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.
| 151. |
Which of the following produce a virtual image longer in size than the object ? |
| A. | Concave lens |
| B. | Convex lens |
| C. | Concave mirror |
| D. | (b) and (c) both |
| Answer» E. | |
| 152. |
A red flower Kept in green light will appear |
| A. | Red |
| B. | Green |
| C. | White |
| D. | Black |
| Answer» E. | |
| 153. |
The human eye has a lens which has a |
| A. | Soft portion at its centre |
| B. | Hard surface |
| C. | Varying refractive index |
| D. | Constant refractive index |
| Answer» E. | |
| 154. |
Critical angle is minimum when a light ray passes from |
| A. | Air to glass |
| B. | Glass to air |
| C. | Glass to water |
| D. | Water to glass |
| Answer» C. Glass to water | |
| 155. |
Air bubble in water behaves as a |
| A. | Divergent lens |
| B. | Convergent lens |
| C. | Plane glass |
| D. | None of these |
| Answer» B. Convergent lens | |
| 156. |
A ray of light incident on a plane mirror at angle 0. If the angle between the incident and reflected rays is 80 , what is the value of 0? |
| A. | 40 |
| B. | 50 |
| C. | 45 |
| D. | 55 |
| Answer» B. 50 | |
| 157. |
If a ray of light incident on a plane mirror is such that it makes an angle of 30 with the mirror, then the angle of reflection is |
| A. | 30 |
| B. | 45 |
| C. | 55 |
| D. | 60 |
| Answer» E. | |
| 158. |
A boy is standing in front of a plane mirror at a distance of 3 m from it. What is the distance between the boy and his image? |
| A. | 3 m |
| B. | 6 m |
| C. | 4.5 m |
| D. | None |
| Answer» C. 4.5 m | |
| 159. |
Myopia is due to |
| A. | Shortening of eye ball |
| B. | Irregular changes in the focal length of the eye lens |
| C. | Older age |
| D. | Elongation of eye ball |
| Answer» E. | |
| 160. |
Critical angle of light passing from glass to water is minimum for |
| A. | Red colour |
| B. | Green colour |
| C. | Yellow colour |
| D. | Violet colour |
| Answer» E. | |
| 161. |
A convex lens of glass has power P in air. If it is immersed in water, its power will be |
| A. | More than P |
| B. | less than P |
| C. | P |
| D. | None of these |
| Answer» C. P | |
| 162. |
The nature of image formed by a plane mirror is |
| A. | Virtual and erect |
| B. | Of the same size as the object |
| C. | Laterally inverted |
| D. | All of the above are correct |
| Answer» E. | |
| 163. |
Two plane mirrors are inclined at an angle of 60 to each other. If an object is placed between them, the number of images produced will be |
| A. | 0 |
| B. | 5 |
| C. | 4 |
| D. | 10 |
| Answer» C. 4 | |
| 164. |
A boy stands straight in front of a mirror at distance of 30 cm from it. He sees his erect image whose height is 1/5 of his real height. The mirror he is using is |
| A. | Plane |
| B. | Convex |
| C. | Concave |
| D. | None of these |
| Answer» C. Concave | |
| 165. |
The function of the collimator in a spectrometer is |
| A. | To decrease the intensity of light |
| B. | To increase the intensity of light |
| C. | To obtain a parallel beam of light |
| D. | To obtain larger dispersion |
| Answer» D. To obtain larger dispersion | |
| 166. |
The refractive index of a piece of transparent quartz is the greatest for |
| A. | Red light |
| B. | Yellow light |
| C. | Green light |
| D. | Violet light |
| Answer» E. | |
| 167. |
The nature of sun's spectrum is |
| A. | Continuous spectrum with absorption lines |
| B. | Line emission |
| C. | The spectrum of the helium atom |
| D. | Continuous spectrum |
| Answer» B. Line emission | |
| 168. |
When a mirror is rotated by an angle , the reflected ray will rotated by |
| A. | 0 |
| B. | / 2 |
| C. | |
| D. | 2 |
| Answer» E. | |
| 169. |
A number of images of a candle flame are seen in thick mirror |
| A. | The first image is the brightest |
| B. | The second image is the brightest |
| C. | The last image is the brightest |
| D. | All Images are equally brightest |
| Answer» C. The last image is the brightest | |
| 170. |
Two plane mirrors are inclined at 70 , A ray incident on one mirror at angle 0. After reflection, falls on the second mirror and is reflected from there parallel to the first mirror 0 is. |
| A. | 50 |
| B. | 45 |
| C. | 30 |
| D. | 55 |
| Answer» B. 45 | |
| 171. |
To obtain a sustained interference pattern, we require two sources which emit radiation of |
| A. | The same frequency |
| B. | Nearly the same frequency |
| C. | The same frequency and have a definite phase relationship |
| D. | Different wavelengths |
| Answer» D. Different wavelengths | |
| 172. |
