m2 each. The gas is at 27°C.

  1. Find the maximum magnetization intensity of this sample.
  2. If the gas in this problem is kept in a uniform magnetic field of 3 T, is it possible to achieve saturation magnetization? Why?

A rod of magnetic material of cross-section 0.25 cm2 is placed in a magnetizing field of intensity 4000 A/m-1. The magnetic flux passing through the rod is 25 × 10-6 Wb. Find out

(a) relative permeability

(b) magnetic susceptibility and 

(c) magnetisation of the rod.


The susceptibility of a magnetic material is positive and small. The material is ______.


Magnetization of the sample is ______.


Relative permittivity and permeability of a material are  `epsilon_"r"` and `µ_"r"` respectively. Which of the following values of these quantities are allowed for a diamagnetic material?


There are three needles 'N1', 'N2' and 'N3' made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. When a magnet is brought close to them, then it will ____________.


A sphere of gold when brought towards a powerful magnet experiences ____________.


A small quantity of paramagnetic liquid is taken in a watch - glass and kept on two dissimilar magnetic poles. The liquid ____________.


Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?


Why is diamagnetism, in contrast, almost independent of temperature?


Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?


Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a ferromagnet.


A Rowland ring of mean radius 15 cm has 3500 turns of wire wound on a ferromagnetic core of relative permeability 800. What is the magnetic field B in the core for a magnetising current of 1.2 A?


Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond curie temperature, then it will show ______.


The given figure represents a material which is ______.


Assertion: The ferromagnetic substance do not obey Curie’s law.
Reason: At Curie point a ferromagnetic substance start behaving as a paramagnetic substance.


The coercivity of a small magnet where the ferromagnet gets demagnetized is 3 × 103 Am–1. The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets demagnetized when inside the solenoid, is ______.


Assertion: A paramagnetic sample display greater magnetisation (for the same magnetic field) when cooled.
Reason: The magnetisation does not depend on temperature.


The magnetic susceptibility is negative for ______.


A diamagnetic material in a magnetic field moves ______.

Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called ______.


Which magnetic materials have negative susceptibility?

Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure. The force on the charge Q is ______.


For a diamagnetic material


The universal property of all substances is ______.


According to the Atomic theory, on heating a magnet, the thermal energy of the elementary magnet ______


A paramagnetic sample shows a net magnetisation of 8 Am–1 when placed in an external magnetic field of 0.6 T at a temperature of 4 K. When the same sample is placed in an external magnetic field of 0.2 T at a temperature of 16 K, the magnetisation will be ______.


A long solenoid has 1000 turns per metre and carries a current of 1 A. It has a soft iron core of µr = 1000. The core is heated beyond the Curie temperature, Tc.

  1. The H field in the solenoid is (nearly) unchanged but the B field decreases drastically.
  2. The H and B fields in the solenoid are nearly unchanged.
  3. The magnetisation in the core reverses direction.
  4. The magnetisation in the core diminishes by a factor of about 108.

Essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding is due to ______.

  1. electrostatic field lines can end on charges and conductors have free charges.
  2. lines of B can also end but conductors cannot end them.
  3. lines of B cannot end on any material and perfect shielding is not possible.
  4. shells of high permeability materials can be used to divert lines of B from the interior region.

A permanent magnet in the shape of a thin cylinder of length 10 cm has M = 106 A/m. Calculate the magnetisation current IM.


Explain quantitatively the order of magnitude difference between the diamagnetic susceptibility of N2 (~5 × 10–9) (at STP) and Cu (~10–5).


The relative magnetic permeability of a substance X is slightly less than unity and that of substance Y is slightly more than unity, then ______.


What is magnetic hysterisis?


Explain ferromagnetism on the basis of the domain theory.


Explain the origin of paramagnetism on the basis of atomic structure.


Explain the meaning of the following statement:

Curie temperature for soft iron is 770°C.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×