MCQOPTIONS
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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.
| 301. |
The astronaut who landed or stepped down first on the surface of moon: |
| A. | Neil Armstrong |
| B. | Uri Gagarin |
| C. | Denial Pearl |
| D. | None of these |
| Answer» B. Uri Gagarin | |
| 302. |
At present how many planets are in existence is visible? |
| A. | 9 |
| B. | 8 |
| C. | 7 |
| D. | None of these |
| Answer» C. 7 | |
| 303. |
What portion of the moon is visible from the earth's surface? |
| A. | 0.47 |
| B. | 0.34 |
| C. | 0.21 |
| D. | 0.41 |
| Answer» E. | |
| 304. |
Which one of the following has minimum value of escape velocity on its surface? |
| A. | Moon |
| B. | Earth |
| C. | Mars |
| D. | Mercury |
| Answer» B. Earth | |
| 305. |
Which one of the following planets has the maximum value of escape velocity? |
| A. | |
| B. | |
| C. | |
| D. | |
| Answer» C. | |
| 306. |
The value of escape velocity on the moon's surface is: |
| A. | 3.4 km/sec |
| B. | 4 km/sec |
| C. | 11.2 km/sec |
| D. | 5.6 km/sec |
| Answer» C. 11.2 km/sec | |
| 307. |
The sky appears black from the moon because of : |
| A. | Lack of atmosphere |
| B. | Lack of cloud |
| C. | Lack of oxygen and CO2 |
| D. | None of these |
| Answer» B. Lack of cloud | |
| 308. |
The area of the moon's surface where there is no possibility of the occurrence of water is called: |
| A. | Ocean of storms |
| B. | Areas of storms |
| C. | Any of these |
| D. | None of these |
| Answer» B. Areas of storms | |
| 309. |
Which one of the following is the most elevated place on the moon’s surface? |
| A. | Leibnitz Mountain |
| B. | Dream Mountain |
| C. | Black Mountain |
| D. | None of these |
| Answer» B. Dream Mountain | |
| 310. |
The back part of the moon is always calm and dark which is called: |
| A. | Sea of tranquillity |
| B. | Ocean of storms |
| C. | Both of these |
| D. | None of these |
| Answer» B. Ocean of storms | |
| 311. |
Consider the following statement (s) related to the quantity (vector or a scalar) I.Vectors are quantities that are fully described by a magnitude (or numerical value) alone. II.Scalars are quantities that are fully described by both a magnitude and a direction. Which is/are correct statement (s)? |
| A. | Only I |
| B. | Only II |
| C. | Both I & II |
| D. | Neither I nor II |
| Answer» E. | |
| 312. |
Which of the following is not emitted by radioactive substance? |
| A. | Electrons |
| B. | Electromagnetic radiations |
| C. | Alpha particles |
| D. | Neutrons |
| Answer» E. | |
| 313. |
Which of the following is the correct function of Rectifiers (convertor)? |
| A. | Direct current to Alternating current |
| B. | Alternating current to Direct current |
| C. | High voltage to low voltage |
| D. | Low voltage to high voltage |
| Answer» C. High voltage to low voltage | |
| 314. |
Consider the following statement (s) related to the scalar quantity I.It is a one dimensional measurement of a quantity, like temperature, or weight. II.It is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement. 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 | |
| 315. |
Consider the following statement (s) related to the momentum I.If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same. II.It is the product of the mass and velocity of an object. 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 | |
| 316. |
Which of the following is the correct pair that have not identical dimension of physical quantities? |
| A. | Pressure and Young's modules |
| B. | Planck's constant and Angular momentum |
| C. | Impelling force or strength and moment of force |
| D. | Physical energy or intensity and rate of change of linear momentum |
| Answer» D. Physical energy or intensity and rate of change of linear momentum | |
