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MCQOPTIONS
This section includes 312 Mcqs, each offering curated multiple-choice questions to sharpen your Banking And Financial Awareness knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
In the figure below is shown the flow of the liquid through a horizontal pipe. Three tubes A, B and C are connected to the pipe. The radii of the tubes A, B and C at the junction are respectively 2 cm, 1 cm and 2 cms. It can be said that |
| A. | the height of the liquid in the tube A is maximum |
| B. | height of the liquid in the tube A and tube B is the same |
| C. | height of the liquid in all the three tubes is the same |
| D. | height of the liquid in tube A and C is the same |
| Answer» E. | |
| 252. |
The lift in an aeroplane is based on |
| A. | Law of gravitation |
| B. | Theorem of continuity |
| C. | Pascal's low |
| D. | Bernoulli's theorem |
| Answer» E. | |
| 253. |
If the force on the surface is doubled and area is reduced to half, pressure will |
| A. | become 2 times |
| B. | become 3 times |
| C. | become 4 times |
| D. | remain unchanged |
| Answer» D. remain unchanged | |
| 254. |
Kerosene oil rises up in a wick of a lantern because of |
| A. | diffusion of the oil through the wick |
| B. | surface tension |
| C. | buoyant force of air |
| D. | the gravitational pull of the wick |
| Answer» C. buoyant force of air | |
| 255. |
Two pieces of metal when immersed in a liquid have equal up thrust on them; then |
| A. | both pieces must have equal weights |
| B. | both pieces must have equal densities |
| C. | both pieces must have equal volumes |
| D. | both are floating to the same depth |
| Answer» D. both are floating to the same depth | |
| 256. |
A container partly filled in a liquid is suspended from a spring balance. A small body is gently dropped in the container. The pointer of spring balance will |
| A. | read less |
| B. | oscillate |
| C. | read the same |
| D. | read more |
| Answer» E. | |
| 257. |
Liquid pressure at a point in a liquid does not depend on the |
| A. | density of liquid |
| B. | shape of the vessel in which the liquid is kept |
| C. | depth of the point from the surface |
| D. | acceleration due to gravity |
| Answer» C. depth of the point from the surface | |
| 258. |
According to Hooke's law of elasticity, if stress is increased, then the ratio of stress to strain |
| A. | becomes zero |
| B. | remains constant |
| C. | decreases |
| D. | increases |
| Answer» C. decreases | |
| 259. |
A body floats in a liquid containing in a beaker. The whole system as shown in Fig. is falling under gravity. The un thrust on the body due to liquid is |
| A. | zero |
| B. | equal to weight of body in air |
| C. | equal to weight of liquid displaced |
| D. | equal to weight of immersed part of the body |
| Answer» B. equal to weight of body in air | |
| 260. |
In solids, interatomic forces are |
| A. | totally repulsive |
| B. | totally attractive |
| C. | combination of [a] and [b] |
| D. | None of these |
| Answer» D. None of these | |
| 261. |
A man is sitting in a boat which is floating in pond. If the man drinks some water from the pond, the level of water in the pond will |
| A. | rise a little |
| B. | fall a little |
| C. | remain stationary |
| D. | None of these |
| Answer» D. None of these | |
| 262. |
Human ears can sense sound waves travel ling in air having wavelength of |
| A. | \[{{10}^{-3}}m\] |
| B. | \[{{10}^{-2}}m\] |
| C. | 1m |
| D. | \[{{10}^{2}}m\] |
| Answer» D. \[{{10}^{2}}m\] | |
| 263. |
Which of the following is carried by the waves from one place to another? |
| A. | Mass |
| B. | Velocity |
| C. | Wavelength |
| D. | Energy |
| Answer» E. | |
| 264. |
A thunder clap is heard 5.5 second after the lightening flash. The distance of the flash is (velocity of sound in air =330 m/s) |
| A. | 1780m |
| B. | 1815m |
| C. | 300m |
| D. | 3560m |
| Answer» C. 300m | |
| 265. |
A hollow sphere is filled with water. It is hung by a long thread. As the water flows out of a hole at the bottom, the period of oscillation will |
| A. | first increase and then decrease |
| B. | first decrease and then increase |
| C. | go on increasing |
| D. | go on decreasing |
| Answer» B. first decrease and then increase | |
| 266. |
Resonance is an example of |
| A. | tuning fork |
| B. | forced vibration |
| C. | free vibration |
| D. | damped vibration |
| Answer» C. free vibration | |
| 267. |
When a sound wave goes from one medium to another, the quantity that remains unchanged is |
