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.
| 101. |
Light waves projected on oil show colours due to |
| A. | Polarization |
| B. | Diffraction |
| C. | Refraction |
| D. | Interference |
| Answer» E. | |
| 102. |
The primary colours in photography |
| A. | Red, blue yellow |
| B. | Red, yellow, green |
| C. | Red, blue, green |
| D. | Red, green, cyan |
| Answer» D. Red, green, cyan | |
| 103. |
A part of the eye which helps in changing the focal length of crystalline lens is |
| A. | Iris |
| B. | Aqueous huomour |
| C. | Cornea |
| D. | Ciliary muscles |
| Answer» E. | |
| 104. |
The unit of luminous efficiency of an electric bulb is |
| A. | Watt |
| B. | Lumen |
| C. | Lux |
| D. | Lumen / watt |
| Answer» E. | |
| 105. |
How many image will be formed if two mirrors are fitted adjacent walls and one mirror on ceiling? |
| A. | 5 |
| B. | 7 |
| C. | 11 |
| D. | 2 |
| Answer» C. 11 | |
| 106. |
The chemical part of the dye that absorbs light and produces colour is called |
| A. | Neon |
| B. | A chromophore |
| C. | A photochrome |
| D. | A pigment |
| Answer» E. | |
| 107. |
To an observer on the lunar surface, during the day time the sky will appear to by |
| A. | Light yellow |
| B. | Orange |
| C. | Blue |
| D. | Black |
| Answer» E. | |
| 108. |
A laser beam is always |
| A. | A convergent beam |
| B. | A divergent beam |
| C. | A parallel beam |
| D. | Divergent to start with and parallel later on |
| Answer» D. Divergent to start with and parallel later on | |
| 109. |
When seen in green light, the saffron and green portions of our national flag will appear as |
| A. | Black |
| B. | Black and green respectively |
| C. | Green |
| D. | Green and yellow respectively |
| Answer» C. Green | |
| 110. |
The image of our face in a plane mirror is |
| A. | Real |
| B. | Magnified |
| C. | Diminished |
| D. | None of these |
| Answer» E. | |
| 111. |
The path of a refracted ray of light in a prism is parallel to the base of the prism only when the |
| A. | Light of a particular wavelength |
| B. | Ray is incident normally at one face |
| C. | Ray under goes minimum deviation |
| D. | None of the above |
| Answer» D. None of the above | |
| 112. |
Mirage is observed in a desert due to the phenomenon of |
| A. | Interference |
| B. | Total reflection |
| C. | Scattering |
| D. | Double refraction |
| Answer» C. Scattering | |
| 113. |
The amount of light reflected depends upon |
| A. | The nature of material of the object |
| B. | The nature of the surface |
| C. | The smoothness of the surface |
| D. | All of the above are correct |
| Answer» E. | |
| 114. |
An observer moves towards a plane mirror with a speed of 2 m/s. The speed of the image with respect to the observer is |
| A. | 1 m / s |
| B. | 2 m / s |
| C. | 4 m / s |
| D. | 8 m / s |
| Answer» D. 8 m / s | |
| 115. |
A plane mirror reflects a beam of light to form a real image. The incident beam is |
| A. | Parallel |
| B. | Convergent |
| C. | Divergent |
| D. | Any one of these |
| Answer» C. Divergent | |
| 116. |
A man of height 1.4 m wishes to see his full image in a plane mirror placed at distance of 2 m. The minimum height of the mirror should be |
| A. | 0.5 m |
| B. | 0.7 m |
| C. | 0.9 m |
| D. | None |
| Answer» C. 0.9 m | |
| 117. |
A toy is placed between two plane mirrors inclined at angle of 60 . The number of images formed is |
| A. | 5 |
| B. | 6 |
| C. | 4 |
| D. | 3 |
| Answer» B. 6 | |
| 118. |
The focal length of a plane mirror is |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Infinite |
| Answer» E. | |
| 119. |
The wavelength of visible light are between |
| A. | 300 m to 0.4 m |
| B. | 0.4 m to 0.7 m |
| C. | 0.7 m to 1000 m |
| D. | 0.1 cm to 30 cm |
| Answer» C. 0.7 m to 1000 m | |
| 120. |
The power of lens is -2D What is its focal length? |
| A. | 2 m |
| B. | 1.5 m |
| C. | 1.0 m |
| D. | 0.5 m |
| Answer» E. | |
| 121. |
Candela is unit of |
| A. | Acoustic intensity |
| B. | Electric intensity |
| C. | Magnetic intensity |
| D. | Luminous intensity |
| Answer» E. | |
| 122. |
If the angle between two plane mirrors is 60 then the number of image formed will be |
| A. | Infinite |
| B. | 7 |
| C. | 6 |
| D. | 5 |
| Answer» E. | |
| 123. |
Longitudinal waves do not exhibit |
| A. | Refraction |
| B. | Reflection |
| C. | Diffraction |
| D. | Polarization |
| Answer» E. | |
| 124. |
An equiconvex lens is prepared from a glass of refractive index 1.5 The radius of curvature of the surface is 0.5 m. The focal length of the lens is |
| A. | 0.5 m |
| B. | 1.0 m |
| C. | 1.5 m |
| D. | 2.0 m |
| Answer» B. 1.0 m | |
| 125. |
Which one of the following phenomena is used in optical fibres? |
| A. | Scattering |
| B. | Successive reflections |
| C. | Refraction |
| D. | Total internal reflection |
| Answer» E. | |
| 126. |
Panchromatic photographic film is sensitive to |
| A. | Light of red colour |
| B. | Light of yellow colour |
| C. | Light of violet colour |
| D. | The entire region of the visible spectrum |
