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MCQOPTIONS
This section includes 731 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
Which of the following statement(s) is/are correct about Refraction Rules for a Converging Lens? |
| A. | Any incident ray travelling parallel to the principal axis of a converging lens will refract through the lens and travel through the focal point on the opposite side of the lens. |
| B. | Any incident ray travelling through the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis. |
| C. | Both A & B |
| D. | None of the above |
| Answer» D. None of the above | |
| 352. |
Consider the following statement(s) related to the Concave lens I. When parallel rays of light pass through a concave lens the refracted rays diverge so that they appear to come from one point called the principal focus. II. The distance between the principal focus and the centre of the lens is called the focal length. III. The image formed is virtual and bigger Which is/are correct statement (s) is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» B. Only II | |
| 353. |
Which of the following statement(s) is/are correct about Magnifying Glass? I. It produces an upright, magnified virtual image. II. The virtual image produced is on the same side of the lens as the object. III. For a magnified image to be observed the distance between the object and the lens must be shorter than the focal length of the lens. Which is/are correct statement (s) is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both II & III |
| D. | All of the above |
| Answer» E. | |
| 354. |
Which of the following is/are the components of Camera? |
| A. | The body which is light tight and contains all the mechanical parts. |
| B. | The lens which is a convex (converging) lens). |
| C. | The film or a charged couple device in the case of a digital camera. |
| D. | All of the above |
| Answer» E. | |
| 355. |
Which of the following statement(s) is/are correct about the Refraction Rules for a Diverging Lens? |
| A. | Any incident ray travelling parallel to the principal axis of a diverging lens will refract through the lens and travel in line with the focal point (i.e., in a direction such that its extension will pass through the focal point). |
| B. | Any incident ray travelling towards the focal point on the way to the lens will refract through the lens and travel parallel to the principal axis. |
| C. | Both A & B |
| D. | None of the above |
| Answer» D. None of the above | |
| 356. |
What is the advantage of parallel connection of circuits? |
| A. | Same voltage is available |
| B. | All appliances get fused |
| C. | Fluctuation |
| D. | All of the above |
| Answer» B. All appliances get fused | |
| 357. |
Which colour of insulation covering is there on the earth wire that goes from main switch to our rooms? |
| A. | Red |
| B. | Black |
| C. | Green |
| D. | Yellow |
| Answer» D. Yellow | |
| 358. |
Which of the following wires is necessary in the house? |
| A. | Live wire |
| B. | Earth wire |
| C. | Neutral wire |
| D. | All of the above |
| Answer» E. | |
| 359. |
Which of the following is the function of superconductor? |
| A. | It conduct electricity at low temperature |
| B. | It offer high resistance to the flow of current |
| C. | It offer no resistance to the flow of electricity |
| D. | It conduct electricity at high temperatures |
| Answer» D. It conduct electricity at high temperatures | |
| 360. |
Which statement (s) is/are involves the principle of capillary action? |
| A. | Oil raise up the wick in a lamp |
| B. | It is enhanced in trees by branching, evaporation at the leaves creating depressurization |
| C. | Both A & B |
| D. | None of the above |
| Answer» D. None of the above | |
| 361. |
Consider the following statement(s) regarding natural phenomena i.e Mirage I. It is an optical phenomenon that creates the illusion of water and results from the refraction of light through a non-uniform medium. II. It is happen due to the refraction of light Which is/are correct statement (s) is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 362. |
Consider the following statement (s) related to the Moment of inertia I. It is the name given to rotational inertia, the rotational analog of mass for linear motion. II. The moment of inertia of a point mass with respect to an axis is defined as the product of the mass times the distance from the axis squared. Which is/are correct statement (s) is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 363. |
Which of the following is the SI unit of viscosity? |
| A. | Poiseuille (PI) |
| B. | Pascal |
| C. | Degree |
| D. | None of the above |
| Answer» B. Pascal | |
| 364. |
Consider the following statement (s) about Doppler Effect. I. Johann Christian Doppler, an Austrian physicist first proposed Doppler effect in 1842. II. Doppler Effect is observed that the pitch of the sound is higher when we approach a stationary source of sound with high speed. Which is/are correct statement (s) is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 365. |
