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MCQOPTIONS
This section includes 2637 Mcqs, each offering curated multiple-choice questions to sharpen your 7th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1401. |
A parallel beam of rays falling on a concave lens |
| A. | are scattered |
| B. | remain parallel |
| C. | are diverged |
| D. | are converged |
| Answer» D. are converged | |
| 1402. |
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena is/are responsible for this? |
| A. | Diffusion |
| B. | Dispersion and total internal reflection |
| C. | Only refraction |
| D. | Diffusion, refraction and total internal reflection. |
| Answer» C. Only refraction | |
| 1403. |
If a pin is placed in front of, and to the right of a plane mirror as shown in figure, then where is the image of the pin formed? |
| A. | P |
| B. | Q |
| C. | R |
| D. | S |
| Answer» D. S | |
| 1404. |
Which of the following is a natural source of light? |
| A. | Electric lamp |
| B. | Tube light |
| C. | Torch |
| D. | The sun |
| Answer» E. | |
| 1405. |
Dispersion of light is defined as |
| A. | spliting of white light into seven colours |
| B. | spliting of white light into five colours |
| C. | spliting of white light into six colours |
| D. | spliting of white light into any number of colours |
| Answer» B. spliting of white light into five colours | |
| 1406. |
Why are convex mirrors used by drivers as rear view mirrors in vehicles? |
| A. | They reflect light better than othel mirrors. |
| B. | They produce images which are clearer than those produced by others |
| C. | They produce magnified images. |
| D. | They give a wide field of view. |
| Answer» E. | |
| 1407. |
A reflecting surface is curved outwards. Which of the following mirrors is it likely to be? |
| A. | Concave |
| B. | Plane |
| C. | Convex |
| D. | All of the above |
| Answer» D. All of the above | |
| 1408. |
The point where the rays from a point object meet after refraction through a lens is called the |
| A. | focus |
| B. | center of curvature |
| C. | optical centre |
| D. | image point |
| Answer» B. center of curvature | |
| 1409. |
What happens during lateral inversion? |
| A. | The right of the object will be on the right side of the image. |
| B. | The left side of the object will be on the left side of the image. |
| C. | The upper part of the object will be at the bottom of the object. |
| D. | The right side of the object will be on the left side of the image. |
| Answer» E. | |
| 1410. |
An ideal mirror |
| A. | absorbs all the amount of light incident on it |
| B. | refracts all the light |
| C. | reflects all the light |
| D. | none of the above |
| Answer» D. none of the above | |
| 1411. |
Which of the following produces a virtual image for any position of the object? |
| A. | Convex lens |
| B. | Pinhole camera |
| C. | Concave mirror |
| D. | Convex mirror |
| Answer» E. | |
| 1412. |
A ray of light is incident on a plane mirror and the angle of incidence is\[25{}^\circ \]. What is the angle Of reflection? |
| A. | \[0{}^\circ \] |
| B. | \[50{}^\circ \] |
| C. | \[90{}^\circ \] |
| D. | \[25{}^\circ \] |
| Answer» E. | |
| 1413. |
What is a real image? |
| A. | It cannot be captured on a screen. |
| B. | It can be captured on a screen. |
| C. | It can be captured only on a celluloid screen. |
| D. | It is always magnified. |
| Answer» C. It can be captured only on a celluloid screen. | |
| 1414. |
The object or image distance is taken as positive |
| A. | if the length is measured opposite to the direction of the incident ray |
| B. | if the length is measured in the direction of the incident ray |
| C. | if the length is measured opposite to the direction of the refracted ray |
| D. | none of these |
| Answer» C. if the length is measured opposite to the direction of the refracted ray | |
| 1415. |
What is a spherical mirror? |
| A. | A reflecting, elliptical surface |
| B. | A reflecting, spherical surface |
| C. | A reflecting, parabolic surface |
| D. | A flat, reflecting surface |
| Answer» C. A reflecting, parabolic surface | |
| 1416. |
A ray of light is incident on a plane mirror at an angle of incidence of\[30{}^\circ \]. The deviation produced by the mirror is |
| A. | \[30{}^\circ \] |
