MCQOPTIONS
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MCQOPTIONS
This section includes 754 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
How many main frontiers of fundamental science ? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 552. |
How many days would be in a year if the distance between the earth and the sun were reduced to half of its present value (assuming circular orbit) ? |
| A. | 365 days |
| B. | 730 days |
| C. | 329 days |
| D. | 129 days |
| Answer» E. | |
| 553. |
Holes can exist in____________________? |
| A. | Conductors |
| B. | Insulators |
| C. | Semi conductors |
| D. | All of the above |
| Answer» D. All of the above | |
| 554. |
hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________? |
| A. | 180° |
| B. | 0° |
| C. | 90° |
| D. | 45° |
| Answer» D. 45° | |
| 555. |
Heating a magnet will ____________________? |
| A. | weaken it |
| B. | strengthen it |
| C. | reverse its polarity |
| D. | demagnetize it completely |
| Answer» B. strengthen it | |
| 556. |
Ground state energy of the 4th orbit in a H-atom is_____________? |
| A. | 13.60 eV |
| B. | 3.40 eV |
| C. | 0.85 eV |
| D. | 1.51 eV |
| Answer» D. 1.51 eV | |
| 557. |
Gravitational P.E of a body has____________________? |
| A. | no formula |
| B. | a formula mgh only |
| C. | a formula |
| D. | no general formula |
| Answer» E. | |
| 558. |
Gravitation force of sun is__________? |
| A. | 274 m/s² |
| B. | 362 m/s² |
| C. | 300 m/s² |
| D. | None of these |
| Answer» B. 362 m/s² | |
| 559. |
Gravitation force of moon is_________? |
| A. | 7.2 m/s² |
| B. | 1.62 m/s² |
| C. | 9.8 m/s² |
| D. | 3.75 m/s² |
| Answer» C. 9.8 m/s² | |
| 560. |
Gravitation force of earth is___________? |
| A. | 9.80 m/s² |
| B. | 7.21 m/s² |
| C. | 1.62 m/s² |
| D. | None of these |
| Answer» B. 7.21 m/s² | |
| 561. |
Gives the definition of metre in terms of wavelength of red cadmium light ___________________? |
| A. | Newton |
| B. | Einstein |
| C. | Michelson |
| D. | Galileo |
| Answer» D. Galileo | |
| 562. |
Geothermal energy is a _______________________ source of energy? |
| A. | non-renewable |
| B. | stable |
| C. | renewable |
| D. | none of the above |
| Answer» D. none of the above | |
| 563. |
Geostationary satellite completes one rotation around the earth in_______________? |
| A. | 3 hours |
| B. | 6 hours |
| C. | 12 hours |
| D. | 24 hours |
| Answer» E. | |
| 564. |
Geiger counter is suitable for _________________? |
| A. | Fast counting |
| B. | Extremely fast counting |
| C. | Slow counting |
| D. | All situations |
| Answer» D. All situations | |
| 565. |
Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________? |
| A. | volume |
| B. | pressure |
| C. | absolute temperature |
| D. | time |
| Answer» D. time | |
| 566. |
Galvanometer is a very sensitive device with______________________? |
| A. | very low damping |
| B. | very high damping |
| C. | no damping at all |
| D. | radial field disintegration |
| Answer» B. very high damping | |
| 567. |
Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe? |
| A. | One |
| B. | Two |
| C. | Four time |
| D. | None of these |
| Answer» C. Four time | |
| 568. |
Forward current through a semi conductor diode circuit is due to____________? |
| A. | minority carriers |
| B. | majority carriers |
| C. | holes |
| D. | electron |
| Answer» C. holes | |
| 569. |
Formation of large molecule by joining small molecules is_________________? |
| A. | Fusion |
| B. | Polymerization |
| C. | Crystallization |
| D. | Subtraction |
| Answer» C. Crystallization | |
| 570. |
Forced vibration is known as_____________________? |
| A. | Simple harmonic vibration |
| B. | Natural vibration |
| C. | Driven harmonic vibration |
| D. | Free vibration |
| Answer» D. Free vibration | |
| 571. |
For which position maximum blood pressure in the body have the smallest value ? |
| A. | Standing straight |
| B. | Sitting on chair |
| C. | Sitting on ground |
| D. | Laying horizontally |
| Answer» E. | |
| 572. |
For what displacement the P.E becomes 1/4 of its maximum value ? |
| A. | x = x’ |
| B. | x = x’/2 |
| C. | x = x’/4 |
| D. | x = x(2)’/2 |
| Answer» C. x = x’/4 | |
| 573. |
For the successful operation of Heat engine which condition should be met ? |
| A. | cyclic process |
| B. | operated at certain temperature difference |
| C. | both A and B |
| D. | none of these |
| Answer» D. none of these | |
| 574. |
For normal adjustment, length of astronomical telescope is______________? |
| A. | fo + fe |
| B. | fo – fe |
| C. | fo / fe |
| D. | fe / fo |
| Answer» B. fo – fe | |
| 575. |
For ___________ flow the path of the fluid particles cannot be tracked? |
| A. | Laminar |
| B. | Streamline |
| C. | Turbulent |
| D. | Both A and B |
| Answer» D. Both A and B | |
| 576. |
For confinement of electron in a box of radius 10-14m the electron, speed should be_____________? |
| A. | 107m/sec |
| B. | Should be greater than the speed of light. |
| C. | Be zero |
| D. | Not be wave-like |
| Answer» C. Be zero | |
| 577. |
For chain reaction to build up the size of the radioactive target should be______________? |
| A. | Greater than the critical size |