Consider the following statement (s) regarding Conductors I. Conductors are materials that permit electrons to flow freely from particle to particle. II. Conductors are materials that permit electrons to flow freely from atom to atom. Which is/are correct statement (s)is/are correct? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» B. Only II | |
| 366. |
Which of the following statement (s) is/are correct about thermal expansion |
| A. | The change in temperature of a body causes expansion or contraction of that body. |
| B. | Most of the substances expand on heating and contract on cooling. |
| C. | Both A & B |
| D. | None of the above |
| Answer» D. None of the above | |
| 367. |
Why impurities are added to a semi-conductor? |
| A. | To increase its life |
| B. | To enables it to withstand higher voltages |
| C. | To increase its electrical conductivity |
| D. | To increase its electrical resistivity |
| Answer» D. To increase its electrical resistivity | |
| 368. |
Which of the following is the correct reason for spherical droplet of mercury as compared to the droplet of water spreads on the glass plates? |
| A. | Due to metallic properties of Mercury |
| B. | Mercury is heavier than water |
| C. | Cohesion of mercury is greater than its adhesion with glass |
| D. | Cohesion of water is greater than its adhesion with glass |
| Answer» D. Cohesion of water is greater than its adhesion with glass | |
| 369. |
What do we called when the sound of frequency will be below 20 Hz? |
| A. | Audio sounds |
| B. | Infrasonic |
| C. | Ultrasonic |
| D. | Supersonics |
| Answer» C. Ultrasonic | |
| 370. |
Which of the following is the property of RADAR? |
| A. | Locating submerged submarines |
| B. | Receiving signals in a radio receiver |
| C. | Locating geostationary satellites |
| D. | Detecting and locating the position of objects such as aeroplanes |
| Answer» E. | |
| 371. |
Which of the following statement (s) is/are correct about viscosity? |
| A. | It is a measure of its resistance to gradual deformation by shear stress or tensile stress. |
| B. | It is typically measured in dynes/cm, the force in dynes required to break a film of length 1 cm. |
| C. | It is the ability of a body to resist a distorting influence or stress and to return to its original size and shape when the stress is removed. |
| D. | None of the above |
| Answer» B. It is typically measured in dynes/cm, the force in dynes required to break a film of length 1 cm. | |
| 372. |
Consider the following statement (s) about stellar scintillation I.The scientific name for the twinkling of stars. II.We see them from the Earth's surface because we are viewing them through thick layers of turbulent (moving) air in the Earth's atmosphere. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 373. |
Consider the following statement (s) is not related with infrasonic frequency I.It refers to sound waves below the frequencies of audible sound, and nominally includes anything under 20 Hz. II.It refers to sound waves below the frequencies of audible sound, and nominally includes anything beyond 20 Hz. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» C. Both I & II | |
| 374. |
Which of the following statement (s) is correct about luminous Intensity? |
| A. | It is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle. |
| B. | The SI unit of luminous intensity is the candela (cd), an SI base unit. |
| C. | |
| D. | Both A & B |
| Answer» E. | |
| 375. |
Consider the following statement (s) is associated with the amplitude I.It is the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. II.It is equal to one-half the length of the vibration path. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 376. |
Consider the following statement (s) about frequency I.It is describes as the number of waves that pass a fixed place in a given amount of time. II.It is measured in the hertz unit, named in honour of the 19th-century German physicist Heinrich Rudolf Hertz. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» D. All of the above | |
| 377. |
Which of the following is/ are correct definition of types of friction? I.Dry friction resists relative lateral motion of two solid surfaces in contact. II.Fluid friction describes the friction between layers of a viscous fluid that are moving relative to each other. III.Lubricated friction is a case of fluid friction where a lubricant fluid separates two solid surfaces. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | All of the above |
| Answer» E. | |
| 378. |
Consider the following statement (s) related to the force of friction I.It is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. II.When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | Neither I nor II |
| Answer» D. Neither I nor II | |
| 379. |
