MCQOPTIONS
Saved Bookmarks
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.
| 401. |
Force due to magnetic field and velocity is |
| A. | at right angles to each other |
| B. | at acute angles with each other |
| C. | at obtuse angle with each other |
| D. | antiparallel to each other |
| Answer» B. at acute angles with each other | |
| 402. |
Mass of alpha particle is |
| A. | 50 times the mass of electron |
| B. | 100 times the mass of electron |
| C. | 500 times the mass of electron |
| D. | 1000 times the mass of electron |
| Answer» E. | |
| 403. |
In a nuclear process, the quantity conserved is |
| A. | mass-energy |
| B. | momentum |
| C. | mass only |
| D. | energy only |
| Answer» B. momentum | |
| 404. |
According to the equation r =(mv) (Be) , the faster moving particles |
| A. | move in smaller circle |
| B. | move straight |
| C. | move in bigger circle |
| D. | move randomly |
| Answer» D. move randomly | |
| 405. |
angular frequency of s.h.m is equal to |
| A. | 2 |
| B. | 2 f |
| C. | 2f |
| D. | 1 T |
| Answer» C. 2f | |
| 406. |
For the minute hand of the clock, the angular velocity is equal to {{}} |
| A. | 2 rad s-1 |
| B. | 3 rad s-1 |
| C. | 1 rad s-1 |
| D. | 0.00175 rad s-1 |
| Answer» E. | |
| 407. |
Rate of falling object in vacuum is |
| A. | independent of weight |
| B. | dependent on mass |
| C. | independent of mass |
| D. | dependent of weight |
| Answer» D. dependent of weight | |
| 408. |
Hall probe is made up of |
| A. | metals |
| B. | non metals |
| C. | semiconductor |
| D. | radioactive material |
| Answer» D. radioactive material | |
| 409. |
Molar gas constant has value {{}} |
| A. | 7 J mol -1 K-1 |
| B. | 8 J mol -1 K-1 |
| C. | 8.31 J mol -1 K-1 |
| D. | 5 J mol -1 K-1 |
| Answer» D. 5 J mol -1 K-1 | |
| 410. |
Extra distance travelled by one of waves compared with other is called |
| A. | path |
| B. | displacement |
| C. | phase difference |
| D. | path difference |
| Answer» E. | |
| 411. |
In order to find the internal structure of nucleus, electrons should be accelerated by voltages up to |
| A. | 105 V |
| B. | 107 V |
| C. | 109 V |
| D. | 1011 V |
| Answer» D. 1011 V | |
| 412. |
Energy transferred to stone of weight 10 N falling from top of 250 m high cliff is |
| A. | 25000 J |
| B. | 250000 J |
| C. | 2500 J |
| D. | 250 J |
| Answer» D. 250 J | |
| 413. |
Waves associated with electrons are referred to as |
| A. | plasma waves |
| B. | UV waves |
| C. | gamma rays |
| D. | matter waves |
| Answer» E. | |
| 414. |
Force on a moving charge in a uniform magnetic field depends upon |
| A. | magnetic flux density |
| B. | the charge on the particle |
| C. | the speed of particle |
| D. | all of above |
| Answer» E. | |
| 415. |
"Upthrust = Weight of the liquid displaced" is known as |
| A. | Bernoulli's Principle |
| B. | Archimedes' Principle |
| C. | Pascal's Law |
| D. | Coulomb's law |
| Answer» C. Pascal's Law | |
| 416. |
New nucleus after alpha particle decays, is called |
| A. | parent nucleus |
| B. | daughter nucleus |
| C. | decayed nucleus |
| D. | undecayed nucleus |
| Answer» C. decayed nucleus | |
| 417. |
Particle which explains about mass of matter is called |
| A. | Higgs boson |
| B. | protons |
| C. | leptons |
| D. | neutrons |
| Answer» B. protons | |
| 418. |
Particles that are un affected by strong nuclear force are |
| A. | protons |
| B. | leptons |
| C. | neutrons |