| A. | frequency |
| B. | amplitude |
| C. | wavelength |
| D. | speed |
| Answer» B. amplitude | |
| 268. |
Echo is a type of |
| A. | reflected sound |
| B. | refracted sound |
| C. | neither reflected sound nor refracted sound |
| D. | None of these |
| Answer» B. refracted sound | |
| 269. |
Which of the following is used to find the depth of sea? |
| A. | RADAR |
| B. | SONAR |
| C. | ECHO |
| D. | None of these |
| Answer» C. ECHO | |
| 270. |
What is the effect of humidity on sound waves when humidity increases? |
| A. | Speed of sound waves is more |
| B. | Speed of sound waves is less |
| C. | Speed of sound waves remains same |
| D. | Speed of sound waves becomes zero |
| Answer» B. Speed of sound waves is less | |
| 271. |
Application of a forward bias to a p-n junction |
| A. | widens the depletion zone. |
| B. | increases the potential difference across the depletion zone. |
| C. | increases the number of donors on the n side. |
| D. | increases the electric field in the depletion zone. |
| Answer» D. increases the electric field in the depletion zone. | |
| 272. |
The Donor level in a semiconductor is placed |
| A. | half-way in the forbidden energy gap |
| B. | in the forbidden energy gap close to the upper edge of the valence band |
| C. | in the conduction band close to the lower edge to the conduction band |
| D. | in the forbidden energy gap close to the lower edge of the conduction band |
| Answer» E. | |
| 273. |
Reverse bias applied to a junction diode |
| A. | increases the minority carrier current |
| B. | lowers the potential barrier |
| C. | raises the potential barrier |
| D. | increases the majority carrier current |
| Answer» D. increases the majority carrier current | |
| 274. |
In semiconductors, at room temperature |
| A. | the conduction band is completely empty |
| B. | the valence band is partially empty and the conduction band is partially filled |
| C. | the valence band is completely filled and the conduction band is partially filled |
| D. | the valence band is completely filled |
| Answer» D. the valence band is completely filled | |
| 275. |
p-n junction is said to be forward biased, when |
| A. | the positive pole of the battery is joined to the p-semiconductor and negative pole to the n-semiconductor |
| B. | the positive pole of the battery is joined to the n-semiconductor and p-semiconductor |
| C. | the positive pole of the battery is connected to n- semiconductor and/?- semiconductor |
| D. | a mechanical force is applied in the forward direction |
| Answer» B. the positive pole of the battery is joined to the n-semiconductor and p-semiconductor | |
| 276. |
When n-type semiconductor is heated |
| A. | number of electrons increases while that of holes decreases |
| B. | number of holes increases while that of electrons decreases |
| C. | number of electrons and holes remain same |
| D. | number of electrons and holes increases equally |
| Answer» E. | |
| 277. |
At absolute zero, Si acts as |
| A. | non-metal |
| B. | metal |
| C. | insulator |
| D. | None of these |
| Answer» D. None of these | |
| 278. |
Zener breakdown takes place if |
| A. | doped impurity is low |
| B. | doped impurity is high |
| C. | less impurity in n-part |
| D. | less impurity in p-part |
| Answer» C. less impurity in n-part | |
| 279. |
Function of rectifier is |
| A. | to convert A. C. into D.C. |
| B. | to convert D.C. into A.C. |
| C. | Both [a] and [b] |
| D. | None of these |
| Answer» B. to convert D.C. into A.C. | |
| 280. |
The forbidden gap in the energy bands of germanium at room temperature is about |
| A. | 1.1 eV |
| B. | 0.1 eV |
| C. | 0.67 eV |
| D. | 6.7 eV |
| Answer» D. 6.7 eV | |
| 281. |
When a semiconductor is heated, its resistance |
| A. | decreases |
| B. | increases |
| C. | remains unchanged |
| D. | either [b] or [c] |
| Answer» B. increases | |
| 282. |
In extrinsic semiconductors |
| A. | the conduction band and valence band overlap |
| B. | the gap between conduction band and valence band is more than 16eV |
| C. | the gap between conduction band and valence band is near about 1 eV |
| D. | the gap between conduction band and valence band will be 100 eV and more |
| Answer» D. the gap between conduction band and valence band will be 100 eV and more | |
| 283. |
In a semiconductor, the concentration of electrons is \[8\times {{10}^{14}}/c{{m}^{3}}\]and that of the holes is \[5\times {{10}^{12}}/c{{m}^{3}}\]. The semiconductor is |
| A. | p-type |
| B. | n-type |
