MCQOPTIONS
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MCQOPTIONS
This section includes 2016 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
A free neutron, unlike a free proton, is unstable. It decays into a proton, an electron and a/an __________. |
| A. | antineutrino |
| B. | positron |
| C. | meson |
| D. | muon |
| Answer» B. positron | |
| 352. |
An insulator offers _______ resistance. |
| A. | zero |
| B. | low |
| C. | appereciable |
| D. | high |
| Answer» E. | |
| 353. |
A device that can be used to test whether an object is carrying a charge or not is known as: |
| A. | Microscope |
| B. | Gyroscope |
| C. | Daleidoscope |
| D. | Electroscope |
| Answer» E. | |
| 354. |
Of the two bulbs, one glows brighter than the other. Which bulb has a higher resistance (Connecting the two bulbs one by one with the same voltage source, not together)? |
| A. | Brightness is independent of resistance |
| B. | The bright bulb |
| C. | Both have the same resistances |
| D. | The dim bulb |
| Answer» E. | |
| 355. |
If a ball is thrown vertically upwards with a velocity of 40 m/s, then what will be the magnitude of its displacement after 6 s?(Take g = 10 m/s2) |
| A. | 80 m |
| B. | 40 m |
| C. | 60 m |
| D. | 20 m |
| Answer» D. 20 m | |
| 356. |
If the water on the surface of a lake is just going to freeze, then what will be the temperature of water at the bottom? |
| A. | 0°C |
| B. | 4°C |
| C. | 3°C |
| D. | 100°C |
| Answer» C. 3°C | |
| 357. |
If both object distance 'u' and image distance 'v' from a concave mirror is -20 cm and both object size and image size is 4 cm, then what is the radius of curvature 'R' of the mirror? |
| A. | -18 cm |
| B. | -15 cm |
| C. | -10 cm |
| D. | -20 cm |
| Answer» E. | |
| 358. |
A porter lifts a luggage of 12 kg from the ground and puts it on his head 1.5m above the ground. Calculate the work done by him on the luggage (g = 10ms-2) |
| A. | 140 J |
| B. | 180 J |
| C. | 150 J |
| D. | 155 J |
| Answer» C. 150 J | |
| 359. |
Enriched uranium means uranium that has been enriched in isotope |
| A. | uranium-233 |
| B. | uranium-235 |
| C. | uranium-238 |
| D. | uranium-239 |
| Answer» C. uranium-238 | |
| 360. |
Name the unit in which the calorific value of fuel is expressed. |
| A. | Candela |
| B. | Kilojoule |
| C. | Kelvin |
| D. | Kilogram |
| Answer» C. Kelvin | |
| 361. |
Action and reaction _____. |
| A. | always act on same body |
| B. | are equal in magnitude |
| C. | are in same direction |
| D. | always act independently |
| Answer» C. are in same direction | |
| 362. |
Examine the two statements carefully and select the correct answer using the code given below.Statement I :The force on Moon due to Earth is the action, while the force on Earth due to Moon is the reactionStatement II:To every action, there is an equal and opposite reaction. |
| A. | Both the statements are individually true and Statement II is the correct explanation of Statement I |
| B. | Both the statements are individually true but Statement II is not the correct explanation of Statement I |
| C. | Statement I is true but Statement II is false |
| D. | Statement I is false but Statement II is true |
| Answer» B. Both the statements are individually true but Statement II is not the correct explanation of Statement I | |
| 363. |
A freely suspended magnet always aligns in the ________direction. |
| A. | North South |
| B. | North East |
| C. | East West |
| D. | South West |
| Answer» B. North East | |
| 364. |
An object of mass 2 kg is moving with an acceleration of 4m/s2. The net force acting on it is ________. |
| A. | 4.0 N |
| B. | 2.0 N |
| C. | 8.0 N |
| D. | 0.5 N |
| Answer» D. 0.5 N | |
| 365. |
In May 2019, the kilogram was redefined for the first time in 130 years. It will now be redefined by a fundamental property of nature known as: |
| A. | Magnetic Constant |
| B. | Electric Constant |
| C. | Gravitational Constant |
| D. | Planck's Constant |
| Answer» E. | |
| 366. |
A ball is dropped from a height of 10 m. It strikes the ground and rebounds up to a height of 2.5 m. During the collision, the per cent loss in the kinetic energy is: |
