- AThe frequency of the emitted photon will double.
- ✓Twice as many photons will be released.
- CFour times more photons will be emitted than before.
- DThere is no effect.
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Which of following can not be polarised
|
(a) Radio waves |
(b) Ultraviolet rays |
(c) Infrared rays |
(d) Ultrasonic waves |
A hollow conducting sphere of radius R has a charge (+Q) on its surface. What is the electric potential within the sphere at a distance r =
from its centre
|
(a) Zero |
(b) |
(c) |
(d) |
If all the resistors shown have the value 2 ohm each, the equivalent resistance over AB is
|
(a) 2 ohm |
(b) 4 ohm |
(c) 1 |
(d) 2 |
The working of dynamo is based on principle of
|
(a) Electromagnetic induction |
(b) Conversion of energy into electricity |
|
(c) Magnetic effects of current |
(d) Heating effects of current |
Biaxial crystal among the following is
|
(a) Calcite |
(b) Quartz |
(c) Selenite |
(d) Tourmaline |
Which of the following phenomena can explain quantum nature of light
|
(a) Photoelectric effect |
(b) Interference |
(c) Diffraction |
(d) Polarisation |