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.
| 401. |
A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. What is the reason behind this phenomenon? |
| A. | Diffraction of light |
| B. | Internal reflection of light |
| C. | Refraction of light |
| D. | Reflection of light |
| Answer» D. Reflection of light | |
| 402. |
An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 600 J, find the height at which the object is with respect to the ground. Given g = 10 ms-2 |
| A. | 5 m |
| B. | 5 ms-2 |
| C. | 5 ms2 |
| D. | -5 m |
| Answer» B. 5 ms-2 | |
| 403. |
Normal ray, incident ray and reflected ray lie on the same plane in _________. |
| A. | Refractive index |
| B. | Both Reflection and Refraction |
| C. | Reflection |
| D. | Refraction |
| Answer» B. Both Reflection and Refraction | |
| 404. |
________ is defined as the rate of doing work. |
| A. | Energy |
| B. | Force |
| C. | Power |
| D. | Momentum |
| Answer» D. Momentum | |
| 405. |
Newton’s Second Law is usually stated as F = ma. The original statement of the law is |
| A. | Force is equal to mass multiplied by acceleration |
| B. | Force is proportional to the rate of change of momentum |
| C. | Force is a function of acceleration and momentum of the body |
| D. | None of the above |
| Answer» C. Force is a function of acceleration and momentum of the body | |
| 406. |
A long-jumper runs before jumping because _____. |
| A. | he covers a greater distance |
| B. | he loses momentum |
| C. | he gains confidence by running |
| D. | he gains momentum |
| Answer» E. | |
| 407. |
In which of the following case can Total Internal Reflection (when the angle of incidence is greater than the critical angle) take place?When light travels from - |
| A. | Glass to Diamond |
| B. | Diamond to Air |
| C. | Air to Water |
| D. | Air to Glass |
| Answer» C. Air to Water | |
| 408. |
A wooden block of mass m1 kg accelerates at 10 ms-2 when a force of 5 N acts on it. Another block of mass m2 kg accelerates at 20 ms-2 when the same force acts on it. If both the blocks are tied together and the same force acts on their combination, the acceleration will be about: |
| A. | 6.67 ms-2 |
| B. | 1.67 ms-2 |
| C. | 5.67 ms-2 |
| D. | 4.67 ms-2 |
| Answer» B. 1.67 ms-2 | |
| 409. |
Density is calculated by |
| A. | Mass*volume |
| B. | Mass/volume |
| C. | Mass-volume |
| D. | Mass/volume*2 |
| Answer» C. Mass-volume | |
| 410. |
1 m = ________ nm |
| A. | 106 |
| B. | 107 |
| C. | 108 |
| D. | 109 |
| Answer» E. | |
| 411. |
An ammeter has ____________ resistance, so that it passes maximum current through it. |
| A. | Very high |
| B. | Infinite |
| C. | Very less |
| D. | High |
| Answer» D. High | |
| 412. |
Light-emitting diode (LED) is used in electronic devices such as television leaves _____.- A. Ultraviolet raysB. X-ray C. Radio WavesD. Visible Light |
| A. | B |
| B. | A |
| C. | C |
| D. | D |
| Answer» E. | |
| 413. |
A component of a given size that offers a low resistance is a: |
| A. | Poor conductor |
| B. | resistor |
| C. | insulator |
| D. | good conductor |
| Answer» E. | |
| 414. |
On increasing the temperature of solids, the kinetic energy of the particles ________. |
| A. | First increases and then decreases |
| B. | Is constant |
| C. | Increases |
| D. | Decreases |
| Answer» D. Decreases | |
| 415. |
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as λUV, λVIS and λIR respectively, then which one of the following gives the correct relationship among these wavelengths? |
| A. | λUV < λIR < λVIS |
| B. | λUV > λVIS > λIR |
| C. | λUV > λIR > λVIS |
| D. | λUV < λVIS < λIR |
| Answer» E. | |
| 416. |
If the speed of a moving magnet inside a coil increases, the electric current in the coil |
| A. | increases |
