- AWavelength is longer
- BWavelength is shorter
- CAmplitude is less
- DData insufficient
Explanation:
$\text{E}=\frac{\text{hc}}{\lambda}$
$\text{E}\propto\frac{\text{1}}{\lambda}$
Hence, E is less if $\lambda$ is longer.
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When light is refracted from air into glass
|
(a) Its wavelength and frequency both increase |
|
(b) Its wavelength increases but frequency remains unchanged |
|
(c) Its wavelength decreases but frequency remains unchanged |
|
(d) Its wavelength and frequency both decrease |
The curve drawn between velocity and frequency of photon in vacuum will be a
|
(a) Straight line parallel to frequency axis |
|
(b) Straight line parallel to velocity axis |
|
(c) Straight line passing through origin and making an angle of 45o with frequency axis |
|
(d) Hyperbola |
Assertion : Microwave communication is preferred over optical communication.
Reason : Microwaves provide large number of channels and band width compared to optical signals.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
The magnetic susceptibility is negative for
|
(a) Paramagnetic materials |
|
(b) Diamagnetic materials |
|
(c) Ferromagnetic materials |
|
(d) Paramagnetic and ferromagnetic materials |
Two metallic spheres of radii 1 cm and 2 cm are given charges
and 5 ×
respectively. If they are connected by a conducting wire, the final charge on the smaller sphere is
|
(a) 3 |
(b) 1 |
(c) 4 |
(d) 2 |
Assertion : A transistor amplifier in common emitter configuration has a low input impedence.
Reason : The base to emitter region is forward biased.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A nucleus
emits one α and one β particles. The resulting nucleus is
|
(a) |
(b) |
(c) |
(d) |