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.
| 1501. |
How much calorie of energy is released by a boiled egg ? |
| A. | 0 |
| B. | 0 |
| C. | 0 |
| D. | 7 |
| Answer» E. | |
| 1502. |
Conversion of heat into electrical energy is achieved by using : |
| A. | mmeter |
| B. | ydrometer |
| C. | oltmeter |
| D. | hermocouple |
| Answer» E. | |
| 1503. |
Microphone is a device which transforms the |
| A. | ound signal into current signal |
| B. | urrent signal into sound signal |
| C. | ound signal into light signal |
| D. | ight signal into sound signal |
| Answer» B. urrent signal into sound signal | |
| 1504. |
An object which absorbs all colours and reflects none appears: |
| A. | hite |
| B. | rey |
| C. | lue |
| D. | lack |
| Answer» E. | |
| 1505. |
Which one of the following is responsible for the working of Newton's colour disc experiment ? |
| A. | ormation of pure spectra |
| B. | ormation of impure spectra |
| C. | ersistence of vision |
| D. | rinciple of complementary colour |
| Answer» D. rinciple of complementary colour | |
| 1506. |
Which one of the following instruments is used to study dispersion of light ? |
| A. | icroscope |
| B. | elescope |
| C. | pectrometer |
| D. | hotometer |
| Answer» D. hotometer | |
| 1507. |
During washing of clothes, we use indigo due to its |
| A. | etter cleaning action |
| B. | roper pigmental composition |
| C. | igh glorious nature |
| D. | ery low cost |
| Answer» C. igh glorious nature | |
| 1508. |
The sky appears blue because |
| A. | ll colours interfere to produce blue |
| B. | n white light, the blue component dominates |
| C. | he atmosphere scatters blue colour more than the others |
| D. | t is actually blue |
| Answer» D. t is actually blue | |
| 1509. |
Red light is used for signals because it has |
| A. | ong wavelength |
| B. | igh intensity |
| C. | igh frequency |
| D. | ow refraction in the medium |
| Answer» B. igh intensity | |
| 1510. |
Rainbows are produced when sunlight : |
| A. | ncident on rain drops hanging in the atmosphere is dispersed after suffering refraction |
| B. | ncident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection. |
| C. | ncident on raindrops hanging in the atmosphere is dispresed after suffering reflection. |
| D. | one of the given statements is correct. |
| Answer» C. ncident on raindrops hanging in the atmosphere is dispresed after suffering reflection. | |
| 1511. |
The colour of sky appears blue due to |
| A. | eflection |
| B. | efraction |
| C. | cattering of shorter wave lengths |
| D. | ispersion |
| Answer» D. ispersion | |
| 1512. |
Which combination of colour is the most convenient during day and night time ? |
| A. | rgane and blue |
| B. | hite and black |
| C. | ellow and blue |
| D. | ed and green |
| Answer» E. | |
| 1513. |
When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is |
| A. | eflection of light |
| B. | efraction of light |
| C. | ispersion of light |
| D. | cattering of light |
| Answer» E. | |
| 1514. |
In sunlight a rose appears red. In green light, the same rose appears |
| A. | ed |
| B. | lack |
| C. | reen |
| D. | ellow |
| Answer» C. reen | |
| 1515. |
Which colour is the complementary colour of yellow ? |
| A. | lue |
| B. | reen |
| C. | range |
| D. | ed |
| Answer» B. reen | |
| 1516. |
Mist is caused by |
| A. | ry ice |
| B. | ce at low temperature |
| C. | ater vapour at low temperature |
| D. | arbon-monoxide in solid form |
| Answer» D. arbon-monoxide in solid form | |
| 1517. |
The splitting of different colours of light in a prism is : |
| A. | eflection of light |
| B. | isperson of light |
| C. | iffraction of light |
| D. | efraction of light |
| Answer» C. iffraction of light | |
| 1518. |
Which colour has the highest frequency? |
| A. | iolet |
| B. | ed |
| C. | ndigo |
| D. | reen |
| Answer» B. ed | |
| 1519. |
What colour does blue and yellow make? |
| A. | reen |
| B. | lack |
| C. | ed |
| D. | hite |
| Answer» B. lack | |
| 1520. |
Which of the following is used to split white light into different colours ? |
| A. | lass slab |
| B. | onvex lens |
| C. | oncave lens |
| D. | rism |
| Answer» E. | |
| 1521. |
The splitting of white light into its components is due to: |
| A. | eflection |
| B. | efraction |
| C. | ransmission |
| D. | ispersion |
| Answer» E. | |
| 1522. |
Light scattering takes place in |
| A. | olloidal solutions |
| B. | cidic solutions |
| C. | lectrolyte solutions |
| D. | asic solutions |
| Answer» B. cidic solutions | |
| 1523. |
The sky appears blue because of |
| A. | tmospheric water vapour |
| B. | cattering of light |
| C. | eflection on sea water |
| D. | mision of blue wavelength by the sun |
| Answer» C. eflection on sea water | |
| 1524. |
The phenomenon of light associated with the appearance of blue colour of the sky is |
| A. | nterference |
| B. | eflection |
| C. | efraction |
| D. | cattering |
| Answer» E. | |
| 1525. |
The blue colour of sky is due to |
| A. | eflection of sunlight |
| B. | efraction of sunlight |
| C. | cattering of shorter wavelengths of sunlight in the atmosphere |