| B. | Less than the critical size |
| C. | Equal to the critical size |
| D. | All of above can build up a change reaction |
| Answer» B. Less than the critical size | |
| 578. |
For a simple pendulu,m the restoring force is caused by________________? |
| A. | Gravity |
| B. | Spring |
| C. | Hand |
| D. | All of these |
| Answer» B. Spring | |
| 579. |
For a gas obeying Boyles law if the pressure is doubled the volume becomes________________? |
| A. | double |
| B. | one half |
| C. | four times |
| D. | one fourth |
| Answer» C. four times | |
| 580. |
Flight of a rocket in the space is an example of______________________? |
| A. | second law of motion |
| B. | third law of motion |
| C. | first law of motion |
| D. | law of gravitation |
| Answer» C. first law of motion | |
| 581. |
Final image produced by a compound microscope is_____________? |
| A. | real and inverted |
| B. | real and erect |
| C. | virtual and erect |
| D. | virtual and inverted |
| Answer» E. | |
| 582. |
Excited atoms return to their ground state in_______________? |
| A. | 10-10s |
| B. | 10-8s |
| C. | 10-6s |
| D. | 10-9s |
| Answer» C. 10-6s | |
| 583. |
Errors in the transmission of power through optic fiber can be minimized by using a______________? |
| A. | Multimode index fiber |
| B. | Graded index fiber |
| C. | Single mode step index fiber |
| D. | Copper wire |
| Answer» C. Single mode step index fiber | |
| 584. |
Energy needed to magnetize and demagnetize is represented by _________________? |
| A. | Hysteresis curve |
| B. | Hysteresis loop area |
| C. | Hysteresis loop |
| D. | Straight line |
| Answer» C. Hysteresis loop | |
| 585. |
Electrons_________________? |
| A. | Can exist inside the nucleus |
| B. | Cannot exist inside the nucleus |
| C. | Can exist both inside and outside the nucleus |
| D. | Do not know |
| Answer» E. | |
| 586. |
Electrons present in p-type material due to thermal pair generation are_____________? |
| A. | majority carriers |
| B. | minority carriers |
| C. | dual carriers |
| D. | blockers |
| Answer» C. dual carriers | |
| 587. |
Electron moves in the orbit as________________? |
| A. | Simple vibratory motion |
| B. | Standing wave motion |
| C. | Vibratory motion like up and down |
| D. | S.H.M likes the sound |
| Answer» C. Vibratory motion like up and down | |
| 588. |
Electron cannot exist in the nucleus it is confirmed by observing that______________? |
| A. | It does emit radiation |
| B. | Its size as compare to proton and neutron is very small |
| C. | No antiparticle of electron is present |
| D. | The velocity of electron must be very high according to uncertainty principle |
| Answer» E. | |
| 589. |
Electromagnetic waves travel in free space with the speed of___________________? |
| A. | λ-rays |
| B. | Positive rays |
| C. | Cathode rays |
| D. | More than sound waves |
| Answer» B. Positive rays | |
| 590. |
Electromagnetic waves transport___________________? |
| A. | Energy |
| B. | Momentum |
| C. | Mass |
| D. | Heat |
| Answer» B. Momentum | |
| 591. |
Electromagnetic waves emitted from antenna are________________? |
| A. | Stationary |
| B. | Longitudinal |
| C. | Transverse |
| D. | All the above |
| Answer» D. All the above | |
| 592. |
Electrical resonance is observed in_______________? |
| A. | Radio |
| B. | Microwave oven |
| C. | Both in radio and microwave oven |
| D. | Neither in radio nor in a microwave oven |
| Answer» B. Microwave oven | |
| 593. |
Electrical energy is converted to heat at the rate of___________________? |
| A. | IRt |
| B. | I2R |
| C. | I2Rt |
| D. | VIt |
| Answer» C. I2Rt | |
| 594. |
Electrical energy is measured in___________________? |
| A. | watt |
| B. | horse power |
| C. | kilo watt |
| D. | kilowatt hour |
| Answer» E. | |
| 595. |
Einstein’s photoelectric equation is given by_______________? |
| A. | 1/2 mvmax2=hf+Φ |
| B. | 1/2 mvmax2-hf = Φ |
| C. | 1/2 mvmax2=hf-Φ |
| D. | All of above are correct |
| Answer» D. All of above are correct | |
| 596. |
During the fission process a large amount of______________? |
| A. | Heat energy is released |
| B. | Nuclear energy is released |
| C. | Chemical energy is released |
| D. | Light energy is released |
| Answer» C. Chemical energy is released | |
| 597. |
During long jump, athlete runs before taking the jump. By doing so he__________________? |
| A. | provide him a larger inertia |
| B. | decreases his inertia |
| C. | decreases his momentum |
| D. | increases his momentum |
| Answer» E. | |
| 598. |
During fusion of hydrogen into helium________________? |
| A. | Energy is absorbed |
| B. | Energy is released |
| C. | Mass is increased due to energy absorption |
| D. | Mass is reduced due to the energy released |
| Answer» C. Mass is increased due to energy absorption | |
| 599. |
During an encounter with an atom alpha particle knocks out ______________? |
| A. | Protons |
| B. | Electrons |
| C. | Neutrons |
| D. | Nothing |
| Answer» C. Neutrons | |
| 600. |
Doppler effect applies to____________________? |
| A. | sound wave only |
| B. | light wave only |
| C. | both sound and light waves |
| D. | neither sound nor light wave |
| Answer» D. neither sound nor light wave | |