Question
A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum p and energy E, then
| (a) p = 0, E = 0 | (b) p ¹ 0, E ¹ 0 | (c) p ¹ 0, E = 0 | (d) p = 0, E ¹ 0 |
A plane electromagnetic wave is incident on a material surface. If the wave delivers momentum p and energy E, then
| (a) p = 0, E = 0 | (b) p ¹ 0, E ¹ 0 | (c) p ¹ 0, E = 0 | (d) p = 0, E ¹ 0 |
(b) p ¹ 0, E ¹ 0
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Davission and Germer experiment proved
|
(a) Wave nature of light |
(b) Particle nature of light |
|
(c) Both (a) and (b) |
(d) Neither (a) nor (b) |
If in the experiment of Wheatstone's bridge, the positions of cells and galvanometer are interchanged, then balance points will
|
(a) Change |
|
(b) Remain unchanged |
|
(c) Depend on the internal resistance of cell and resistance of galvanometer |
|
(d) None of these |
Two electric bulbs (60W and 100W respectively) are connected in series. The current passing through them is
|
(a) More in 100W bulb |
(b) More in 60W bulb |
(c) Same in both |
(d) None of these |
In N-type semiconductors, majority charge carriers are
|
(a) Holes |
(b) Protons |
(c) Neutrons |
(d) Electrons |
A person is in a room whose ceiling and two adjacent walls are mirrors. How many images are formed
| (a) 5 | (b) 6 | (c) 7 | (d) 8 |