MCQOPTIONS
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MCQOPTIONS
This section includes 778 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
The current through a metallic conductor is due to the motion of _________________? |
| A. | free electrons |
| B. | protons |
| C. | neutrons |
| D. | still under controversy |
| Answer» B. protons | |
| 752. |
Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________? |
| A. | isothermal law |
| B. | adiabatic law |
| C. | isochoric law |
| D. | all of the above |
| Answer» C. isochoric law | |
| 753. |
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 | |
| 754. |
Thermocouples convert___________________? |
| A. | heat energy into electrical energy |
| B. | heat energy into light energy |
| C. | heat energy into mechanical energy |
| D. | mechanical energy into heat energy |
| Answer» B. heat energy into light energy | |
| 755. |
Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ? |
| A. | 40 W |
| B. | 90W |
| C. | 100W |
| D. | 120W |
| Answer» C. 100W | |
| 756. |
Beats are the results of____________________? |
| A. | diffraction of sound waves |
| B. | constructive and destructive interference |
| C. | polarization |
| D. | destructive interference |
| Answer» C. polarization | |
| 757. |
An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________? |
| A. | 2KWh |
| B. | 20KWh |
| C. | 6KWh |
| D. | 12KWh |
| Answer» B. 20KWh | |
| 758. |
A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ? |
| A. | 1/4f |
| B. | 1/2f |
| C. | frequency lower than 20 Hz |
| D. | 2f |
| Answer» D. 2f | |
| 759. |
The value of γ for diatomic gas is_______________? |
| A. | 1.67 |
| B. | 1.4 |
| C. | γ = 1.3 |
| D. | None |
| Answer» C. γ = 1.3 | |
| 760. |
The performance of a refrigerator is described by________________? |
| A. | efficiency |
| B. | coefficient of performance |
| C. | both A and B |
| D. | not described |
| Answer» C. both A and B | |
| 761. |
The dimension of elastic modulus is ___________________ ? |
| A. | ML-1T-2 |
| B. | ML-2T-2 |
| C. | MLT-2 |
| D. | ML2T-2 |
| Answer» B. ML-2T-2 | |
| 762. |
In open organ pipe___________________? |
| A. | only even harmonics are present |
| B. | only odd harmonics are present |
| C. | both even and odd harmonics are present |
| D. | selected harmonics are present |
| Answer» D. selected harmonics are present | |
| 763. |
In which process entropy remains constant________________? |
| A. | isobaric |
| B. | isochoric |
| C. | adiabatic |
| D. | isothermal |
| Answer» D. isothermal | |
| 764. |
In which process all the heat supplied is converted into work done ? |
| A. | isothermal |
| B. | isochoric |
| C. | isobaric |
| D. | isentropic |
| Answer» B. isochoric | |
| 765. |
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 | |
| 766. |
If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________? |
| A. | Boyles law |
| B. | Charles law |
| C. | Ideal gas law |
| D. | Avagadros law |
| Answer» C. Ideal gas law | |
| 767. |
According to Pascals law the pressure of gas in a vessel is_____________? |
| A. | Different in different direction |
| B. | Same in all direction |
| C. | Same only along opposite directions |
| D. | Same only along normal directions |
| Answer» C. Same only along opposite directions | |
| 768. |
It is possible to distinguish between transverse and longitudinal waves form the property of __________________? |
| A. | refraction |
| B. | polarization |
| C. | interference |
| D. | diffraction |
| Answer» C. interference | |
| 769. |
When body is in motion, ____________ always changes? |
| A. | its velocity |
| B. | its acceleration |
| C. | its position vector |
| D. | its momentum |
| Answer» D. its momentum | |
| 770. |
Silence zone takes place due to____________________? |
| A. | constructive interference |
| B. | destructive interference |
| C. | beats |
| D. | resonance |
| Answer» C. beats | |
| 771. |
Mach number is used in connection with the speed of___________? |
| A. | Ship |
| B. | Light |
| C. | Sound |
| D. | aircraft |
| Answer» E. | |
| 772. |
Which of the following waves have smallest velocity in vacuum? |
| A. | Ultraviolet |
| B. | Sound |
| C. | Infra-Red |
| D. | Micro |
| Answer» C. Infra-Red | |
| 773. |
The mass-energy relation is the outcome of____________? |
| A. | Quantum theory |
| B. | General theory of relativity |
| C. | Special theory of relativity |
| D. | None of these |
| Answer» D. None of these | |
| 774. |
A man is in a car is moving with velocity of 36km/hr. His speed with repect to the car is ____________________? |
| A. | 10m/s |
| B. | 36m/s |
| C. | zero |
| D. | infinite |
| Answer» D. infinite | |
| 775. |
When collision between the bodies in a system is inelastic in nature then for system ____________________? |
| A. | momentum changes but K.E remain conserve |
| B. | K.E changes but momentum remain conserve |
| C. | both momentum and K.E changes |
| D. | both momentum and K.E remain conserve |
| Answer» C. both momentum and K.E changes | |
| 776. |
The physics of moving charge particles is known as__________? |
| A. | Plasma physics |
| B. | Electro-static’s |
| C. | Electro-magnetic |
| D. | Electro-dynamics |
| Answer» E. | |
| 777. |
The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear? |
| A. | Solid State Physics |
| B. | Plasma Physics |
| C. | structure is called |
| D. | Nuclear Physics |
| E. | Particle Physics |
| Answer» E. Particle Physics | |
| 778. |
The branch of physics which deals with the living things is called_________? |
| A. | biological sciences |
| B. | physical sciences |
| C. | cell systems |
| D. | elementary physics |
| Answer» B. physical sciences | |