| A. | 100% |
| B. | 25% |
| C. | 50% |
| D. | 75% |
| Answer» E. | |
| 367. |
An object starts its motion from rest. It gains a speed of 5 m/s in 2s. Its acceleration will be _____. |
| A. | 2.5 m/s2 |
| B. | 1 m/s2 |
| C. | 2 m/s2 |
| D. | 0.4 m/s2 |
| Answer» B. 1 m/s2 | |
| 368. |
A myopic person has a power of -1.25 Dioptre. What is the focal length and nature of his lens? |
| A. | 50 cm and convex lens |
| B. | 80 cm and convex lens |
| C. | 50 cm and concave lens |
| D. | 80 cm and concave lens |
| Answer» E. | |
| 369. |
In total internal reflection, the light travels from ________. |
| A. | Rarer to denser medium and it occurs with no loss of intensity |
| B. | Denser to rarer medium and it occurs with no loss of intensity |
| C. | Rarer to denser medium and it occurs with loss of intensity |
| D. | Denser to rarer medium and it occurs with loss of intensity |
| Answer» C. Rarer to denser medium and it occurs with loss of intensity | |
| 370. |
Arrange the given rays in increasing order of frequency? |
| A. | Microwaves < radio waves < visible radiation < ultraviolet rays |
| B. | Radio waves < microwaves < visible radiation < ultraviolet rays |
| C. | Ultraviolet rays < visible radiation < radio waves < microwaves |
| D. | Visible radiation < radio waves < ultraviolet rays < microwaves |
| Answer» C. Ultraviolet rays < visible radiation < radio waves < microwaves | |
| 371. |
A continuous and closed path of an electric current is called as: |
| A. | Electric circuit |
| B. | Short circuit |
| C. | Magnetic circuit |
| D. | Junction |
| Answer» B. Short circuit | |
| 372. |
Lumen is the unit of ________. |
| A. | Luminous intensity |
| B. | Luminous flux |
| C. | Radioactivity |
| D. | Magnetic flux density |
| Answer» C. Radioactivity | |
| 373. |
Let a resistor having 4-ohm resistance be connected across the terminals of a 12-volt battery. Then the charge in coulomb passing through the resistor per second is : |
| A. | 12 |
| B. | 4 |
| C. | 3 |
| D. | 0.33 |
| Answer» D. 0.33 | |
| 374. |
Calculate the acceleration produced when a force of 100 N is applied to an object of mass 50 kg. |
| A. | 0.2 ms2 |
| B. | 0.2 ms-2 |
| C. | 2 ms-2 |
| D. | 2 ms2 |
| Answer» D. 2 ms2 | |
| 375. |
Radio carbon dating technique is used to estimate the age of |
| A. | rocks |
| B. | soil |
| C. | fossils |
| D. | buildings |
| Answer» D. buildings | |
| 376. |
______ is semiconductor. |
| A. | Ga |
| B. | Pb |
| C. | Ge |
| D. | Sn |
| Answer» D. Sn | |
| 377. |
Combination of two or more cells such that the positive terminal of one cell is connected to the negative terminal of the next cell are called ________. |
| A. | Multicell |
| B. | Wire |
| C. | Battery |
| D. | Fuse |
| Answer» D. Fuse | |
| 378. |
A body travelling with a speed of more than the velocity of sound in air is said to be ________. |
| A. | Ultrasonic |
| B. | Infrasonic |
| C. | Supersonic |
| D. | Hypersonic |
| Answer» D. Hypersonic | |
| 379. |
Body A having a mass of 2 kg and body B having a mass of 3 kg moving towards each other with velocities 4 m/s and 2 m/s, respectively, will collide and ______ in an elastic collision. |
| A. | move in the direction of B |
| B. | move in opposite direction |
| C. | move in the direction of A |
| D. | move perpendicular to the line of motion of both bodies |
| Answer» C. move in the direction of A | |
| 380. |
An 8 metric tonne engine pulls a train of 5 wagons each of 2 metric tonnes along a horizontal track. If the engine exerts a force of 3.5 × 104 N and the track is smooth. Then the force exerted by wagon 1 on wagon 2 is: |
| A. | 3.5 × 104 N |
| B. | 2.8 × 104 N |
| C. | 1.4 × 104 N |
| D. | 7.0 × 104 N |
| Answer» D. 7.0 × 104 N | |
| 381. |
Find the resistance (in mega Ω) of a wire of length 20 m, cross sectional area 1 cm2 and made of a material of resistivity 200 Ωm. |
| A. | 40 |
| B. | 4000 |
| C. | 80 |
| D. | 2000 |
| Answer» B. 4000 | |
| 382. |
A truck falls off a ledge and drops to the ground in 0.8 secs. How high is the ledge from the ground? (g = 10 m/s2) |