Consider the following statement (s) related to the Magnetism I.It is a class of physical phenomena that are mediated by magnetic fields. II.Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | Neither I nor II |
| Answer» D. Neither I nor II | |
| 380. |
What type of a mirror is used in anti-shop-lifting-devices? |
| A. | Concave mirror |
| B. | Convex mirror |
| C. | Plane mirror |
| D. | None of the above |
| Answer» C. Plane mirror | |
| 381. |
Dental mirror is what type of a mirror? |
| A. | Convex mirror |
| B. | Concave mirror |
| C. | Plane mirror |
| D. | Both (b) and (c) |
| Answer» E. | |
| 382. |
Due to which phenomena light rays emerging from a cinema machine spread wide on the screen? |
| A. | Dispersion |
| B. | Diffraction |
| C. | Scattering |
| D. | Refraction |
| Answer» C. Scattering | |
| 383. |
Due to which phenomena the stick if immersed in water appears to be bent? |
| A. | Reflection |
| B. | Dispersion |
| C. | Refraction |
| D. | Scattering |
| Answer» D. Scattering | |
| 384. |
In projectors which lenses are used? |
| A. | Convex lens |
| B. | Concave lens |
| C. | Bipolar lens |
| D. | Both (a) and (b) |
| Answer» B. Concave lens | |
| 385. |
Which glasses or lens are used to correct the short sighted eye defect? |
| A. | Concave Lens |
| B. | Convex Lens |
| C. | Bipolar Lens |
| D. | None of the above |
| Answer» B. Convex Lens | |
| 386. |
What is the power of concave lens? |
| A. | Positive |
| B. | Negative |
| C. | Both |
| D. | None of the above |
| Answer» C. Both | |
| 387. |
Why the colour of the ocean appears blue? |
| A. | Because the sunlight falling on it is reflected. |
| B. | Because the sunlight falling on it is refracted. |
| C. | Because the sunlight falling on it is absorbed. |
| D. | Because the sunlight falling on it is scattered. |
| Answer» E. | |
| 388. |
To increase the magnifying power of a telescope, the focal length of |
| A. | Objective lens should be increased. |
| B. | Objective lens should be decreased. |
| C. | Eye-piece lens should be increased. |
| D. | Eye-piece lens should be decreased. |
| Answer» E. | |
| 389. |
In the case of a concave mirror, the image of an object is |
| A. | Real, erect and diminished when the object lies beyond the centre of curvature. |
| B. | Real, inverted and of the same size as the object when it lies between the centre of curvature and focus. |
| C. | Real, inverted and diminished when the object lies beyond the centre of curvature. |
| D. | Not real, large and unproportional. |
| Answer» D. Not real, large and unproportional. | |
| 390. |
The image formed on a cinema screen is an example of: |
| A. | Real Image |
| B. | Virtual Image |
| C. | Point Image |
| D. | Plane Image |
| Answer» B. Virtual Image | |
| 391. |
We see the image of our face when we look into the mirror. It is due to: |
| A. | Interference |
| B. | Diffraction |
| C. | Polarisation |
| D. | Reflection |
| Answer» E. | |
| 392. |
Anything which gives out light rays is called : |
| A. | Real Image |
| B. | Virtual Image |
| C. | Object |
| D. | Image |
| Answer» D. Image | |
| 393. |
When a parallel beam of incident light is reflected as a parallel beam in one direction, this reflection is known as: |
| A. | Diffuse reflection |
| B. | Interference |
| C. | Diffraction |
| D. | Regular reflection |
| Answer» E. | |
| 394. |
Which statement is correct about the laws of reflection: (i) The incident ray, normal ray and the reflected ray all lie in the same plane. (ii) The angle of reflection is always equal to the angle of incidence. (iii) The angle of incidence is equal to the angle formed by normal ray. (iv) The angle of reflection is equal to 90o. Options are: |
| A. | Both (i) and (ii) |
| B. | Both (ii) and (iii) |
| C. | Both (iii) and (iv) |
| D. | (i), (ii) and (iv) are correct |
| Answer» B. Both (ii) and (iii) | |
| 395. |
An incident ray is: |
| A. | The point at which incident ray falls on the mirror. |
| B. | The ray of light which falls on the mirror surface. |
| C. | |
| Answer» D. | |
| 396. |
Name a metal which is the best reflector of light? |
| A. | Gold |
| B. | Silver |
| C. | Iron |
| D. | Magnesium |
| Answer» C. Iron | |
| 397. |
Which object does not reflect more light? |
| A. | Polished Surface |
| B. | Shining Surface |
| C. | Unpolished |
| D. | Both A and B |
| Answer» D. Both A and B | |
| 398. |
Why light is said to have a dual nature? |
| A. | It exhibits the properties of wave and particles. |
| B. | It exhibits the properties of reflection and diffraction. |
| C. | It has both interference and polarisation effect. |
| D. | None of the above |
| Answer» B. It exhibits the properties of reflection and diffraction. | |
| 399. |
On which theory nature of light depends upon: |
| A. | Wave theory |
| B. | Particle theory |
| C. | Both A and B |
| D. | Only A |
| Answer» B. Particle theory | |
| 400. |
On an object the work done does not depend upon: |
| A. | Displacement |
| B. | Angle between force and displacement |
| C. | Force applied |
| D. | Initial velocity of an object |
| Answer» E. | |