| 317. |
What will happen to the water when a thin capillary tube is replaced with another insufficient length of tube? |
| A. | will overflow |
| B. | will not rise |
| C. | depressed |
| D. | change its meniscus |
| Answer» C. depressed | |
| 318. |
What make the metals are good conductors of electricity? |
| A. | Because they contain free electrons |
| B. | Because the atoms are lightly packed |
| C. | Because they have high melting point |
| D. | All of the above |
| Answer» B. Because the atoms are lightly packed | |
| 319. |
Why the Planets do not twinkle? |
| A. | Because they emit light of a constant intensity |
| B. | Because their distance from the earth does not change with time |
| C. | Because they are very far away from the earth resulting in decrease in intensity of light |
| D. | Because they are nearer to earth and hence we receive a greater amount of light and, therefore minor variations in the intensity are not noticeable |
| Answer» E. | |
| 320. |
Which of the following is measured in Pa (Pascal)? |
| A. | Thrust |
| B. | Pressure |
| C. | Frequency |
| D. | Conductivity |
| Answer» C. Frequency | |
| 321. |
The carbon strips used to pass electric current to the coil are known: |
| A. | Commutator |
| B. | Magnet |
| C. | Battery |
| D. | Brushes |
| Answer» E. | |
| 322. |
In an electric motor, which device reverses the direction of current through a circuit? |
| A. | Carbon brush |
| B. | Coil |
| C. | Commutator |
| D. | Permanent magnet |
| Answer» E. | |
| 323. |
In which of the following devices is the electrical motor used? |
| A. | Electric fans |
| B. | Washing machine |
| C. | Refrigerator |
| D. | All of the above |
| Answer» E. | |
| 324. |
Which device converts electrical energy into mechanical energy? |
| A. | Motor |
| B. | Generator |
| C. | Windmill |
| D. | Transformer |
| Answer» B. Generator | |
| 325. |
The direction of deflection of a current-carrying conductor indicates the direction of: |
| A. | Electric current |
| B. | Force acting on it |
| C. | Magnetic field |
| D. | All of the above |
| Answer» C. Magnetic field | |
| 326. |
What does the forefinger represent in the Fleming’s left-hand rule? |
| A. | Magnetic field |
| B. | Current |
| C. | Motion of conductor |
| D. | None of the above |
| Answer» B. Current | |
| 327. |
Which direction is indicated by the thumb in Fleming’s left-hand rule? |
| A. | Current |
| B. | Magnetic field |
| C. | Motion of conductor |
| D. | None of the above |
| Answer» D. None of the above | |
| 328. |
Which rule is applied to find the direction of force acting on the current-carrying conductor, if the direction of current and direction of magnetic field is known? |
| A. | Maxwell’s right-hand thumb rule |
| B. | Born rule |
| C. | Hall Effect |
| D. | Fleming’s left-hand rule |
| Answer» E. | |
| 329. |
The maximum force is exerted on a current carrying conductor when it is: |
| A. | Perpendicular to magnetic field |
| B. | Parallel to magnetic field |
| C. | Swings in backward direction |
| D. | All of the above |
| Answer» B. Parallel to magnetic field | |
| 330. |
Who discovered that when a current carrying conductor is placed in a magnetic field, a mechanical force exerted on the conductor makes it move? |
| A. | Hans Christian Oersted |
| B. | Michael Faraday |
| C. | Benjamin Franklin |
| D. | William Gilbert |
| Answer» C. Benjamin Franklin | |
| 331. |
Which are the two main organs of the human body where the magnetic field produced is significant? |
| A. | Heart and kidney |
| B. | Lungs and kidney |
| C. | Heart and brain |
| D. | Liver and stomach |
| Answer» D. Liver and stomach | |
| 332. |
Which effect of current is used in detecting concealed current-carrying conductor in a wall? |
| A. | Magnetic |
| B. | Heating |
| C. | Chemical |
