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.
| 1701. |
In a progressive wave, what is the phase difference (in degrees) between two points whose phases are opposite? |
| A. | 360 |
| B. | 270 |
| C. | 180 |
| D. | 90 |
| Answer» D. 90 | |
| 1702. |
An instrument for measuring the speed of wind is |
| A. | Odometer |
| B. | Speedometer |
| C. | Anemometer |
| D. | Barometer |
| Answer» D. Barometer | |
| 1703. |
-40 degrees Fahrenheit is equal to how many degrees on the Celsius scale? |
| A. | + 40 |
| B. | – 32 |
| C. | – 40 |
| D. | 0 |
| Answer» D. 0 | |
| 1704. |
AC is converted into DC by a ________.A. CondenserB. RectifierC. AmplifierD. Filter |
| A. | C |
| B. | B |
| C. | D |
| D. | A |
| Answer» C. D | |
| 1705. |
Can friction be eliminated entirely by polishing surfaces or by using lots of lubricants? |
| A. | Polishing makes friction nil and increases the moving object's velocity enormously |
| B. | Friction occurs that is almost negligible |
| C. | Friction cannot be totally eliminated as there will be some irregularities |
| D. | Friction can be made zero by polishing |
| Answer» D. Friction can be made zero by polishing | |
| 1706. |
A source of 6 V maintains a current of 0.5 A in a resistor. The power supplied by the source to the source to the resistor will be ______. |
| A. | 0.5 W |
| B. | 3.0 W |
| C. | 1.0 W |
| D. | 1.5 W |
| Answer» C. 1.0 W | |
| 1707. |
In a hydrogen atom, an electron moves in an orbit of radius 5.0 × 10-11 m with a speed of 2.2 × 106 m/s. What is the equivalent current? |
| A. | 0.112 mA |
| B. | 112 mA |
| C. | 1.12 mA |
| D. | 11.2 mA |
| Answer» D. 11.2 mA | |
| 1708. |
During the occurrence of thunder and lightning: |
| A. | lightning is seen before thunder is heard |
| B. | whether lightning is seen first or thunder is heard first will depend upon the distance and angle of the clouds vis-a-vis earth |
| C. | thunder is heard before lightning is seen |
| D. | lightning is seen at the same time as thunder is heard |
| Answer» B. whether lightning is seen first or thunder is heard first will depend upon the distance and angle of the clouds vis-a-vis earth | |
| 1709. |
A ‘γ’ – ray photon produces an electron-positron pair each having KE of 0.01 MeV. The energy of ‘γ’ – ray photon is |
| A. | 1.02 MeV |
| B. | 1.04 MeV |
| C. | 1.03 MeV |
| D. | 2.08 MeV |
| Answer» B. 1.04 MeV | |
| 1710. |
In the equation of motion v = u + at, u represents _______. |
| A. | Initial velocity |
| B. | Final velocity |
| C. | Kinetic energy |
| D. | Potential energy |
| Answer» B. Final velocity | |
| 1711. |
Newton used the phrase 'quantity of motion' for _________ |
| A. | momentum |
| B. | force |
| C. | speed |
| D. | mass |
| Answer» B. force | |
| 1712. |
Keeping voltage constant, if more lamps are put into a series circuit, the overall current in the circuit:A. IncreasesB. DecreasesC. Remains the sameD. Becomes infinite |
| A. | C |
| B. | B |
| C. | A |
| D. | D |
| Answer» C. A | |
| 1713. |
By which of the following strategy meaningful clarification on the concept of reflection of light can be given? |
| A. | Animated video on the concept |
| B. | Chart showing the reflection of light. |
| C. | Observing reflection of light on white paper screen by the learners and drawing conclusions. |
| D. | Asking closed ended questions related to the concept. |
| Answer» D. Asking closed ended questions related to the concept. | |
| 1714. |
How long does it take for the sun's rays to reach the earth? |
| A. | 5 Minutes |
| B. | 6 Minutes |
| C. | 8 Minutes |
| D. | 9 Minutes |
| Answer» D. 9 Minutes | |
| 1715. |
In science, a push or a pull on an object is called as ________. |
| A. | Pressure |
| B. | Gravitation |
| C. | Force |
| D. | Friction |
| Answer» D. Friction | |
| 1716. |
