- AThyristor
- BNon-ohmic conductors
- COhmic conductors
- DSuperconductors
Explanation:
The conductors which obey Ohm’s law are called Ohmic conductors. The linear relationship between voltage and current for these conductors hold good.
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If resistance of voltmeter is 10000 W and resistance of ammeter is 2 W then find R when voltmeter reads 12V and ammeter reads 0.1 A
|
(a) 118 W |
(b) 120 W |
(c) 124 W |
(d) 114W |
The rays of different colours fail to converge at a point after going through a converging lens. This defect is called:
For the sustained interference of light, the necessary condition is that the two sources should
|
(a) Have constant phase difference |
(b) Be narrow |
|
(c) Be close to each other |
(d) Of same amplitude |



A coil has an inductance of 2.5 H and a resistance of 0.5 r. If the coil is suddenly connected across a 6.0 volt battery, then the time required for the current to rise 0.63 of its final value is
|
(a) 3.5 sec |
(b) 4.0 sec |
(c) 4.5 sec |
(d) 5.0 sec |
If the radioactive decay constant of radium is 1.07
per year, then its half life period is approximately equal to
|
(a) 8,900 years |
(b) 7,000 years |
(c) 6,476 years |
(d) 2,520 years |