| D. | Ionic |
| Answer» B. Heating | |
| 333. |
Strong permanent magnets are used in: |
| A. | Microphones |
| B. | Loudspeakers |
| C. | Voltmeters |
| D. | All of the above |
| Answer» E. | |
| 334. |
Which of the following factors affects the strength of steel? |
| A. | Number of turns in coil |
| B. | Current flowing in coil |
| C. | Length of air gap between poles |
| D. | All of the above |
| Answer» E. | |
| 335. |
Which of the following is not used for making electromagnets? |
| A. | Carbon steel |
| B. | Alnico |
| C. | Cobalt steel |
| D. | All of the above |
| Answer» E. | |
| 336. |
An electromagnet consists of a long coil of insulated copper wire wound on a soft: |
| A. | Aluminium core |
| B. | Silver core |
| C. | Zinc core |
| D. | Iron core |
| Answer» E. | |
| 337. |
On what does the strength of magnetic field produced by a current carrying solenoid depend? |
| A. | Number of turns in solenoid |
| B. | Strength of current |
| C. | Nature of core material |
| D. | All of the above |
| Answer» E. | |
| 338. |
What is used to make electromagnets? |
| A. | Circular wire |
| B. | Solenoid |
| C. | Straight wire |
| D. | Horse shoe magnet |
| Answer» C. Straight wire | |
| 339. |
The magnetic field lines inside the solenoid are: |
| A. | Concentrated circles |
| B. | Bigger circles |
| C. | Parallel straight lines |
| D. | None of the above |
| Answer» D. None of the above | |
| 340. |
The magnetic field produced by a current carrying solenoid is similar to the magnetic field produced by a: |
| A. | Bar magnet |
| B. | Ring magnet |
| C. | Rod magnet |
| D. | Horse shoe magnet |
| Answer» B. Ring magnet | |
| 341. |
What is a long coil containing a large number of close turns of insulated copper wire called? |
| A. | Straight |
| B. | Solenoid |
| C. | Circular loop |
| D. | Stranded |
| Answer» C. Circular loop | |
| 342. |
The strength of magnetic field produced by a current carrying circular coil can be increased by: |
| A. | Increasing number of turns of wire |
| B. | Increasing current flow |
| C. | Decreasing radius of coil |
| D. | All of the above |
| Answer» E. | |
| 343. |
Which of the following current carrying wires will have strong magnetic field? |
| A. | Straight |
| B. | Circular loop |
| C. | Solenoid |
| D. | All of the above |
| Answer» D. All of the above | |
| 344. |
Maxwell’s right-hand thumb rule is also known as: |
| A. | Biot-Savart law |
| B. | Hall Effect |
| C. | Born rule |
| D. | Corkscrew rule |
| Answer» E. | |
| 345. |
According to Maxwell’s right-hand thumb rule, what gives the direction of magnetic field lines around the wire? |
| A. | Direction of thumb |
| B. | Direction of fingers encircling wire |
| C. | Direction opposite to thumb |
| D. | Direction of index finger |
| Answer» C. Direction opposite to thumb | |
| 346. |
What kind of magnetic field lines will be produced around a straight wire carrying current? |
| A. | Bigger circles |
| B. | Straight |
| C. | Concentrated circles |
| D. | Parallel straight |
| Answer» D. Parallel straight | |
| 347. |
Which of the following utilise magnetic effect of current? |
| A. | Electric motor |
| B. | Telephone |
| C. | Radio |
| D. | All of the above |
| Answer» E. | |
| 348. |
Magnetic effect around a wire is due to: |
| A. | The presence of metal |
| B. | Current flowing in it |
| C. | Circular loop |
| D. | No current in it |
| Answer» C. Circular loop | |
| 349. |
Magnetic effect of current gives rise to which force? |
| A. | Mechanical |
| B. | Friction |
| C. | Spring |
| D. | Gravitational |
| Answer» B. Friction | |
| 350. |
Who discovered the magnetic field of current? |
| A. | William Gilbert |
| B. | Hans Christian Oersted |
| C. | Benjamin Franklin |
| D. | Charles Augustin de Coulomb |
| Answer» C. Benjamin Franklin | |