| D. | cattering of longer wavelengths of sunlight in the atmosphere |
| Answer» D. cattering of longer wavelengths of sunlight in the atmosphere | |
| 1526. |
A thin oil film on a water surface appears coloured because of |
| A. | eflection |
| B. | nterference |
| C. | iffraction |
| D. | olarization |
| Answer» C. iffraction | |
| 1527. |
Conversion of sound energy into electrical energy is done by |
| A. | olar cell |
| B. | ramophone |
| C. | icrophone |
| D. | oudspeaker |
| Answer» D. oudspeaker | |
| 1528. |
The work done by the string of a simple pendulum during one complete oscillation is equal to |
| A. | otal energy of the pendulum |
| B. | inetic energy of the pendulum |
| C. | otential energy of the pendulum |
| D. | ero |
| Answer» E. | |
| 1529. |
In a photocell light energy is converted into |
| A. | otential energy |
| B. | hemical energy |
| C. | eat energy |
| D. | lectrical energy |
| Answer» E. | |
| 1530. |
The device used to convert solar energy into electricity is |
| A. | hotovoltaic cell |
| B. | aniell cell |
| C. | lectrochemical cell |
| D. | alvanic cell |
| Answer» B. aniell cell | |
| 1531. |
If both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by |
| A. | times |
| B. | times |
| C. | times |
| D. | 6 times |
| Answer» D. 6 times | |
| 1532. |
A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is |
| A. | ero |
| B. | ne |
| C. | ess than one |
| D. | ore than one |
| Answer» B. ne | |
| 1533. |
In a rechargeable cell what kind of energy is stored within the cell? |
| A. | lectrical energy |
| B. | otential energy |
| C. | hemical energy |
| D. | inetic energy |
| Answer» D. inetic energy | |
| 1534. |
Necessary element of change in solar energy to electrical energy |
| A. | erillium |
| B. | ilicon |
| C. | antelum |
| D. | ure Copper |
| Answer» C. antelum | |
| 1535. |
A person lifts luggage of 20 kg from the ground and puts it on his head 2m above the ground. Calculate the work done by him. (g = 10 ) |
| A. | 0 J |
| B. | 00J |
| C. | 00J |
| D. | 0J |
| Answer» C. 00J | |
| 1536. |
A mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2] |
| A. | 568 J |
| B. | 568 C |
| C. | 568 W |
| D. | 568 N |
| Answer» B. 568 C | |
| 1537. |
The energy stored in a watch spring is |
| A. | inetic energy |
| B. | otential energy |
| C. | eat energy |
| D. | hemical energy |
| Answer» C. eat energy | |
| 1538. |
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2) |
| A. | J |
| B. | 00 J |
| C. | 00 J |
| D. | 00 J |
| Answer» B. 00 J | |
| 1539. |
In which of the following cases, kinetic energy is being used in performing work ? |
| A. | addling the bicycle to cover a distance |
| B. | riving a car to cover a distance |
| C. | ind mill grinding wheat grain |
| D. | owing a boat in the lake |
| Answer» C. ind mill grinding wheat grain | |
| 1540. |
Solar energy is converted into chemical energy during |
| A. | ranspiration |
| B. | hotosynthesis |
| C. | iffusion |
| D. | smosis |
| Answer» C. iffusion | |
| 1541. |
If the velocity of a body is halved its kinetic energy ________ |
| A. | ecome 4 times |
| B. | ecomes 1/4 th |
| C. | s also doubled |
| D. | ecomes half |
| Answer» C. s also doubled | |
| 1542. |
A body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________ |
| A. | 0 J |
| B. | 0 J |
| C. | 0 J |
| D. | 0 J |
| Answer» B. 0 J | |
| 1543. |
Vehicles use ________ to see the objects coming from behind. |
| A. | oncave lens |
| B. | onvex lens |
| C. | onvex mirror |
| D. | oncave mirror |
| Answer» C. onvex mirror | |
| 1544. |
The part of the eye having the largest refractive index is : |
| A. | ornea |
| B. | queous humor |
| C. | ens |
| D. | itreous humor |
| Answer» D. itreous humor | |
| 1545. |
Dioptre is the unit of |
| A. | ower of a lens |
| B. | ocal length of a lens |
| C. | ight intensity |
| D. | ound intensity |
| Answer» B. ocal length of a lens | |
| 1546. |
Which one of the following determines the sharpness of image in a camera ? |
| A. | he aperture |
| B. | he exposure time |
| C. | he focal length of the lens |
| D. | ize of the camera |
| Answer» B. he exposure time | |
| 1547. |
A concave lens always forms an image which is |
| A. | eal and erect |
| B. | irtual and erect |
| C. | eal and inverted |
| D. | irtual and inverted |
| Answer» C. eal and inverted | |
| 1548. |
Danger signals are generally red as red light |
| A. | s least bright |
| B. | ndergoes least deviation |
| C. | as lowest velocity |
| D. | ives comfort to eye |
| Answer» C. as lowest velocity | |
| 1549. |
Which of the following statements is true when we see ''rainbow' ? |
| A. | e face sun and raindrops |
| B. | he Sun remains behind us and we face raindrops |
| C. | n light rainfall, we face Sun |
| D. | he sky remains clear and the sun is at lower position in the sky |
| Answer» C. n light rainfall, we face Sun | |
| 1550. |
The colour of the ocean appears to be blue because the sunlight falling on it is |
| A. | eflected |
| B. | efracted |
| C. | iffracted |
| D. | cattered |
| Answer» E. | |