Assertion A): Light Emitting Diode (LED) lamps offer longer service life as compared to Compact Fluorescent Lamps (CFL).Reason R): Light Emitting Diodes (LED) lamps are more energy-efficient as compared to the Compact Fluorescent Lamps (CFL):Select the correct answer using the codes given below: |
| A. | Both A and R are true and R explains A |
| B. | Both A and R are true but R does not explains A |
| C. | A is true and R is false |
| D. | A is false and R is true |
| Answer» B. Both A and R are true but R does not explains A | |
| 1717. |
Anything kept in a fluid experiences an upward force called ___________. |
| A. | Torque |
| B. | Moment |
| C. | Pressure |
| D. | Upthrust |
| Answer» E. | |
| 1718. |
Frictional force acts __________. |
| A. | Against the direction of the force |
| B. | At any angle to the direction of the force |
| C. | In the direction of the force |
| D. | Perpendicular to the direction of the force |
| Answer» B. At any angle to the direction of the force | |
| 1719. |
1 nm is equivalent to |
| A. | 10 Å |
| B. | 100 Å |
| C. | 10 μm |
| D. | .01 mm |
| Answer» B. 100 Å | |
| 1720. |
During the free fall of an object, which of the following energies increases at any point in its path? |
| A. | Mechanical energy |
| B. | Chemical energy |
| C. | Potential energy |
| D. | Kinetic energy |
| Answer» E. | |
| 1721. |
How will the light rays passing from air into a glass prism bend? |
| A. | Almost at 90 degrees with normal |
| B. | Away from the normal |
| C. | Towards the normal |
| D. | As the normal |
| Answer» D. As the normal | |
| 1722. |
1no + 235U92 → yCs55 + 90Rb37 + 21no. Find 'y' from the given fission equation of an uranium nucleus? |
| A. | 142 |
| B. | 143 |
| C. | 144 |
| D. | 145 |
| Answer» D. 145 | |
| 1723. |
In which of the following is permanent magnet NOT used? |
| A. | Microphone |
| B. | Electric iron |
| C. | Loudspeaker |
| D. | Electric generator |
| Answer» C. Loudspeaker | |
| 1724. |
Out of the following, which one is least commonly emitted by radioactive substance? |
| A. | Electrons |
| B. | Electromagnetic radiations |
| C. | Alpha particles |
| D. | Neutrons |
| Answer» E. | |
| 1725. |
Atmospheric humidity is measured by - |
| A. | Photometer |
| B. | Hygrometer |
| C. | Potometer |
| D. | None of these |
| Answer» C. Potometer | |
| 1726. |
Find the resistance (in mega Ω) of a wire of length 8 m, cross sectional area 2 cm2 and made of a material of resistivity 120 Ω m. |
| A. | 1920 |
| B. | 4.8 |
| C. | 2.4 |
| D. | 960 |
| Answer» C. 2.4 | |
| 1727. |
If the resistance of a conductor is reduced to half its initial value, then the heating effect in the conductor will become _______. |
| A. | One-fourth |
| B. | Half |
| C. | Double |
| D. | Four-times |
| Answer» C. Double | |
| 1728. |
In a sound wave compressions are regions where density _____. |
| A. | as well as pressure is high. |
| B. | as well as pressure is low. |
| C. | is high and pressure is low |
| D. | is low and pressure is high |
| Answer» B. as well as pressure is low. | |
| 1729. |
An object is released from a certain height above the ground. Just at the time it touches the ground, it will possess ______. |
| A. | heat energy |
| B. | chemical energy |
| C. | kinetic energy |
| D. | potential energy |
| Answer» D. potential energy | |
| 1730. |
In which of the following devices, a gyroscope is used?A. Computer keyboardB. Computer mouseC. TelephoneD. Television |
| A. | D |
| B. | C |
| C. | B |
| D. | A |
| Answer» D. A | |
| 1731. |
If an agent does a work W in time t, then power is given by: |
| A. | Time/work |
| B. | Time × work |
| C. | Time - work |
| D. | Work/time |
| Answer» E. | |
| 1732. |
If four 1 Ω resistors are connected in series, what is the resultant resistance? |
| A. | 1 Ω |
| B. | 4 Ω |
| C. | 8 Ω |
| D. | 1/4 Ω |
| Answer» C. 8 Ω | |
| 1733. |
During the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in _________. |
