MCQOPTIONS
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MCQOPTIONS
This section includes 216 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Two sources of light are said to be coherent if the waves prouced by them have the same |
| A. | Wavelength |
| B. | Amplitude |
| C. | Wavelength and amplitude |
| D. | Wavelength and a constant phase difference |
| Answer» E. | |
| 202. |
Luminous intensity of a source is defined as |
| A. | Light energy emitted by the same source per unit time |
| B. | Light energy emitted by the source per unit time per unit area |
| C. | Light energy emitted by the source per unit time per unit solid angle |
| D. | None of the above |
| Answer» D. None of the above | |
| 203. |
Suppose a rocket ship is receding from the earth at a speed of 2 / 10 th the velocity of light. A light in the rocket ship appears blue to the passengers on the ship. What colour would it appear to an observer on the earth ? |
| A. | Blue |
| B. | Orange |
| C. | Yellow |
| D. | Yellow-orange |
| Answer» B. Orange | |
| 204. |
An object is placed between two |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | Infinite |
| Answer» E. | |
| 205. |
The angle of elevation of a cloud is |
| A. | 330 m |
| B. | 660 m |
| C. | 660 3 m |
| D. | 1320 m |
| Answer» C. 660 3 m | |
| 206. |
Total internal reflection of light |
| A. | Air to glass |
| B. | Vacuum to air |
| C. | Air to water |
| D. | Water to air |
| Answer» E. | |
| 207. |
In a cinema hall, the distance between the projector and the screen is increased by 2% Then the intensity of illumination of the screen is |
| A. | Decreased by 2% |
| B. | Decreased by 4% |
| C. | Increased by 2% |
| D. | Increased by 4% |
| Answer» C. Increased by 2% | |
| 208. |
An object is kept 5 cm in front of a concave mirror of focal length 15 cm. What will be nature of the image? |
| A. | Virtual, not magnified |
| B. | Virtual, magnified |
| C. | Real not magnified |
| D. | Real, magnified |
| Answer» C. Real not magnified | |
| 209. |
An endoscope is employed to view the internal parts of the body organ. It is based on the principle of |
| A. | Reflection |
| B. | Internal reflection |
| C. | Refraction |
| D. | Dispersion |
| Answer» C. Refraction | |
| 210. |
The plane surface of plano-convex lens of focal lengh f is silvered. It will behave as a |
| A. | Plane mirror |
| B. | Convex mirror of focal length 2 f |
| C. | Concave mirror of focal lengh f / 2 |
| D. | None of the above |
| Answer» D. None of the above | |
| 211. |
An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm the image produced is |
| A. | Virtual and inverted |
| B. | Real and erect |
| C. | Real, inverted and diminished |
| D. | Real, inverted and of the same size as the object |
| Answer» E. | |
| 212. |
In a compound microscope, the intermediate image is |
| A. | Virtual, erect and magnified |
| B. | Real, erect and magnified |
| C. | Real, inverted and magnified |
| D. | Virtual, erect and reduced |
| Answer» D. Virtual, erect and reduced | |
| 213. |
Optical fibres are based on |
| A. | Scattering |
| B. | Refraction |
| C. | Total internal reflection |
| D. | All of these |
| Answer» D. All of these | |
| 214. |
The phenomenon of splitting white light into seven colours is called |
| A. | Reflection |
| B. | Refraction |
| C. | Refractive index |
| D. | Dispersion |
| Answer» E. | |
| 215. |
A compound microscope has a magnification of 30. The focal length of eye piece is 5 cm. If the final image is formed at the least distance of distinct vision (25 cm) the magnification produced by the objective is |
| A. | 5 |
| B. | 7.5 |
| C. | 10 |
| D. | None of these |
| Answer» B. 7.5 | |
| 216. |
In a compound microscope cross wires are fixed at the point |
| A. | Where the image is formed by the objective |
| B. | Where the image is formed by the eye piece |
| C. | Where the focal point of the objective lies |
| D. | Where the focal point of the eye piece lies |
| Answer» B. Where the image is formed by the eye piece | |