| Answer» E. | |
| 127. |
Velocity of light is maximum in |
| A. | Diamond |
| B. | Water |
| C. | Glass |
| D. | Vacuum |
| Answer» E. | |
| 128. |
In vacuum the speed of light depends upon |
| A. | Frequency |
| B. | Wavelength |
| C. | Velocity of the source of light |
| D. | None of the above |
| Answer» E. | |
| 129. |
A ray of light travelling obliquely from denser to rarer medium |
| A. | Bends towards the normal |
| B. | Bends away from the normal |
| C. | Does not deviate from its path |
| D. | None of the above |
| Answer» C. Does not deviate from its path | |
| 130. |
A convex lens is immersed in a liquid of refractive index greater than that of glass. It will behave as a |
| A. | Convergent lens |
| B. | Divergent lens |
| C. | Plane glass |
| D. | None of these |
| Answer» C. Plane glass | |
| 131. |
The power of lens is 4 diopters at focal length is |
| A. | 20 cm |
| B. | 25 cm |
| C. | 50 cm |
| D. | 400 cm |
| Answer» C. 50 cm | |
| 132. |
If there were no atmosphere, the length of the day on the earth will |
| A. | Decrease |
| B. | Increase |
| C. | Remain the same |
| D. | None of these |
| Answer» B. Increase | |
| 133. |
According to the modern theory for nature of light, the light has |
| A. | Wave nature only |
| B. | Particle nature only |
| C. | Both wave and particle (dual) nature |
| D. | Neither particle nature nor wave nature |
| Answer» D. Neither particle nature nor wave nature | |
| 134. |
The refractive index of a given piece of transparent quartz is greatest for |
| A. | Red light |
| B. | Violet light |
| C. | Green light |
| D. | Yellow light |
| Answer» C. Green light | |
| 135. |
When light passes from one medium to another, the physical quantity that remains unchanged is |
| A. | Velocity |
| B. | Wavelength |
| C. | Frequency |
| D. | None of these |
| Answer» D. None of these | |
| 136. |
A virtual image larger than the object can be formed by a |
| A. | Concave mirror |
| B. | Convex mirror |
| C. | Convex lens |
| D. | Concave lens |
| Answer» B. Convex mirror | |
| 137. |
The magnifying power of a compound microscope increases when |
| A. | The focal length of objective lens is increased and that of eye lens is decreased |
| B. | The focal length of eye lens is increased and that of objective lens is decreased |
| C. | Focal lengths of both objective and eye piece are increased |
| D. | Focal lengths of both objective and eye piece are decreased. |
| Answer» E. | |
| 138. |
An object is placed 10 cm in front of a convex mirror of focal length 20 cm. The distance of the image from the mirror is |
| A. | 10 / 3 cm |
| B. | 20 / 3 cm |
| C. | 10 cm |
| D. | 40 / 3 cm |
| Answer» C. 10 cm | |
| 139. |
Which of the following form (s) a virtual and erect image for all position of the object? |
| A. | Convex lens |
| B. | Concave lens |
| C. | Convex mirror |
| D. | Both (b) and (c) |
| Answer» E. | |
| 140. |
Line spectrum contains information about |
| A. | The atoms of the prism |
| B. | The atoms of the source |
| C. | The molecules of the source |
| D. | None of the above |
| Answer» C. The molecules of the source | |
| 141. |
When viewed in white light, soap bubbles show colours because of |
| A. | Interference |
| B. | Scattering |
| C. | Diffraction |
| D. | Dispersion |
| Answer» B. Scattering | |
| 142. |
Young's experiment established that |
| A. | Light consists of waves |
| B. | Light consists of particle |
| C. | Light is neither particle nor wave |
| D. | Light is both particle and wave |
| Answer» B. Light consists of particle | |
| 143. |
A beam of light travelling at a velocity of V m/s is incident at an angle 45 on a glass. Slab of refractive index 1.5. What is the velocity of the beam of light inside the slab? |
| A. | V |
| B. | 2V / 3 |
| C. | V / 2 |
| D. | None of these |
| Answer» C. V / 2 | |
| 144. |
Angular separation between two colours of the spectrum depends upon |
| A. | Angle of deviation |
| B. | Angle of incidence |
| C. | Size of the prism |
| D. | All of these |
| Answer» B. Angle of incidence | |
| 145. |
A plane glass slab is placed over various coloured letters, The letter which appears least raised is |
| A. | Blue |
| B. | Violet |
| C. | Green |
| D. | Red |
| Answer» E. | |
| 146. |
Which one of light in the atmosphere takes place due to |
| A. | Twinkling of stars |
| B. | Mirage |
| C. | Rainbow |
| D. | Redshift |
| Answer» E. | |
| 147. |
Image formed by a convex spherical mirror is |
| A. | Virtual |
| B. | Real |
| C. | Enlarged |
| D. | Inverted |
| Answer» B. Real | |
| 148. |
Cylindrical lens is used by a person suffering from |
| A. | Astigmatism |
| B. | Myopia |
| C. | Hypermetropia |
| D. | Presbyopia |
| Answer» B. Myopia | |
| 149. |
For an astronaut in a space ship, the sky appears |
| A. | Black |
| B. | White |
| C. | Green |
| D. | Blue |
| Answer» B. White | |
| 150. |
The focal length of a convex lens is 50 cm. Its power is |
| A. | + 50 D |
| B. | - 50 D |
| C. | + 2 D |
| D. | - 2 D |
| Answer» D. - 2 D | |