- ABoth a and b are independent of the material.
- Ba is independent but b depends on the material.
- Cb is independent but a depends on the material.
- DBoth a and b depend on the material.
Explanation:
Moseley's Law for characteristic X-ray is $\sqrt{\text{v}}=\text{a}(\text{z}-\text{b})$where, a and b are constants independent of the material used.
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The variation of magnetic susceptibility (x) with temperature for a diamagnetic substance is best represented by
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(a)
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(b)
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(c)
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(d)
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An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from room temperature 20℃ ? The temperature of boiling water is 100℃
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(a) 6.4 minutes |
(b) 6.3 minutes |
(c) 12.6 minutes |
(d) 12.8 minutes |
Critical angle of light passing from glass to air is minimum for
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(a) Red |
(b) Green |
(c) Yellow |
(d) Violet |
A light bulb is placed between two plane mirrors inclined at an angle of 60°. The number of images formed are
| (a) 6 | (b) 2 | (c) 5 | (d) 4 |
An equiconvex lens is cut into two halves along (i) XOX¢ and (ii) YOY¢ as shown in the figure. Let f, f ¢, f ¢¢ be the focal lengths of the complete lens, of each half in case (i), and of each half in case (ii), respectively
Choose the correct statement from the following
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(a) |
(b) |
(c) |
(d) |