MCQ
In order to increase the angular magnification of a simple microscope, one should increase:
  • A
    The object size
  • B
    The aperture of the lens
  • C
    The focal length of the lens
  • The power of the lens

Answer

Correct option: D.
The power of the lens

When the image is formed at infinity
$m = Df = DPm = Df = DP$
when the image is formed at the near point
$m = (1+Df) = 1 + DP$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

What is the coefficient of mutual inductance when the magnetic flux changes by $2 \times {10^{ - 2}}\,Wb$ and change in current is $0.01\,A$......$henry$
A student is jogging on a straight path with the speed $5.4 \,km$ per hour. Perpendicular to the path is kept a pipe with its opening $8 \,m$ from the road (see figure). Diameter of the pipe is $0.45 \,m$. At the other end of the pipe is a speaker emitting sound of $1280 \,Hz$ towards the opening of the pipes. As the student passes in front of the pipe, she hears the speaker sound for $T$ seconds. $T$ is in the range (Take, speed of sound $=320 \,m / s$ )
A parallel plate air capacitor has a capacitance $C$. When it is half filled with a dielectric of dielectric constant $5$, the percentage increase in the capacitance will be.....$\%$
A motor starter
Which of the following is not a mode of radioactive decay
An equilateral triangular loop $ADC$ of some finite magnetic field $B$ as shown in the figure.At time $t= 0$, side $DC$ of loop is at edge of the magnetic field. Magnetic field is perpendicular to the paper inwards (or perpendicular to the plane of the coil). The induced current versus time graph will be as
A magnet is placed horizontally on ground with its north pole towards the geographic north pole of the earth. The neutral point is obtained
A current $I$ is passing through a wire having two sections $P$ and $Q$ of uniform diameters $d$ and $d/2$ respectively. If the mean drift velocity of electrons in sections $P$ and $Q$ is denoted by $v_P$ and $v_Q$ respectively, then
A particle $A$ of mass $m$ and initial velocity $v$ collides with a particle $B$ of mass $\frac{m}{2}$ which is at rest. The collision is head on, and elastic. The ratio of the de-Broglie wavelengths $\lambda_A$ and $\lambda_B$ after the collision is
The wavelength $K_a \ X-$rays produced by an $X-$ray tube is $0.76 \mathring A .$ The atomic number of anticathode material is