The power of the lens.
Explanation:
For a simple microscope in normal adjustment, the object is placed at a distance equal to f (the focal length) from the lens, And the angular magnification is given by the relation
$\text{m}=\frac{\text{D}}{\text{f}}$
for $\text{u}<\text{f},\text{m}=\frac{\text{D}}{\text{f}}+1$
power of lens
$=\frac{1}{\text{f}}$Angular magnification depends on power.
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In a YDSE bi-chromatic light of wavelengths 400 nm and 560 nm are used. The distance between the slits is 0.1 mm and the distance between the plane of the slits and the screen is 1m. The minimum distance between two successive regions of complete darkness is
|
(a) 4 mm |
(b) 5.6 mm |
(c) 14 mm |
(d) 28 mm |
For an isotropic medium B, m, H and M are related as (where B, 
and M have their usual meaning in the context of magnetic material
|
(a) (B – M) = |
(b) |
(c) |
(d) |
The modulation index of an FM carrier having a carrier swing of 200 kHz and a modulating signal 10 kHz is
|
(a) 5 |
(b) 10 |
(c) 20 |
(d) 25 |
When current in a coil changes to 2 ampere from 8 ampere in 3 
, the e.m.f. induced in the coil is 2 volt. The self inductance of the coil in millihenry is
|
(a) 1 |
(b) 5 |
(c) 20 |
(d) 10 |
An air bubble in sphere having 4 cm diameter appears 1 cm from surface nearest to eye when looked along diameter. If amg = 1.5, the distance of bubble from refracting surface is
|
(a) 1.2 cm |
(b) 3.2 cm |
(c) 2.8 cm |
(d) 1.6 cm |
The velocity factor of a transmission line x. If dielectric constant of the medium is 2.6, the value of x is
|
(a) 0.26 |
(b) 0.62 |
(c) 2.6 |
(d) 6.2 |
