Question
A simple microscope has:
✓
Answer
- 1 convex lens
A simple microscope is made up of a single convex lens fitted in a round metallic frame with a handle.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What is not true of equipotential surface?
A bar magnet has coercivity $4 \times 10^3 Am^{-1}.$ It is desired to demagnetise it by inserting it inside a solenoid $12 \ cm$ long and having $60$ turns. The current that should be sent through the solenoid is
→Let there be a spherically symmetric charge distribution with charge density varying as $\text{p}(\text{r})=\text{p}_0\bigg(\frac{5}{4}-\frac{\text{r}}{\text{R}}\bigg)$ upto r = R and p(r) = 0 for r > R where r is the distance from the origin the electric field at a distance r(r < R) from the origin is given by.
→Two long straight wires are set parallel to each other. Each carries a current $i$ in the same direction and the separation between them is $2r.$ The intensity of the magnetic field midway between them is
→The current in a $LR$ circuit builds up to $\frac{3}{4}^{th}$ in of its steady state value in $4s.$ The time constant of this circuit is
→Which of the following waves are not electromagnetic?
Assertion : The resistance of super-conductor is zero.
Reason : The super-conductors are used for the transmission of electric power.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : The super-conductors are used for the transmission of electric power.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
In a photoelectric experiment the stopping potential for the incident light of wavelength$4000\mathring{\text{A}}$ is 2 volt. If the wavelength be changed to $3000\mathring{\text{A}}$, the stopping potential will be?
→A study of binary stars is most helpful in(a) Finding their distances(b) Finding their temperature(c) Finding their masses(d) Verifying Newton's force law of gravitation
Two coils are at fixed locations. When coil $1$ has no current and the current in coil $2$ increases at the rate of $15.0As^{-1},$ the emf in coil $1$ is $25\ mV.$ When coil $2$ has no current and coil $1$ has a current of $3.6A,$ the flux linkage in coil $2$ is.
→