For a metallic wire, the ratio V/i (V = the applied potential difference, i = current flowing) is
|
(a) Independent of temperature |
|
(b) Increases as the temperature rises |
|
(c) Decreases as the temperature rises |
|
(d) Increases or decreases as temperature rises, depending upon the metal |
(b) Increases as the temperature rises
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The idea of matter waves was given by
|
(a) Davisson and Germer |
(b) de-Broglie |
(c) Einstein |
(d) Planck |
At a place, the magnitudes of the horizontal component and total intensity of the magnetic field of the earth are 0.3 and 0.6 Oersted respectively. The value of the angle of dip at this place will be
| (a) 60° | (b) 45° | (c) 30° | (d) 0° |
Penetrating power of X-rays depends on
|
(a) Current flowing in the filament |
(b) Applied potential difference |
|
(c) Nature of the target |
(d) All the above |
The condensers of capacity 
and 
are connected in parallel, then the equivalent capacitance is
|
(a) |
(b) |
(c) |
(d) |