| B. | decreases |
| C. | reverses |
| D. | remains the same |
| Answer» B. decreases | |
| 417. |
A batsman hits the ball for a boundary past the bowler i.e. four runs. The batsman thus _________. |
| A. | changes the direction and speed of the ball |
| B. | does not change the direction but speed only |
| C. | does not change the speed but direction only |
| D. | does not change either direction or speed |
| Answer» B. does not change the direction but speed only | |
| 418. |
A periscope makes use of: |
| A. | Three spherical mirrors |
| B. | Two spherical mirrors |
| C. | Two plane mirrors |
| D. | Three plane mirrors |
| Answer» D. Three plane mirrors | |
| 419. |
In which of the following modes of heat transfer, do the molecules travel from the hotter part of a body to the colder part ? |
| A. | Conduction |
| B. | Convection |
| C. | radiation |
| D. | all of these |
| Answer» B. Convection | |
| 420. |
In a box type solar cooker, the part which is responsible for producing greenhouse effect is: |
| A. | Glass sheet |
| B. | Black coating inside the box |
| C. | The vessel in the cooker box |
| D. | Plane mirror reflector |
| Answer» B. Black coating inside the box | |
| 421. |
A concave mirror produces 3 times magnified real image of an object placed at 5 cm in front of it. At what distance from the front of the mirror is the image located? |
| A. | 15 cm |
| B. | 10 cm |
| C. | 20 cm |
| D. | 5 cm |
| Answer» B. 10 cm | |
| 422. |
An object is placed in front of a concave mirror at a point between its curvature and focus. The image will be formed at: |
| A. | A point between the focus and the centre of curvature |
| B. | The centre of curvature |
| C. | A point beyond the centre of curvature |
| D. | The focus |
| Answer» D. The focus | |
| 423. |
Fathometer works on the principle of ________. |
| A. | reflection of magnetic waves |
| B. | reflection of light waves |
| C. | reflection of sound waves |
| D. | reflection of radio waves |
| Answer» D. reflection of radio waves | |
| 424. |
Brightness of the bulb decreases gradually with its period of use because of: |
| A. | Evaporation of metal from filament of bulb |
| B. | Decrease in resistance of bulb |
| C. | Decrease in electric supply to the bulb |
| D. | None of the above |
| Answer» B. Decrease in resistance of bulb | |
| 425. |
Contact lenses are normally made of?A. TeflonB. HydrogelC. NylonD. Mica |
| A. | B |
| B. | A |
| C. | D |
| D. | C |
| Answer» B. A | |
| 426. |
Hubble's Law is related to _______. |
| A. | Heat |
| B. | Sound |
| C. | Astronomy |
| D. | Air Pressure |
| Answer» D. Air Pressure | |
| 427. |
On the basis of which principle does soap clean surfaces? |
| A. | Viscosity |
| B. | Flotation |
| C. | Elasticity |
| D. | Surface tension |
| Answer» E. | |
| 428. |
If the velocity of a body is doubled its kinetic energy _______. |
| A. | is also doubled |
| B. | becomes half |
| C. | becomes 1/4th |
| D. | become 4 times |
| Answer» E. | |
| 429. |
A compressed spring possesses _________. |
| A. | Electric energy |
| B. | Chemical energy |
| C. | Potential energy |
| D. | Kinetic energy |
| Answer» D. Kinetic energy | |
| 430. |
A simple pendulum consists of a small metallic ball or a piece of stone suspended from a rigid stand by a thread. The metallic ball is called the ______ of the pendulum. |
| A. | Hinge |
| B. | Bob |
| C. | Doorknob |
| D. | Head |
| Answer» C. Doorknob | |
| 431. |
An object of mass 100 kg is accelerated uniformly from a velocity of 5 ms-1 to 15 ms-1 in 5 s. Find the magnitude of force exerted on the object. |
| A. | 200 J |
| B. | 200 Kg |
| C. | 200 Pa |
| D. | 200 N |
| Answer» E. | |
| 432. |
