- ASource of emf.
- BElectric field produced by charges accumulated on the surface of wire.
- CThe charges just behind a given segment of wire which push them just the right way by repulsion.
- DThe charges ahead.
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The Avogadro's number is 6 per gm mole and electronic charge is 1.6
. The Faraday's number is
|
(a) |
(b) |
|
(c) |
(d) |
Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam
|
(a) 75° |
(b) 55° |
(c) 35° |
(d) 15° |
Two identical light sources S1 and S2 emit light of same wavelength l. These light rays will exhibit interference if
|
(a) Their phase differences remain constant |
|
(b) Their phases are distributed randomly |
|
(c) Their light intensities remain constant |
|
(d) Their light intensities change randomly |