Advertisements
Advertisements
प्रश्न
Write a short note on superconductors?
Advertisements
उत्तर
- The resistance of certain materials becomes zero below a certain temperature, known as critical or transition temperature.
- The materials that exhibit this property are known as superconductors and the phenomenon is known as superconductivity.
APPEARS IN
संबंधित प्रश्न
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
The resistors R1, R2, R3 and R4 in the figure given below are all equal in value.
What would you expect the voltmeter A, B and C to read assuming that the connecting wires in the circuit have negligible resistance?
Four resistances of 16 ohms each are connected in parallel. Four such combinations are connected in series. What is the total resistance?
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of 1 A.
The resistivity of copper = 1.7 × 10–8 Ω m
Fig. represents the circuit used for the verification of ohm's law. Label the different parts from A and F. State the function of each.

Define the following:
Coulomb
What are ohmic conductors? Give one exmaple. Draw a graph showing the current-voltage relationship for an ohmic conductor.
An electronics hobbyist is building a radio which requires 150 Ω in her circuit, but she has only 220 Ω, 79 Ω, and 92 Ω resistors available. How can she connect the available resistors to get the desired value of resistance?
The heat produced by a 100 w heater in 2 minute is equal to
What is meant by resistance of a conductor ? Define its SI unit.