Name the paradox which states that “an object can float in a quantity of water that has less volume than the object itself, if its average density is less than that of water.” |
| A. | Hawking’s Paradox |
| B. | Carroll’s Paradox |
| C. | Aristotle’s Wheel Paradox |
| D. | Archimedes Paradox |
| Answer» E. | |
| 433. |
Pressure = _______. |
| A. | Thrust × Area |
| B. | Area/Thrust |
| C. | Thrust/Area |
| D. | Area + Thrust |
| Answer» D. Area + Thrust | |
| 434. |
2H1 + 3H1 → 4He2 + ___________ + energy. Find the missing element/s. |
| A. | 1 proton |
| B. | 1 neutron |
| C. | 1 electron |
| D. | 1 positron |
| Answer» C. 1 electron | |
| 435. |
86Kr36 and 86Sr38 are examples of? |
| A. | Isotopes |
| B. | Isomers |
| C. | Isobars |
| D. | Isotones |
| Answer» D. Isotones | |
| 436. |
Identify the vector quantity from the following: |
| A. | Heat |
| B. | Acceleration |
| C. | Work |
| D. | Both 2 and 3 |
| Answer» C. Work | |
| 437. |
An isotope of barium has 82 neutrons and 56 electrons. What is it's mass number? |
| A. | 26 |
| B. | 82 |
| C. | 56 |
| D. | 138 |
| Answer» E. | |
| 438. |
Identify the material having the highest coefficient of volume expansion. |
| A. | Brass |
| B. | Hard rubber |
| C. | Mercury |
| D. | Iron |
| Answer» C. Mercury | |
| 439. |
A liquid drop, contracts because of the attraction of its particles and occupies the smallest possible area. This phenomenon is known as - |
| A. | Surface Tension |
| B. | Buoyancy |
| C. | Cavitation |
| D. | Viscosity |
| Answer» B. Buoyancy | |
| 440. |
On increasing temperature, the resistance of semiconductors: |
| A. | increases |
| B. | decreases |
| C. | remains same |
| D. | first rises then falls |
| Answer» C. remains same | |
| 441. |
Quantities that are used to describe laws of physics are called |
| A. | atomic quantities |
| B. | nuclear quantities |
| C. | mechanical quantities |
| D. | physical quantities |
| Answer» E. | |
| 442. |
_______ is defined as the time rate at which work is done or energy is transferred. |
| A. | Power |
| B. | displacement |
| C. | force |
| D. | distance |
| Answer» B. displacement | |
| 443. |
Let g be the acceleration due to gravity on the surface of Earth. The acceleration due to gravity on the surface of Moon is |
| A. | 6 g |
| B. | g/6 |
| C. | g |
| D. | g/3 |
| Answer» C. g | |
| 444. |
If the reflecting surface of a spherical mirror curves outwards, then it is a ________ mirror. |
| A. | Convex |
| B. | Concave |
| C. | Plane |
| D. | Plano Convex |
| Answer» B. Concave | |
| 445. |
Friction can be reduced by which of the following?I. Polishing surfacesII. Use of lubricantsIII. Decreasing area of contact |
| A. | Only I |
| B. | Only II |
| C. | Only I and II |
| D. | All options are correct |
| Answer» E. | |
| 446. |
Electric bulb filament is made of__________. |
| A. | Copper |
| B. | Tungsten |
| C. | Aluminum |
| D. | Lead |
| Answer» C. Aluminum | |
| 447. |
Modern movie songs released are the best in quality of sound. The rich quality of sound is due to which one of the following? |
| A. | A note of high frequency |
| B. | A note of high amplitude |
| C. | Consists many harmonics |
| D. | Consists the fundamental frequency |
| Answer» D. Consists the fundamental frequency | |
| 448. |
Calculate the time period (in seconds) of a sound wave of wavelength 5m travelling with a speed of 500 m/s. |
| A. | 0.01 |
| B. | 2500 |
| C. | 0.02 |
| D. | 1250 |
| Answer» B. 2500 | |
| 449. |
Nylon is used for parachutes because it: |
| A. | light weight and strong |
| B. | is eco-friendly |
| C. | does not catch fire easily |
| D. | is poor conductor of heat |
| Answer» B. is eco-friendly | |
| 450. |
One kWh is equal to ______. |
| A. | 3.6 x 109 J |
| B. | 3.6 x 107 J |
| C. | 3.6 x 106 J |
| D. | 3.6 x 108 J |
| Answer» D. 3.6 x 108 J | |