| D. | bosons |
| Answer» C. neutrons | |
| 419. |
If average kinetic energy of molecules is higher, then temperature of gas is |
| A. | high |
| B. | low |
| C. | zero |
| D. | infinite |
| Answer» B. low | |
| 420. |
Torricelli's theorem states that the velocity v of the liquid emerging from the bottom of the wide tank is given by (2gh). In practice, this velocity is: |
| A. | equal to (2gh |
| B. | greater than (2gh |
| C. | lesser than (2gh |
| D. | independent of height and gravitational field strength |
| Answer» D. independent of height and gravitational field strength | |
| 421. |
Angular frequency of precision is called |
| A. | Lower frequency |
| B. | higher frequency |
| C. | Larmor frequency |
| D. | linear frequency |
| Answer» D. linear frequency | |
| 422. |
Space occupied by gas is |
| A. | area |
| B. | volume |
| C. | space |
| D. | mass |
| Answer» C. space | |
| 423. |
When displacement x = 0, then kinetic energy of system is |
| A. | minimum |
| B. | maximum |
| C. | constant |
| D. | zero |
| Answer» C. constant | |
| 424. |
Average kinetic energy of gas molecules is proportional to |
| A. | internal energy |
| B. | thermodynamic temperature |
| C. | enthalpy |
| D. | condensation point |
| Answer» C. enthalpy | |
| 425. |
Measure of average kinetic energy of molecules is |
| A. | temperature |
| B. | energy |
| C. | internal energy |
| D. | enthalpy |
| Answer» B. energy | |
| 426. |
Intensity of a wave is directly proportional to the |
| A. | amplitude |
| B. | square of amplitude |
| C. | cube of amplitude |
| D. | frequency |
| Answer» C. cube of amplitude | |
| 427. |
Force exerted on a person by atmosphere is |
| A. | 200 000 N |
| B. | 300 000 N |
| C. | 400 000 N |
| D. | 500 000 N |
| Answer» B. 300 000 N | |
| 428. |
Speed of Earth when a rock of mass 60 kg falling towards Earth with speed of 20 m s-1 is {{}} |
| A. | 2.4 10-22 m s-1 |
| B. | 3.5 10-33 m s-1 |
| C. | 2.0 10-22 m s-1 |
| D. | 3 1034 m s-1 |
| Answer» D. 3 1034 m s-1 | |
| 429. |
Hall voltage is directly proportional to |
| A. | current |
| B. | electric field |
| C. | magnetic flux density |
| D. | all of above |
| Answer» D. all of above | |
| 430. |
Force that acts on both quarks and leptons is |
| A. | strong nuclear force |
| B. | weak interaction |
| C. | intermediate interaction |
| D. | nuclear force |
| Answer» C. intermediate interaction | |
| 431. |
If there is no net force acting on body, then its acceleration is |
| A. | zero |
| B. | constant |
| C. | increasing |
| D. | decreasing |
| Answer» B. constant | |
| 432. |
Change of liquid in to gas without boiling is called |
| A. | vaporization |
| B. | sublimation |
| C. | boiling |
| D. | evaporation |
| Answer» E. | |
| 433. |
Adiabatic bulk modulus is equal to: |
| A. | P; where : the ratio of the specific heat capacities of the gas, P: pressure |
| B. | Pressure |
| C. | The ratio of the specific heat capacities of the gas |
| D. | P; where : the ratio of the specific heat capacities of the gas, P: pressure |
| Answer» B. Pressure | |
| 434. |
When the work done in moving a particle round a closed loop in a field is zero, the forces in the field are called |
| A. | Zero forces |
| B. | Non-Conservative forces |
| C. | Conservative forces |
| D. | Viscous forces |
| Answer» D. Viscous forces | |
| 435. |
Isothermal bulk modulus is equal to |