The refractive index of a medium is 3. Which one of the following is correct ? |
| A. | The sine of angle of incidence is 3 times the sine of angle of refraction |
| B. | The angle of incidence is twice the angle of refraction |
| C. | The sine of angle of refraction is 3 times the sine of angle of incidence |
| D. | The angle of refraction is twice the angle of incidence |
| Answer» B. The angle of incidence is twice the angle of refraction | |
| 173. |
In the human eye, the focussing is done by |
| A. | To and fro movement of the eye lens |
| B. | To and fro movement of the retina |
| C. | Change in the convexity of the eye lens |
| D. | Change in the refractive index of the eye fluids |
| Answer» D. Change in the refractive index of the eye fluids | |
| 174. |
A light wave travelling in a transparent homogeneous medium enters another homogeneous transparent medium of higher refractive index. The speed of light in the second medium |
| A. | Is less than that in the first medium |
| B. | Is more than that in the first medium |
| C. | Is the same as that in the first medium |
| D. | May be more or less than that in the first medium depending on the angle of incidence |
| Answer» B. Is more than that in the first medium | |
| 175. |
To which one of the following processes is the term CMYK related ? |
| A. | Railway signaling |
| B. | Navigation |
| C. | Offset printing |
| D. | Electronic voting machine |
| Answer» D. Electronic voting machine | |
| 176. |
A person standing in front of a mirror finds his image thinner but with normal height. |
| A. | Concave and spherical |
| B. | Convex and spherical |
| C. | Convex and cylindrical with axis vertical |
| D. | Convex and cylindrical with axis horizontal |
| Answer» E. | |
| 177. |
Th plane mirrors A and B are placed at a distance 12 cm apart facing towards each other. An object is placed in between them at a distance 8 cm from the mirror A. What will be the distance between them at a distance 8 cm from the mirror A. What will be the distance between the first two images, formed in the mirror B? |
| A. | 4 cm |
| B. | 8 cm |
| C. | 16 cm |
| D. | 20 cm |
| Answer» D. 20 cm | |
| 178. |
Whose experiments proved that the speed of light was always the same? |
| A. | James Clark Maxwell |
| B. | Michelson and Marley |
| C. | Miller and Stanley |
| D. | Werner Heisenberg |
| Answer» C. Miller and Stanley | |
| 179. |
A lens, immersed in a liquid becomes invisible when |
| A. | The focal length of the lens is zero |
| B. | The focal length of the lens is infinite |
| C. | The refractive index of the lens is less than the refractive index of the liquid |
| D. | The refractive index of the lens is equal to the refractive index of the liquid |
| Answer» E. | |
| 180. |
To have larger magnification by a telescope |
| A. | The objective should be of large focal length and the eyepiece should be of small focal length |
| B. | Both the objective and eyepiece should be of small focal length |
| C. | Both the objective and the eyepiece should be large focal length |
| D. | None of the above |
| Answer» B. Both the objective and eyepiece should be of small focal length | |
| 181. |
An explosion takes place on the surface of moon. An astronaut at some distance from the site of explosion will |
| A. | Observe light and hear sound caused by the explosion |
| B. | Observe light but not hear sound caused by the explosion |
| C. | Hear sound but not observe light caused by the explosion |
| D. | Neither hear sound nor observe light caused by the explosion |
| Answer» C. Hear sound but not observe light caused by the explosion | |
| 182. |
When a ray of light emerges from a block of glass, the critical angle is |
| A. | Equal to the angle of reflection |
| B. | The angle between the reflected ray and the normal |
| C. | The angle of incidence for which the refracted ray travels along the glass air boundary |
| D. | The angle of incidence |
| Answer» D. The angle of incidence | |
| 183. |
The magnifying power of a compound microscope is |
| A. | Objective magnification / eye piece magnification |
| B. | Eyepiece magnification X objective magnification |
| C. | Eyepiece magnification / objective magnification |
| D. | Objective magnification + objective and eye-piece of |
| Answer» C. Eyepiece magnification / objective magnification | |
| 184. |
Spherical aberration in a thin lens can be reduced by |
| A. | Using a monochromatic light |
| B. | Using a doublet combination |
| C. | Using a circular annular mark over the lens |
