MCQOPTIONS
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MCQOPTIONS
This section includes 488 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 301. |
Total momentum within a closed system is |
| A. | increasing |
| B. | decreasing |
| C. | zero |
| D. | constant |
| Answer» E. | |
| 302. |
Ranges of waves which overlap are |
| A. | x-rays and gamma rays |
| B. | x-rays and infrared rays |
| C. | gamma rays and infrared rays |
| D. | UV rays and infrared rays |
| Answer» B. x-rays and infrared rays | |
| 303. |
At absolute zero, volume of gas is equal to |
| A. | 0 m3 |
| B. | 1 m3 |
| C. | 2 m3 |
| D. | 3 m3 |
| Answer» B. 1 m3 | |
| 304. |
Dimensions of Young's modulus are {{}} |
| A. | [M]-1[L]-1[T]-2 |
| B. | [M]-1[L]-2[T]-2 |
| C. | [M] [L]-2[T]-2 |
| D. | [M] [L]-1[T]-2 |
| Answer» E. | |
| 305. |
Ratio of voltages is equal to ratio of |
| A. | iron sheets in core |
| B. | coil |
| C. | number of turns in coil |
| D. | all of above |
| Answer» D. all of above | |
| 306. |
Amount by which one oscillation leads or lags behind another is called |
| A. | in phase |
| B. | intensity |
| C. | phase difference |
| D. | superposition |
| Answer» D. superposition | |
| 307. |
Incorrect statement for co-efficient of friction could be that |
| A. | The coefficient of friction is denoted by the Greek letter . |
| B. | The coefficient of friction is directly proportional to the force of friction |
| C. | The coefficient of friction is constant even in the conditions of fast slipping and high contact pressure |
| D. | The coefficient of friction is inversely proportional to the force pressing the surfaces together |
| Answer» D. The coefficient of friction is inversely proportional to the force pressing the surfaces together | |
| 308. |
Wave speed is directly proportional to |
| A. | frequency |
| B. | amplitude |
| C. | wavelength |
| D. | energy |
| Answer» D. energy | |
| 309. |
If an object moves a circular distance s of radius r , then it's angular displacement is {{}} |
| A. | s r |
| B. | r s |
| C. | rs |
| D. | r2s |
| Answer» B. r s | |
| 310. |
Minimum energy required to pull nucleus apart is called |
| A. | ionization energy |
| B. | electron affinity |
| C. | chemical energy |
| D. | binding energy |
| Answer» E. | |
| 311. |
Energy given to nucleus to dismantle it increases the |
| A. | kinetic energy of individual nucleons |
| B. | mechanical energy of individual nucleons |
| C. | potential energy of individual nucleons |
| D. | chemical energy of individual nucleons |
| Answer» D. chemical energy of individual nucleons | |
| 312. |
Loss of energy of an electron results in |
| A. | absorption of photon |
| B. | emission of photon |
| C. | destruction of photon |
| D. | formation of photon |
| Answer» C. destruction of photon | |
| 313. |
Type of rays that affect the nucleus are |
| A. | alpha |
| B. | beta |
| C. | gamma |
| D. | EM |
| Answer» B. beta | |
| 314. |
Energy absorbed by electron is used in |
| A. | escaping the metal |
| B. | increasing kinetic energy |
| C. | both A and B |
| D. | increasing frequency |
| Answer» D. increasing frequency | |
| 315. |
Field which does not have magnetic poles is |
| A. | straight lined |
| B. | normal to the wire |
| C. | tangent to the wire |
| D. | circular |
| Answer» E. | |
| 316. |
Electrons move around nucleus in form of |
| A. | clouds |
| B. | dust particles |
| C. | steam |
| D. | charge |
| Answer» B. dust particles | |
| 317. |
If nucleus is formed from separate nucleons, then energy is |
| A. | gained |
| B. | released |
| C. | converted |
| D. | absorbed |
| Answer» C. converted | |
| 318. |
Radius of nucleus ranges from {{}} |
| A. | 10-15 m |
| B. | 10-15 m to 10-14 m |
| C. | 10-10 m |
| D. | 10-10 m to 10-6 m |
| Answer» C. 10-10 m | |
| 319. |
Energy object possesses due to it's position is called |
| A. | kinetic energy |
| B. | mechanical energy |
| C. | potential energy |
| D. | chemical energy |
| Answer» D. chemical energy | |
| 320. |
Angle through which an object has moved is called it's |
| A. | linear displacement |
| B. | linear distance |
| C. | angular displacement |
| D. | angular distance |
| Answer» D. angular distance | |
| 321. |
If time period of an oscillation is 0.40 s, then it's frequency is |
| A. | 2 Hz |
| B. | 2.5 Hz |
| C. | 3 Hz |
| D. | 3.5 Hz |
| Answer» C. 3 Hz | |
| 322. |
During one oscillation, phase of oscillation changes by |
| A. | rad |
| B. | 2 rad |
| C. | 2 rad |
| D. | 4 rad |
| Answer» D. 4 rad | |
| 323. |
Frequency and time period are |
| A. | directly related |
| B. | not related |
| C. | inversely related |
| D. | directly proportional |
| Answer» D. directly proportional | |
