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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A charge particle is free to move in an electric field. It will travel
|
(a) Always along a line of force |
|
(b) Along a line of force, if its initial velocity is zero |
|
(c) Along a line of force, if it has some initial velocity in the direction of an acute angle with the line of force |
|
(d) None of the above |
A bright star is indicated to have a brightness magnitude of – 5 compared to a star of brightness zero magnitude. It means that this star compared to the reference star of zero brightness is
|
(a) 100 times less bright |
(b) 5 times more bright |
|
(c) 5 times less bright |
(d) 100 times more bright |
A constant voltage is applied between the two ends of a metallic wire. If both the length and the radius of the wire are doubled, the rate of heat developed in the wire
|
(a) Will be doubled |
(b) Will be halved |
|
(c) Will remain the same |
(d) Will be quadrupled |
In a circuit 5 percent of total current passes through a galvanometer. If resistance of the galvanometer is G then value of the shunt is
|
(a) 19 G |
(b) 20 G |
(c) |
(d) |
