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प्रश्न
Define the following:
Super conductors
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उत्तर
Substances whose resistance decreases tremendously with decreasing temperature and reaches nearly zero near absolute zero are called superconductors; e.g., lead, tin, etc.
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संबंधित प्रश्न
A Radio Set Draws a Current of 0.36 a for 15 Minutes. Calculate the Amount of Electric Charge that Flows Through the Circuit.
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(a) 0.5 C
(b) 2 C
(c) 5 C
(d) 50 C
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(a) this way they required less current
(b) if one lamp fails the others remain lit
(c) this way they require less power
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(i) A current of 1 ampere passed through a resistance of 300 ohms.
(ii) A current of 2 amperes passed through a resistance of 100 ohms.
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(a) Total energy provided by battery in 10 minutes,
(b) Heat dissipated in the bulb in 10 minutes.
Name any two devices, which are working on the heating effect of the electric current.