| A. | P; where : the ratio of the specific heat capacities of the gas, P: pressure |
| B. | Pressure |
| C. | The ratio of the specific heat capacities of the gas |
| D. | P; where : the ratio of the specific heat capacities of the gas, P: pressure |
| Answer» C. The ratio of the specific heat capacities of the gas | |
| 436. |
Law which relates pressure and volume of gas is |
| A. | Charles's law |
| B. | Avogadro's law |
| C. | Boyle's law |
| D. | ideal gas law |
| Answer» D. ideal gas law | |
| 437. |
Momentum possessed by spinning objects is called |
| A. | linear momentum |
| B. | angular momentum |
| C. | normal momentum |
| D. | degrees' momentum |
| Answer» C. normal momentum | |
| 438. |
Photon of electromagnetic radiation is |
| A. | ray |
| B. | ray |
| C. | ray |
| D. | x-ray |
| Answer» D. x-ray | |
| 439. |
Effect of diffraction is greatest if waves pass through a gap with width equal to |
| A. | frequency |
| B. | wavelength |
| C. | amplitude |
| D. | wavefront |
| Answer» C. amplitude | |
| 440. |
Wavelength of a 65 kg person running at a speed of 3 m s -1 through an opening of width 0.80 m is {{}} |
| A. | 34 m |
| B. | 35 m |
| C. | 3.4 10-36 m |
| D. | 3.5 m |
| Answer» D. 3.5 m | |
| 441. |
Electrons show diffraction effects because their de Broglie wavelength is similar to |
| A. | spacing between atomic layers |
| B. | no. of atomic layers |
| C. | nature of atomic layers |
| D. | positioning of atomic layers |
| Answer» B. no. of atomic layers | |
| 442. |
Force exerted by bat on ball if it strikes a ball of mass 0.16 kg initially hits bat with speed of 25 m s-1 with time impact of 0.003 s is {{}} |
| A. | 145 N |
| B. | 1333.33 N |
| C. | 1456.7 N |
| D. | 6543 N |
| Answer» C. 1456.7 N | |
| 443. |
As wave travels, intensity |
| A. | increases |
| B. | remains same |
| C. | decreases |
| D. | varies |
| Answer» D. varies | |
| 444. |
Magnitude of induced e.m.f is proportional to |
| A. | rate of change of current |
| B. | rate of change of voltage |
| C. | rate of change of magnetic flux linkage |
| D. | rate of change of resistance |
| Answer» D. rate of change of resistance | |
| 445. |
If the Earth's magnetic field lines pass through the Hall probe in opposite direction, then the change in reading of voltmeter is |
| A. | thrice the Earth's magnetic flux density |
| B. | four times the Earth's magnetic flux density |
| C. | five times the Earth's magnetic flux density |
| D. | twice the Earth's magnetic flux density |
| Answer» E. | |
| 446. |
Force that acts on a mass of 1 g and gives it an acceleration of 1 cm s -2 is defined as {{}} |
| A. | 1 newton |
| B. | 1 dyne |
| C. | 1 pound-force |
| D. | 1 pa-force |
| Answer» C. 1 pound-force | |
| 447. |
Flux density is defined by {{}} |
| A. | FIL |
| B. | F (IL |
| C. | IL |
| D. | I (FL |
| Answer» C. IL | |
| 448. |
When a gas or a liquid is subjected to an increased pressure, the substance contracts, the bulk strain is defined as |
| A. | final volume original volume |
| B. | final pressure original pressure |
| C. | change in volume original volume |
| D. | original volume change in volume |
| Answer» D. original volume change in volume | |
| 449. |
Base unit among following is |
| A. | Newton |
| B. | Joule |
| C. | Candela |
| D. | Watt |
| Answer» D. Watt | |
| 450. |
Phase difference between a node and an antinode is |
| A. | 90 |
| B. | 45 |
| C. | 180 |
| D. | 360 |
| Answer» D. 360 | |