| A. | 0.32 m |
| B. | 320 m |
| C. | 3.2 m |
| D. | 32 m |
| Answer» D. 32 m | |
| 383. |
An object in which no light rays can pass through is called- |
| A. | opaque |
| B. | translucent |
| C. | transparent |
| D. | convex |
| Answer» B. translucent | |
| 384. |
In steady state |
| A. | The temperature at any location within the system does not vary with time |
| B. | There are no flow of heat |
| C. | There is no absorption of heat |
| D. | None of these |
| Answer» B. There are no flow of heat | |
| 385. |
______ Law of independent migration of ions states that limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte. |
| A. | Dirac |
| B. | Kohlrausch |
| C. | Schrödinger |
| D. | Feynman |
| Answer» C. Schrödinger | |
| 386. |
Electric current is the flow of ________. |
| A. | Light |
| B. | Water |
| C. | Electric charges |
| D. | Waves |
| Answer» D. Waves | |
| 387. |
On heating, the resistance of a semiconductor |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | first increases and then decreases |
| E. | None of the above / More than one of the above |
| Answer» C. remains same | |
| 388. |
A non-spherical shining spoon can generally be considered as a |
| A. | Spherical mirror |
| B. | Parabolic mirror |
| C. | Plane mirror |
| D. | Lens |
| Answer» D. Lens | |
| 389. |
If electric charge (Q) and time (t) are given, what will be the formula for finding electric current (l)? |
| A. | t / Q |
| B. | Q × t |
| C. | Q / t |
| D. | Q - t |
| Answer» D. Q - t | |
| 390. |
Energy possessed by a body due to its motion is ______. |
| A. | Kinetic energy |
| B. | chemical energy |
| C. | Potential energy |
| D. | None of these |
| Answer» B. chemical energy | |
| 391. |
A steam engine converts the heat energy of steam into ______. |
| A. | Electrical energy |
| B. | Chemical energy |
| C. | Mechanical energy |
| D. | Thermal energy |
| Answer» D. Thermal energy | |
| 392. |
Rainbow is formed due to the _______ of sunlight by tiny water droplets. |
| A. | Dispersion |
| B. | Reflection |
| C. | Polarization |
| D. | Interference |
| Answer» B. Reflection | |
| 393. |
A positron is an anti-particle of an electron, having the same mass but opposite charge to electron. Then, the minimum energy released in annihilation of matter of a pair of an electron and a positron is nearly: |
| A. | 2.01 MeV |
| B. | 1.20 MeV |
| C. | 1.02 MeV |
| D. | 0.51 MeV |
| Answer» D. 0.51 MeV | |
| 394. |
Optical fibre is based on which of the following principles?a. Principle of reflection of lightb. Principle of refraction of lightc. Principle of total internal reflectiond. Principle of dispersion of light |
| A. | a, b and c |
| B. | Only c |
| C. | b and d |
| D. | Only d |
| Answer» C. b and d | |
| 395. |
________ are used for communication in artificial satellites. |
| A. | Infrared waves |
| B. | Radio waves |
| C. | Ultraviolet (UV) rays |
| D. | Amplitude Modulation (A.M.) waves |
| Answer» C. Ultraviolet (UV) rays | |
| 396. |
A person with hypermetropia ______. |
| A. | Cannot see nearby objects clearly |
| B. | Cannot see distant objects clearly |
| C. | Cannot see both nearby and distant objects clearly |
| D. | No option is correct. |
| Answer» B. Cannot see distant objects clearly | |
| 397. |
How are the numerical value (N) and unit (U) of a physical quantity related- |
| A. | N ∝ U |
| B. | N ∝ \(\sqrt U\) |
| C. | N ∝ \(\frac{1}{U}\) |
| D. | N ∝ \(\frac{1}{\sqrt{U}}\) |
| Answer» D. N ∝ \(\frac{1}{\sqrt{U}}\) | |
| 398. |
According to Newton’s which law of motion is possible to swim? |
| A. | First law |
| B. | Second law |
| C. | Third law |
| D. | All options are correct. |
| Answer» D. All options are correct. | |
| 399. |
A bullet of mass 10 gm is fired with a velocity of 40 m/s from a gun of mass 8 kg. Find the recoil velocity (in m/s) of the gun. |
| A. | 2 |
| B. | 0.1 |
| C. | 4 |
| D. | 0.05 |
| Answer» E. | |
| 400. |
In which of the following devices, electrical energy is converted into mechanical energy? |
| A. | Battery |
| B. | Electric Generator |
| C. | Electric Motor |
| D. | Computer |
| Answer» D. Computer | |