| B. | \[60{}^\circ \] |
| C. | \[90{}^\circ \] |
| D. | \[120{}^\circ \] |
| Answer» E. | |
| 1417. |
Which of the following can form enlarged, virtual images? |
| A. | Convex mirrors |
| B. | Concave mirrors |
| C. | Plane mirrors |
| D. | Concave lens |
| Answer» C. Plane mirrors | |
| 1418. |
The distance between the focus and the pole of the mirror is called |
| A. | focal length |
| B. | radius of curvature |
| C. | principal axis |
| D. | diameter of curvature |
| Answer» B. radius of curvature | |
| 1419. |
What kind of an image is always produced by a convex mirror? |
| A. | An erect, virtual and diminished image |
| B. | An erect, real and diminished image |
| C. | An erect, real and enlarged image |
| D. | A virtual, erect and enlarged image |
| Answer» B. An erect, real and diminished image | |
| 1420. |
A spherical mirror is a |
| A. | reflecting elliptical surface |
| B. | reflecting spherical surface |
| C. | reflecting parabolic surface |
| D. | flat reflecting surface |
| Answer» C. reflecting parabolic surface | |
| 1421. |
To prevent the mirror from getting scratched, which colour is painted at the back of the mirror? |
| A. | Red |
| B. | Yellow |
| C. | Blue |
| D. | Green |
| Answer» B. Yellow | |
| 1422. |
In order to be used as mirrors, glasses are coated with |
| A. | silver |
| B. | copper |
| C. | aluminium |
| D. | platinum |
| Answer» B. copper | |
| 1423. |
Which of the following are used as reflectors in torchlights? |
| A. | Concave mirrors |
| B. | Plane mirrors |
| C. | Convex mirrors |
| D. | Concave lens |
| Answer» B. Plane mirrors | |
| 1424. |
Normally a plane mirror forms |
| A. | a real image only |
| B. | a virtual image only |
| C. | Both real as well as virtual image |
| D. | Neither real nor virtual image |
| Answer» C. Both real as well as virtual image | |
| 1425. |
Which of the following is used for splitting sunlight into seven colors? |
| A. | A prism |
| B. | A plane mirror |
| C. | A concave mirror |
| D. | A convex lens |
| Answer» B. A plane mirror | |
| 1426. |
The surfaces which cannot produce clear images are called |
| A. | rough surfaces |
| B. | ideal surfaces |
| C. | smooth surfaces |
| D. | curved surfaces |
| Answer» B. ideal surfaces | |
| 1427. |
In the given figure, two mirrors P and Q are situated at an angle of \[{{60}^{o}}\] with each other and a ray of light is incident on mirror P at an angle of \[{{55}^{o}}\]. What is the value of angle A if the ray again reflected by the mirror Q? |
| A. | \[{{35}^{o}}\] |
| B. | \[{{55}^{o}}\] |
| C. | \[{{50}^{o}}\] |
| D. | \[{{70}^{o}}\] |
| Answer» D. \[{{70}^{o}}\] | |
| 1428. |
Which of the following are used in projectors? |
| A. | Concave lens |
| B. | Convex mirrors |
| C. | Plane mirrors |
| D. | Convex lenses |
| Answer» B. Convex mirrors | |
| 1429. |
We can see the objects only when |
| A. | reflected light reaches our eyes |
| B. | the objects absorb all the light |
| C. | the objects allow all the light to pass through them |
| D. | None of the above |
| Answer» B. the objects absorb all the light | |
| 1430. |
In a dark night, you have only one light source in your room. But you have two mirrors, one is concave and another is convex. Which mirror will you use to make the room lighted? |
| A. | Concave mirror, because it converges the beam of light. |
| B. | Concave mirror, because it diverges the beam of light. |
| C. | Convex mirror, because it diverges the beam of light. |
| D. | Either concave or convex depends on the position of source. |
| Answer» E. | |
| 1431. |
If the angle of incidence is \[50{}^\circ \], what is the angle between the incident ray and the reflected ray? |
| A. | \[50{}^\circ \] |
| B. | \[100{}^\circ \] |
| C. | \[130{}^\circ \] |
| D. | \[80{}^\circ \] |
| Answer» C. \[130{}^\circ \] | |
| 1432. |
Which of the following is a reflector of light? |
| A. | Sun |
| B. | Moon |
| C. | Star |
| D. | Filament |
| Answer» C. Star | |
| 1433. |
An object approaches a convergent lens from the left of the lens with a uniform speed \[5\text{ }m\text{ }{{s}^{-1}}\] and stops at the focus. The image |
| A. | Moves away from the lens with a uniform speed \[5\text{ }m\text{ }{{s}^{-1}}\] |
| B. | Moves away from the lens with a uniform acceleration |
