- Acm
- B$cm^{2}$
- ✓$cm^{-1}$
- D$cm^{-2}$
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If the thermionic current density is J and emitter temperature is T then the curve between and
will be
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(a)
|
(b)
|
(c)
|
(d)
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The unit of electric field is not equivalent to
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(a) N/C |
(b) J/C |
(c) V/m |
(d) J/C - m |
In Young's double slit experiment, if one of the slit is closed fully, then in the interference pattern
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(a) A bright slit will be observed, no interference pattern will exist |
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(b) The bright fringes will become more bright |
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(c) The bright fringes will become fainter |
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(d) None of the above |
Particle nature and wave nature of electromagnetic waves and electrons can be shown by
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(a) Electron has small mass, deflected by the metal sheet |
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(b) X-ray is diffracted, reflected by thick metal sheet |
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(c) Light is refracted and defracted |
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(d) Photoelectricity and electron microscopy |
White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains
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(a) Yellow, orange, red |
(b) Violet, indigo, blue |
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(c) All colours |
(d) All colours except green |
The stopping potential (
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(a) Depends upon the angle of incident light |
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(b) Depends upon the intensity of incident light |
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(c) Depends upon the surface nature of the substance |
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(d) Is independent of the intensity of the incident light |