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Superconductors are substances which

conduct electricity at low temperature
offer high resistance to the flow of current
offer no resistance to the flow of electricity
conduct electricity at high temperatures
Additional Questions

Light travels at the fastest speed in

Answer

Railway tracks are banked on curves

Answer

On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because

Answer

Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?

Answer

Intensity of sound at a point is ____ its distance from the source.

Answer

Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open

Answer

Radio telescopes are better than optical telescopes because

Answer

Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit

Answer

Out of the following pairs, which one does not have identical dimension?

Answer

Mercury is commonly used as a thermometric fluid rather than water because

Answer
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