| C. | Moves away from the lens with a non-uniform acceleration |
| D. | Moves towards the lens with a non-uniform acceleration. |
| Answer» D. Moves towards the lens with a non-uniform acceleration. | |
| 1434. |
Which of the following is used by an E.N.T. doctor? |
| A. | Convex mirror |
| B. | Convex lens |
| C. | Plane mirror |
| D. | Concave mirror |
| Answer» E. | |
| 1435. |
Rectilinear propagation is |
| A. | mode of travelling in curved lines |
| B. | mode of travelling in straight lines |
| C. | ability to bend around obstacles |
| D. | displaying the phenomenon of diffraction |
| Answer» C. ability to bend around obstacles | |
| 1436. |
A mirage is observed when |
| A. | Density of air decreases with increase of height |
| B. | Density of air increases with increase of height |
| C. | Refractive index of air decreases with increase of height |
| D. | The Earth acts like a mirror, |
| Answer» C. Refractive index of air decreases with increase of height | |
| 1437. |
If the angle of incidence is \[80{}^\circ \], what will be the angle of reflection with respect to the normal drawn perpendicular at the point of reflection? |
| A. | \[80{}^\circ \] |
| B. | \[100{}^\circ \] |
| C. | \[160{}^\circ \] |
| D. | \[20{}^\circ \] |
| Answer» B. \[100{}^\circ \] | |
| 1438. |
The speed of light is |
| A. | 330 m/s |
| B. | 300,000,000 m/s |
| C. | 30,000 m/s |
| D. | 300,000,000 km/s |
| Answer» C. 30,000 m/s | |
| 1439. |
Read the following statements and select the correct option. Statement 1: It is not possible to photograph a virtual image. Statement 2: An image is said to be virtual if the reflected or refracted rays are diverging in nature. |
| A. | Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Statement 1 is false but statement 2 is true. |
| Answer» E. | |
| 1440. |
If you keep red coloured marbles in a blue coloured vase made of glass then the colour of red coloured marbles will appear |
| A. | Blue |
| B. | Red |
| C. | Black |
| D. | White |
| Answer» D. White | |
| 1441. |
What enables us to see objects? |
| A. | Light absorbed by an object |
| B. | Light that enters our eyes after it is reflected by an object |
| C. | Light dispersed by an object |
| D. | Light refracted through the object |
| Answer» C. Light dispersed by an object | |
| 1442. |
Light is |
| A. | an electromagnetic radiation |
| B. | a transverse wave |
| C. | mass less |
| D. | All of the above |
| Answer» E. | |
| 1443. |
Which of these surfaces cannot produce clear images? |
| A. | Rough surface |
| B. | Ideal surface |
| C. | Smooth surface |
| D. | Curved surface |
| Answer» B. Ideal surface | |
| 1444. |
Which of the following materials cannot be used to make a lens? |
| A. | Water |
| B. | Glass |
| C. | Plastic |
| D. | Clay |
| Answer» E. | |
| 1445. |
What is the angle of incidence and angle of reflection in the given figure'? |
| A. | \[{{360}^{o}}\] |
| B. | \[{{180}^{o}}\] |
| C. | \[{{90}^{o}}\] |
| D. | \[{{0}^{o}}\] |
| Answer» E. | |
| 1446. |
Why can't we see anything in a dark room? |
| A. | Everything is black in colour. |
| B. | Our eyes do not work in darkness. |
| C. | No light reaches our eyes. |
| D. | All the light gets scattered. |
| Answer» D. All the light gets scattered. | |
| 1447. |
Which of the following would you prefer to use while reading small letters found in a dictionary? |
| A. | A concave mirror |
| B. | A concave lens |
| C. | A convex mirror |
| D. | A convex lens |
| Answer» E. | |
| 1448. |
What is the angle of incidence when a ray of light incident on a concave mirror from its centre of curvature? |
| A. | \[{{90}^{o}}\] |
| B. | \[{{60}^{o}}\] |
| C. | \[{{45}^{o}}\] |
| D. | \[{{0}^{o}}\] |
| Answer» E. | |
| 1449. |
How many colours is white light made up of? |
| A. | A single colour |
| B. | Primary colours |
| C. | Five colours |
| D. | Seven colours |
| Answer» E. | |
| 1450. |
DIRECTIONS: On the basis of following diagram/ picture answer the questions given below: The diagram shows a ray of light reflected by a plane mirror. The angle between the incident ray and the reflected ray is\[80{}^\circ \]. What is the angle of incidence? |
| A. | \[40{}^\circ \] |
| B. | \[80{}^\circ \] |
| C. | \[50{}^\circ \] |
| D. | \[100{}^\circ \] |
| Answer» B. \[80{}^\circ \] | |