| A. | Kinetic energy |
| B. | Work done |
| C. | Heat energy |
| D. | Gravitational force |
| Answer» B. Work done | |
| 1734. |
Physical quantities having both magnitude and direction are called ________. |
| A. | Scalar quantities |
| B. | Mixed quantities |
| C. | Vector quantities |
| D. | Matrix quantities |
| Answer» D. Matrix quantities | |
| 1735. |
An incident ray strikes a plane mirror at an angle of 20° with the mirror. The angle between the incident ray and the reflected ray is ________. |
| A. | 50° |
| B. | 140° |
| C. | 40° |
| D. | 20° |
| Answer» C. 40° | |
| 1736. |
As an object falls freely its________ . |
| A. | Kinetic energy gets converted into potential energy |
| B. | Potential energy gets converted into kinetic energy |
| C. | Momentum gets converted into gravitational force |
| D. | Gravitational force gets converted into momentum |
| Answer» C. Momentum gets converted into gravitational force | |
| 1737. |
Find the resistance (in mega Ω) of a wire of length 10 m, cross sectional area 1 cm2 and made of a material of resistivity 100 Ωm. |
| A. | 1000 |
| B. | 20 |
| C. | 500 |
| D. | 10 |
| Answer» E. | |
| 1738. |
If a scientist reads an ambient temperature 273 K in the laboratory, what will a doctor's thermometer read it? |
| A. | 0 degree Celsius |
| B. | 32 degrees Celsius |
| C. | 99 degrees Celsius |
| D. | - 100 degrees Celsius |
| Answer» B. 32 degrees Celsius | |
| 1739. |
A ball is thrown vertically upward with a velocity of 20 m/s. After 3s, the magnitude of its displacement is (take g = 10 m/s2) |
| A. | 15 m |
| B. | 25 m |
| C. | 10 m |
| D. | 20 m |
| Answer» B. 25 m | |
| 1740. |
A person stands on his two feet over a surface and experiences a pressure P. Now the person stands on only one foot in this case he would experience a pressure of magnitude |
| A. | 4P |
| B. | P |
| C. | ½ P |
| D. | 2P |
| Answer» E. | |
| 1741. |
An object of mass 14 kg is placed at a certain height from the ground. If the potential energy of the object is 560 J, then find the height of the object with reference to the ground. (take g = 10 ms-2) |
| A. | 3 m |
| B. | 4 m |
| C. | 4.5 m |
| D. | 5 m |
| Answer» C. 4.5 m | |
| 1742. |
A free fall in true sense occurs only ______. |
| A. | In the sea |
| B. | In the atmosphere |
| C. | In air |
| D. | In vacuum |
| Answer» E. | |
| 1743. |
An echo will be heard if the minimum distance between the source of the sound and the obstacle is ________. |
| A. | 1 m |
| B. | 10 m |
| C. | 15 m |
| D. | 17 m |
| Answer» E. | |
| 1744. |
For an object, the state of rest is considered to be the state of ________ speed. |
| A. | increasing |
| B. | decreasing |
| C. | inverse |
| D. | zero |
| Answer» E. | |
| 1745. |
Kinetic energy of gas molecules is directly proportional to- |
| A. | Atmospheric pressure |
| B. | Pressure |
| C. | Both temperature and pressure |
| D. | Temperature |
| Answer» E. | |
| 1746. |
An ultrasonic sound wave has a frequency higher than: |
| A. | 20 Hz |
| B. | 200 Hz |
| C. | 20000 Hz |
| D. | 2000 Hz |
| Answer» D. 2000 Hz | |
| 1747. |
Nucleus of 233U92 emits which particles to give nucleus of 225Ra88? |
| A. | 2β |
| B. | 2α |
| C. | 2α, 2β |
| D. | 1α, 2β |
| Answer» C. 2α, 2β | |
| 1748. |
Electric wires are generally coated with: |
| A. | Polypropylene |
| B. | Polyvinyl chloride |
| C. | Polyurethane |
| D. | Polyethylene |
| Answer» C. Polyurethane | |
| 1749. |
Image formed by Plane Mirror is always ________. |
| A. | Virtual and Erect |
| B. | Real and Inverted |
| C. | Real and Erect |
| D. | Virtual and Inverted |
| Answer» B. Real and Inverted | |
| 1750. |
Materials which allow electricity to pass through them are ________ of electricity. |
| A. | Insulators |
| B. | Conductors |
| C. | Dispersion |
| D. | Refraction |
| Answer» C. Dispersion | |