Superconductors are substances which
A). conduct electricity at low temperature
B). offer high resistance to the flow of current
C). offer no resistance to the flow of electricity
D). conduct electricity at high temperatures
offer no resistance to the flow of electricity
By definition, superconductors are substances which display zero electrical resistance when a current is supplied, and are able to propagate such a current in a circuit indefinitely.
1. Instrument used for measuring specific gravity is called _____.
2. Heat from the sun reaches earth by the process of
3. Among the following materials sound travels fastest in
4. A soap bubble shows colours when illuminated with white light. This is due to
5. What is the reason for formation of Mirage in desert?
7. The value of g on the Earth's surface?changes due to
8. A man cannot see clearly beyond 10 meters. The disease he suffers from :