Riya Andrews

2022-10-09

The resistivity of certain metals becomes zero at

Select one:

a. Very low temperatures

b.Very high temperatures

c. Room temperatures

d. 0

Select one:

a. Very low temperatures

b.Very high temperatures

c. Room temperatures

d. 0

Tanya Anthony

Beginner2022-10-10Added 5 answers

Step 1

Introduction:

The resistivity of a material is a measure of the resistance of a particular dimension of a specific material to electrical conduction.

Absolute zero temperature does not exist.

Step 2

Hence, when the temperature is brought very low and close to 0 [K], the resistivity of some materials becomes zero and they conduct completely and are called as superconductors.

In superconductors the the resistance drops to zero when the material is cooled below its certain critical temperature.

For example, Mercury at a critical temperature of 4.2 [K], becomes a superconductor.

Hence answer is Option a. Very low temperatures.

Introduction:

The resistivity of a material is a measure of the resistance of a particular dimension of a specific material to electrical conduction.

Absolute zero temperature does not exist.

Step 2

Hence, when the temperature is brought very low and close to 0 [K], the resistivity of some materials becomes zero and they conduct completely and are called as superconductors.

In superconductors the the resistance drops to zero when the material is cooled below its certain critical temperature.

For example, Mercury at a critical temperature of 4.2 [K], becomes a superconductor.

Hence answer is Option a. Very low temperatures.

Materials which do not allow electric current to flow through them is known as

What do you mean by power rating of an electrical appliance? How to use it to calculate (a) the resistance of the appliance, and (b) the safe limit of current in it, while in use?

What is the difference between charge and energy? Are they interrelated

If a light burns out in a parallel circuit, what happens to other lights that may be connected and why?

The device which is used to measure electric current through a circuit is called a/an ____.

Ammeter

Voltmeter

Ohmmeter

WattmeterDoes higher Ohms mean more Resistance?

What factors does the resistance of a conductor depend on?

Define one coulomb charge.

State Ohm's law. Draw a labelled circuit diagram to verify this law in the laboratory. Draw a V-I graph for the same and explain how would you use this graph to determine the resistance of the conductor.

The rate of flow of charges is known as

1) Electric potential

2) Electric conductance

3) Electric current

4) None of these.If the distance between two charges is doubled, what will happen the force between the charges?

Give $3$ differences between ohmic and non-ohmic conductors.

A thick wire has smaller resistance while a thin wire has larger resistance. True or False

Which metals is the best conductors of electricity?

A)Nickel;

B)Silver;

C)Gold;

D)SodiumHow to find the exact value of $\mathrm{csc}\left(\frac{5\pi}{6}\right)$ using the half angle formula?