- AVm.
- BV/m.
- CV.
- DNone.
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Susceptibility of ferromagnetic substance is
|
(a) > 1 |
(b) < 1 |
(c) 0 |
(d) 1 |
In producing a pure spectrum, the incident light is passed through a narrow slit placed in the focal plane of an achromatic lens because a narrow slit:
Young's experiment is performed in air and then performed in water, the fringe width
|
(a) Will remain same |
(b) Will decrease |
(c) Will increase |
(d) Will be infinite |
The correct curve between the stopping potential (V) and intensity of incident light (I) is
|
(a)
|
(b)
|
(c)
|
(d)
|
Consider the points lying on a straight line joining two fixed opposite charges. Between the charges there is
|
(a) No point where electric field is zero |
|
(b) Only one point where potential is zero |
|
(c) Only one point where electric field is zero |
|
(d) a, b |
When a white light passes through a hollow prism, then
|
(a) There is no dispersion and no deviation |
(b) Dispersion but no deviation |
|
(c) Deviation but no dispersion |
(d) There is dispersion and deviation both |
On connecting a battery to the two corners of a diagonal of a square conductor frame of side a the magnitude of the magnetic field at the centre will be
|
(a) Zero |
(b) |
(c) |
(d) |
The energy of an X- ray photon of wavelength 1.65 Å is (h = 6.6
, 1eV = 1.6 ![]()
|
(a) 3.5 keV |
(b) 5.5 keV |
(c) 7.5 keV |
(d) 9.5 keV |
The wavelength of yellow line of sodium is 5896 Å. Its wave number will be
|
(a) 50883 × 1010 per second |
(b) 16961 per cm |
|
(c) 17581 per cm |
(d) 50883 per cm |
If the amplification factor of a triode (m) is 22 and its plate resistance is 6600 ohm, then the mutual conductance of this valve is mho is
|
(a) |
(b) 25 |
(c) |
(d) |