| C. | intrinsic |
| D. | Cannot say |
| Answer» C. intrinsic | |
| 284. |
In an unbiased p-n junction, holes diffuse from the p-region to n-region because |
| A. | free electrons in the n-region attract them. |
| B. | they move across the junction by the potential difference. |
| C. | hole concentration in p-region is more as compared to p-region. |
| D. | all the above |
| Answer» D. all the above | |
| 285. |
Barrier potential of a p-n junction diode does not depend on |
| A. | doping density |
| B. | diode design |
| C. | temperature |
| D. | forward bias |
| Answer» C. temperature | |
| 286. |
Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to \[{{({{E}_{g}})}_{c}},{{({{E}_{g}})}_{si}}\] and \[{{({{E}_{g}})}_{Ge}}\]. Which of the following statements is true? |
| A. | \[{{({{E}_{g}})}_{Si}}<{{({{E}_{g}})}_{Ge}}<{{({{E}_{g}})}_{C}}\] |
| B. | \[{{({{E}_{g}})}_{C}}<{{({{E}_{g}})}_{Ge}}<{{({{E}_{g}})}_{Si}}\] |
| C. | \[{{({{E}_{g}})}_{C}}>{{({{E}_{g}})}_{Si}}>{{({{E}_{g}})}_{Ge}}\] |
| D. | \[{{({{E}_{g}})}_{C}}={{({{E}_{g}})}_{Si}}={{({{E}_{g}})}_{Ge}}\] |
| Answer» D. \[{{({{E}_{g}})}_{C}}={{({{E}_{g}})}_{Si}}={{({{E}_{g}})}_{Ge}}\] | |
| 287. |
If the distance between the conduction band and valence band is 1 eV. This combination is |
| A. | semiconductor |
| B. | conductor |
| C. | metal |
| D. | insulator |
| Answer» B. conductor | |
| 288. |
In a p-n junction |
| A. | the potential of p & n sides becomes higher alternately |
| B. | the p side is at higher electrical potential than n side |
| C. | the n side is at higher electric potential than p side |
| D. | both p & n sides are at same potential |
| Answer» C. the n side is at higher electric potential than p side | |
| 289. |
When the S-pole of a magnet is placed near an unknown pole of another magnet, the two magnets |
| A. | repel each other because the unknown pole is N-pole |
| B. | repel each other because the unknown pole is S-pole |
| C. | attract each other because the unknown pole is S-pole |
| D. | can either attract or repel |
| Answer» C. attract each other because the unknown pole is S-pole | |
| 290. |
When an iron bar is moved over a bar magnet along its length the attractive force |
| A. | increases first and then decreases |
| B. | decreases first and then increases |
| C. | remains same |
| D. | cannot say |
| Answer» C. remains same | |
| 291. |
Two magnets A and B are placed with like poles having one above another. What will happen? |
| A. | A will stuck to B |
| B. | A will remain as in figure |
| C. | A will move side ways |
| D. | Can't say |
| Answer» C. A will move side ways | |
| 292. |
The distance between two magnetic poles is doubled and their pole-strength is also doubled. The force between them |
| A. | increases to four times |
| B. | decreases by half |
| C. | remains unchanged |
| D. | increases to two times |
| Answer» C. remains unchanged | |
| 293. |
Which of the following is an artificial magnet? |
| A. | Bar magnet |
| B. | Horse-shoe magnet |
| C. | Magnetic needle |
| D. | All of the above |
| Answer» E. | |
| 294. |
Earth's magnetic field always has a horizontal component except at |
| A. | magnetic equator |
| B. | magnetic pole |
| C. | geographical north pole |
| D. | at an altitude of \[45{}^\circ \] |
| Answer» C. geographical north pole | |
| 295. |
Rainbow is caused due to |
| A. | reflection of sun light from air particles |
| B. | dispersion of sun light from water drops |
| C. | interference of light |
| D. | diffraction of sun rays from water drops |
| Answer» C. interference of light | |
| 296. |
The human eye forms the image of an object at its |
| A. | cornea |
| B. | iris |
| C. | pupil |
| D. | retina |
| Answer» E. | |
| 297. |
Which of the following parts of eye protects the eye and gives it shape? |
| A. | Choroid |
| B. | Sclera |
| C. | Yellow spot |
| D. | Cleary muscles |
| Answer» C. Yellow spot | |
| 298. |
Magnification produced by a rear view mirror fitted in vehicles |
| A. | is less than one |
| B. | is more than one |
| C. | is equal to one |
| D. | can be more than or less than one depending upon the position of the object in front of it |
| Answer» B. is more than one | |
| 299. |
Rear-view mirror used in a vehicle is a |
| A. | concave mirror |
| B. | convex mirror |
| C. | plane mirror |
| D. | None of these |
| Answer» C. plane mirror | |
| 300. |
The least distance of distinct vision of a normal eye of an adult is |
| A. | 25m |
| B. | 25cm |
| C. | 25 mm |
| D. | None of these |
| Answer» C. 25 mm | |