MCQ
In which of the following the final image is erect?
- ASimple microscope
- BCompound microscope
- CAstronomical telescope
- DNone of these
✓
Answer
- Simple microscope
Explanation:
Only in simple microscope the image formed is erect, while it is inverted in compound microscope and astronomical telescope.
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
A parallel plate condenser is filled with two dielectrics as shown. Area of each plate is 
and the separation is t metre . The dielectric constants are 
and 
respectively. Its capacitance in farad will be
|
(a) |
(b) |
(c) |
(d) |
A solid sphere and a hollow sphere of the same material and of equal radii are heated to the same temperature:
→- Both will emit equal amount of radiation per unit time in the biginning.
- Both will absorb equal amount of radiation from the surrounding in the biginning.
- The initial rate of cooling $\Big(\frac{\text{dT}}{\text{dt}}\Big)$ will be the same for the two spheres.
- The two spheres will have equal temperatures at any instant.
The phenomenon utilised in an optical fibre is
|
(a) Refraction |
(b) Interference |
|
(c) Polarization |
(d) Total internal reflection |
A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index m = 1.5) making an incidence angle of 60o on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km
| (a) 3.33 m sec | (b) 6.67 m sec | (c) 5.77 m sec | (d) 3.85 m sec |
The plates of parallel plate capacitor are charged upto 100 V. A 2mm thick plate is inserted between the plates. Then to maintain the same potential difference, the distance between the plates is increased by 1.6 mm. The dielectric constant of the plate is
|
(a) 5 |
(b) 1.25 |
(c) 4 |
(d) 2.5 |
Image formed on the retina is
|
(a) Real and inverted |
(b) Virtual and erect |
|
(c) Real and erect |
(d) Virtual and inverted |
Two heater wires of equal length are first connected in series and then in parallel. The ratio of heat produced in the two cases is
|
(a) 2 : 1 |
(b) 1 : 2 |
(c) 4 : 1 |
(d) 1 : 4 |
The speed at which the current travels in a conductor, is nearly.
Choose the wrong statement of the following:
Silver and copper voltameter are connected in parallel with a battery of e.m.f. 12 V. In 30 minutes, 1 gm of silver and 1.8 gm of copper are liberated. The power supplied by the battery is (
and 
|
(a) 24.13 J/sec |
(b) 2.413 J/sec |
(c) 0.2413 J/sec |
(d) 2413 J/sec |