What is super conductivity? - Vidyadip

Question

What is super conductivity?

✓

Answer

$1.$ The resistivity of a metal decreases as the temperature decreases.
$2.$ In case of some metals and metal alloys, the resistivity suddenly drops to zero at a particular temperature $(T_c),$ this temperature is called critical temperature.
$3.$ Super conductivity is the phenomenon where resistivity of a material becomes zero at particular temperature.
$4.$ For example, mercury loses its resistance completely to zero at $4.2 K.$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following in Detail" from Electric Current Through Conductors→Electric Current Through Conductors — all question types→Physics STD 11 Science question papers→Maharashtra Board STD 11 Science question papers→Maharashtra Board question paper generator→

Similar questions

What is Young’s modulus? Describe an experiment to find out Young’s modulus of material in the form of a long straight wire.

A hose pipe used for gardening is ejecting water horizontally at the rate of 0.5 m/s. Area of the bore of the pipe is 10 cm2. Calculate the force to be applied by the gardener to hold the pipe horizontally stationary.

Describe in detail formation of holes in ii. intrinsic semiconductor.

A fighter plane flying horizontally at a altitude of $1.5 \ km$ with a speed of $720 \ km/h$ passes directly overhead an anti$-$aircraft gun. At what angle from the vertical should the gun be fired for the shell with a muzzle velocity of $600 \ m/s$ to hit the plane? At what minimum altitude should the pilot fly to avoid being hit? $[$Take $g = 10 m /s^2]$

Explain ‘mirage’ as an illustration of refraction.

A both is thrown with a velocity of $40 m/s$ in a direction making an angle of $30^\circ$ with the horizontal. Calculate
$(i)$ Horizontal range
$(ii)$ Maximum height and
$(iii)$ Time taken to reach the maximum height.

Write short note on visible light.

The sound emitted from the siren of an ambulance has frequency of $1500\ Hz$. The speed of sound is $340\ m/s$. Calculate the difference in frequencies heard by a stationary observer if the ambulance initially travels towards and then away from the observer at a speed of $30\ m/s$.

Define time period of a satellite.
Obtain an expression for the period of a satellite in a circular orbit round the Earth. Show that the square of the period of revolution of a satellite is directly proportional to the cube of the orbital radius.

For a particle performing uniform circular motion, derive an expression for angular speed and state its unit.