| 324. |
Component which obeys ohm's law is called |
| A. | resistive component |
| B. | efficient component |
| C. | Ohmic component |
| D. | non-Ohmic component |
| Answer» D. non-Ohmic component | |
| 325. |
Number of satellites in geostationary orbits are |
| A. | 100 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» D. 400 | |
| 326. |
In semiconductors upon increasing temperature, conductivity |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | haphazard |
| Answer» C. remains constant | |
| 327. |
Energy of an electron in an atom is |
| A. | quantized |
| B. | continuous |
| C. | radial |
| D. | randomized |
| Answer» B. continuous | |
| 328. |
Dimensions of gravitational constant G are: {{}} |
| A. | [M]-1[L]3[T]-2 |
| B. | [M] [L]3[T]-2 |
| C. | [M]-1[L]2[T]-1 |
| D. | [M] [L]-1[T]2 |
| Answer» B. [M] [L]3[T]-2 | |
| 329. |
Geostationary satellite has period |
| A. | twice of Earth |
| B. | same as Earth |
| C. | half of Earth |
| D. | quarter of Earth |
| Answer» C. half of Earth | |
| 330. |
For s.h.m, maximum speed is proportional to |
| A. | wavelength |
| B. | acceleration |
| C. | time |
| D. | frequency |
| Answer» E. | |
| 331. |
If the two quantizes are inversely proportional then graph between y and 1/x gives |
| A. | straight line cutting the axis |
| B. | straight line through origin |
| C. | a parabolic curve |
| D. | a hyperbolic curve |
| Answer» C. a parabolic curve | |
| 332. |
When current is parallel to magnetic fields, force on conductor is |
| A. | zero |
| B. | infinite |
| C. | 2 times |
| D. | same |
| Answer» B. infinite | |
| 333. |
Strength of magnetic field is known as |
| A. | flux |
| B. | density |
| C. | magnetic strength |
| D. | magnetic flux density |
| Answer» E. | |
| 334. |
Two forces which make up Newton's third law can |
| A. | act on same objects |
| B. | act on different objects |
| C. | not act at same time |
| D. | not act oppositely |
| Answer» C. not act at same time | |
| 335. |
Number of protons in an atom determine |
| A. | chemical properties |
| B. | physical properties |
| C. | magnetic properties |
| D. | electrical properties |
| Answer» B. physical properties | |
| 336. |
In NTC thermistor on increasing temperature, the resistance |
| A. | increases |
| B. | remains constant |
| C. | decreases |
| D. | behaves abruptly |
| Answer» D. behaves abruptly | |
| 337. |
First communication satellites used frequencies of |
| A. | 6 GHz for uplink |
| B. | 3 GHz for uplink |
| C. | 6 GHz for downlink |
| D. | 5 GHz for downlink |
| Answer» B. 3 GHz for uplink | |
| 338. |
Work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is |
| A. | 1000 kJ |
| B. | 1300 kJ |
| C. | 1400 kJ |
| D. | 1200 kJ |
| Answer» E. | |
| 339. |
In an insulator, the valence band is |
| A. | fully occupied |
| B. | fully empty |
| C. | half filled |
| D. | half charged |
| Answer» B. fully empty | |
| 340. |
Efficiency of car engine is only about |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | 80% |
| Answer» C. 30% | |
| 341. |
Amount of d.c voltage as compare to Vo is |
| A. | 50% |
| B. | 60% |
| C. | 70% |
| D. | 80% |
| Answer» D. 80% | |
| 342. |
Force per meter on two wires carrying a current of 1 A placed 1 m apart is equal to {{}} |
| A. | 6.7 10 -11 N |
| B. | 9.0 10 9 N |
| C. | 2.0 10 -7 N |
| D. | 3.0 10 -4 N |
| Answer» D. 3.0 10 -4 N | |
| 343. |
Voltage signal generated by a microphone is |
| A. | digital in nature |
| B. | analogue in nature |
| C. | consists of bits and bytes |
| D. | hybrid in nature |
| Answer» C. consists of bits and bytes | |
| 344. |
Work done by force of gravity on a satellite of 500 N at height is |
| A. | 0 J |
| B. | 1 J |
| C. | 2 J |
| D. | 3 J |
| Answer» B. 1 J | |
| 345. |
At threshold voltage, resistance of diode |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | varies depending on the direction of voltage |
| Answer» B. increases | |
| 346. |
Activity is proportional to number of |
| A. | daughter nuclei |
| B. | decayed nuclei |
| C. | undecayed nuclei |
| D. | father nuclei |
| Answer» D. father nuclei | |
| 347. |
Electric and magnetic fields vary at angle of |
| A. | 30 |
| B. | 90 |
| C. | 45 |
| D. | 180 |
| Answer» C. 45 | |
| 348. |
Origin of gravitational field is |
| A. | charges |
| B. | masses |
| C. | Earth's core |
| D. | matter |
| Answer» C. Earth's core | |
| 349. |
Graph of resistance of thermistor to temperature is |
| A. | exponential decrease |
| B. | linear decrease |
| C. | exponential increase |
| D. | linear increase |
| Answer» B. linear decrease | |
| 350. |
Resistivity of lead is {{}} |
| A. | 22.5 10 -8 m |
| B. | 20.8 10 -8 m |
| C. | 10 m |
| D. | 5 m |
| Answer» C. 10 m | |