| D. | Increasing the size of the lens |
| Answer» D. Increasing the size of the lens | |
| 185. |
A real image is formed by a convex lens. If we put a concave lens in contact with it, the combination again forms areal image. The hew image |
| A. | Is closer to the lens system |
| B. | Is farther from the lens system |
| C. | Is at the original position |
| D. | None of the above |
| Answer» C. Is at the original position | |
| 186. |
The least distance of distinct vision is 25 cm. The focal length of a convex lens is 5 cm It can act as simple microscope of magnifying power |
| A. | 4 |
| B. | 5 |
| C. | 6 |
| D. | none of these |
| Answer» D. none of these | |
| 187. |
The illumination from the sun is greater at noon than in the evening because |
| A. | The sun is brighter at noon |
| B. | The sun is nearer to the earth at noon |
| C. | The rays of the sun are less oblique at noon that in the morning |
| D. | None of the above |
| Answer» D. None of the above | |
| 188. |
Consider the following natural phenomena |
| A. | 1 and 2 |
| B. | 2, 3 and 4 |
| C. | 1 and 3 |
| D. | 4 only |
| Answer» D. 4 only | |
| 189. |
Wave nature of light follows b ecause |
| A. | Light rays travel in straight line |
| B. | Light exhibits the phenomenon of reflection and refraction |
| C. | Light exhibits the phenomenon of interference |
| D. | Light causes the phenomenon of photoelectric effect |
| Answer» D. Light causes the phenomenon of photoelectric effect | |
| 190. |
Which one of the following reflects back more sunlight as compared to to other three? |
| A. | Sand desert |
| B. | Paddy crop land |
| C. | Land covered with fresh snow |
| D. | Prairie land |
| Answer» D. Prairie land | |
| 191. |
A water tank apperars shallower when it is viewed from top due to |
| A. | Rectilinear propagation of light |
| B. | Reflection |
| C. | Total internal reflection |
| D. | Refraction |
| Answer» E. | |
| 192. |
Optically active substances are those substances which |
| A. | Produce polarized light |
| B. | Rotate the plane of polarization of polarized light |
| C. | Produce double refraction |
| D. | Convert a plane polarized light into circularly polarized light |
| Answer» C. Produce double refraction | |
| 193. |
How for must a girl standing front of a concave spherical mirror of radius 120 cm to see an erect image of her face four times its natural size? |
| A. | 40 cm from the mirror |
| B. | 45 cm from the mirror |
| C. | 50 cm from the mirror |
| D. | 55 cm from the mirror |
| Answer» C. 50 cm from the mirror | |
| 194. |
Laser light is considered to be coherent because it consists of |
| A. | Many wavelengths |
| B. | Uncoordinated wavelengths |
| C. | Coordinated waves of exactly the same wavelength |
| D. | Divergent beams |
| Answer» D. Divergent beams | |
| 195. |
The magnifying power of a telescope can be increased by |
| A. | Reducing the focal length of the eye piece |
| B. | Increasing the diameter of the objective |
| C. | Reducing the focal length of the objective |
| D. | Increasing the diameter of the eyepiece |
| Answer» B. Increasing the diameter of the objective | |
| 196. |
The phenomenon of interference is shown by |
| A. | Longitudinal mechanical waves only |
| B. | Transverse mechanical waves only |
| C. | Non-Mechanical transverse waves only |
| D. | All the above types of wave |
| Answer» E. | |
| 197. |
Different objects at different distances are seen by the eye. The parameter that remains constant is |
| A. | The focal length of the eye lens |
| B. | The object distance from the eye lens |
| C. | The radii of curvature of the eye lens |
| D. | The image distance from the eye lens |
| Answer» E. | |
| 198. |
To observe diffraction, the size of the obstacles |
| A. | Should be of the same order as the wavelength |
| B. | Should be much larger than the wavelength |
| C. | Has no relation to wavelength |
| D. | Should be exactly half the wavelength |
| Answer» B. Should be much larger than the wavelength | |
| 199. |
Plane mirrors A and B are kept at angle 0 with respect to each other. Light falls on A is reflected then falls on B and is reflected. The emergent ray is oppsite to the incident direction. The angle 0 is equal to |
| A. | 30 |
| B. | 45 |
| C. | 60 |
| D. | 90 |
| Answer» E. | |
| 200. |
If the top half of a convex lens is covered with black paper |
| A. | The bottom half of the image will disappear |
| B. | The top half of the image will disappear |
| C. | The magnification will reduced to half |
| D. | The intensity will be reduced to half |
| Answer» E. | |