The graph between wave number () and angular frequency (w) is
|
(a) |
(b) |
(c) |
(d) |
The graph between wave number () and angular frequency (w) is
|
(a) |
(b) |
(c) |
(d) |
(a)
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For a thermocouple, the neutral temperature is 270℃ and the temperature of its cold junction is 20℃. If there is no deflection in the galvanometer, the temperature of the hot junction should be
|
(a) 210 ℃ |
(b) 540 ℃ |
(c) 520 ℃ |
(d) 209 ℃ |
The direction of ray of light incident on a concave mirror is shown by PQ while directions in which the ray would travel after reflection is shown by four rays marked 1, 2, 3 and 4 (Fig). Which of the four rays correctly shows the direction of reflected ray?

If energy of K-shell electron is – 40000 eV and If 60000 V potential is applied at coolidge tube then which of the following X-ray will get form
|
(a) Continuous |
|
(b) White X-rays |
|
(c) Continuous and all series of characteristic |
|
(d) None of these |
Two charges are at a distance ‘d’ apart. If a copper plate (conducting medium) of thickness is placed between them, the effective force will be
|
(a) 2F |
(b) F / 2 |
(c) 0 |
(d) |
An object 5 cm tall is placed 1m from a concave spherical mirror which has a radius of curvature of 20 cm The size of the image is
|
(a) 0.11 cm |
(b) 0.50 cm |
(c) 0.55 cm |
(d) 0.60 cm |