- Cp - Cv = R
- Cp = Cv
- Cp is slightly greater than Cv
- Cp is slightly less than Cv
Explanation:
For a solid with a small expansion coefficient, work done in a process will also be small. Thus, the specific heat depends slightly on the process. Therefore, Cp is slightly greater than Cv.
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A virtual image three times the size of the object is obtained with a concave mirror of radius of curvature 36 cm. The distance of the object from the mirror is
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(a) 5 cm |
(b) 12 cm |
(c) 10 cm |
(d) 20 cm |
Mosley measured the frequency (f) of the characteristic X-rays from many metals of different atomic number (Z) and represented his results by a relation known as Mosley's law. This law is (a, b are constants)
|
(a) f = a |
(b) Z = |
(c) |
(d) |
If a power of 100 W is being supplied across a potential difference of 200 V, current flowing is
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(a) 2 A |
(b) 0.5 A |
(c) 1 A |
(d) 20 A |
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(a) Increase in length |
(b) Increase in temperature |
|
(c) Decrease in cross–sectional area |
(d) All of these |