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.
| 701. |
One mega watt hour is equal to_________________? |
| A. | 36 x 106 J |
| B. | 36 x 1012 J |
| C. | 36 x 109 J |
| D. | 36 x 108 J |
| Answer» E. | |
| 702. |
A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire ? |
| A. | 0.01J |
| B. | 0.02J |
| C. | 0.04J |
| D. | 1.0J |
| Answer» B. 0.02J | |
| 703. |
Work has the dimension as that of same as that of__________________? |
| A. | torque |
| B. | angular momentum |
| C. | linear momentum |
| D. | power |
| Answer» B. angular momentum | |
| 704. |
When two protons are brought together_____________________? |
| A. | Kinetic energy increases |
| B. | P.E. between them increases |
| C. | P.E. between them decreases |
| D. | P.E. between tem does not change |
| Answer» C. P.E. between them decreases | |
| 705. |
A man lifts vertically a weight of 40kg through 1m in 10s; while a chile lifts vertically a weight of 10kg through a distance of 1m in 1s. What will be correct inference ? |
| A. | man does more work than child |
| B. | child does more work than man |
| C. | both do the same amount of work |
| D. | it is a foolish question |
| Answer» C. both do the same amount of work | |
| 706. |
The area under the force displacement graph represents__________________? |
| A. | area |
| B. | work done |
| C. | power |
| D. | none of these |
| Answer» C. power | |
| 707. |
The dimension of power is_______________? |
| A. | [ML2T-3] |
| B. | [ML2T-2] |
| C. | [ML2T3] |
| D. | none of these |
| Answer» B. [ML2T-2] | |
| 708. |
Which of the following types of force can do no work on the particle on which it acts ? |
| A. | frictional force |
| B. | gravitational force |
| C. | elastic force |
| D. | centripetal force |
| Answer» E. | |
| 709. |
The work done by friction is__________________? |
| A. | positive |
| B. | negative |
| C. | zero |
| D. | none of these |
| Answer» C. zero | |
| 710. |
Slope of work time graph is equal to____________________? |
| A. | displacement |
| B. | acceleration |
| C. | power |
| D. | energy |
| Answer» D. energy | |
| 711. |
Why should a resistance be introduced in a circuit in series deliberately ? |
| A. | to increase current |
| B. | to decrease current |
| C. | to control current |
| D. | just to give a good look to circuit |
| Answer» C. to control current | |
| 712. |
The relation between horse power and watt is_________________? |
| A. | 1 hp = 546 watts |
| B. | 1 hp = 746 watts |
| C. | 1 hp = 1000 watts |
| D. | 1 hp = 946 watts |
| Answer» C. 1 hp = 1000 watts | |
| 713. |
When arrow is released form its bow, its energy is transformed from _____________________? |
| A. | heat energy to K.E |
| B. | elastic P.E to K.E |
| C. | elemical energy to elastic P.E |
| D. | K.E to elastic P.E. |
| Answer» C. elemical energy to elastic P.E | |
| 714. |
The escape velocity form the earth surface in km S-1 is____________________? |
| A. | 4.2 km S-1 |
| B. | 7.5 km S-1 |
| C. | 9.5 km S-1 |
| D. | 1.1 km S-1 |
| Answer» E. | |
| 715. |
A fuse is placed in series with the circuit to protect against__________________? |
| A. | high power |
| B. | high voltage |
| C. | high current |
| D. | over heating |
| Answer» E. | |
| 716. |
If moon radius is 1600 km and g on its surface is 1.6 ms-2 then the escape velocity on the moon is ___________________? |
| A. | 1600 ms-1 |
| B. | 50.6 ms-1 |
| C. | 71.6 ms-1 |
| D. | 2263ms-1 |
| Answer» C. 71.6 ms-1 | |
| 717. |
Which experiment shows that wavelength of light is smaller than that of sound___________________? |
| A. | Diffraction |
| B. | Polarization |
| C. | Interference |
| D. | Reflection |
| Answer» B. Polarization | |
| 718. |
Work done by variable force is determine by dividing____________________? |
| A. | force into small interval |
| B. | displacement into small interval |
| C. | both force and displacement into small intervals |
| D. | force into small and displacement into large intervals |
| Answer» C. both force and displacement into small intervals | |
| 719. |
When a force is parallel to the direction of motion of the body, then work done on the body is_____________________? |
| A. | zero |
| B. | minimum |
| C. | infinity |
| D. | maximum |
| Answer» E. | |
| 720. |
If a body a mass of 2 kg is raised vertically through 2m, then the work done will be _________________? |
| A. | 38.2 J |
| B. | 392.1 J |
| C. | 39.2 J |
| D. | 3.92 J |
| Answer» D. 3.92 J | |
| 721. |
Proton electron neutron and a particles have same momentum. Which of them have highest K.E ? |
| A. | Proton |
| B. | electron |
| C. | neutron |
| D. | a-particle |
| Answer» C. neutron | |
| 722. |
The average power and instantaneous power become equal if work is done at __________________? |
| A. | any rate |
| B. | at variable rate |
| C. | at uniform rate |
| D. | at high rate |
| Answer» D. at high rate | |
| 723. |
Diffraction effect is____________________? |
| A. | more for a round edge |
| B. | less for a round edge |
| C. | more for a sharp edge |
| D. | less for a sharp edge |
| Answer» D. less for a sharp edge | |
| 724. |
A light ray traveling form rarer to denser medium suffers a phase change of__________________? |
| A. | 60° |
| B. | 90° |
| C. | 180° |
| D. | 45° |
| Answer» D. 45° | |
| 725. |
Light on passing through a Polaroid is ___________________? |
| A. | plane polarized |
| B. | un-polarized |
| C. | circularly polarized |
| D. | elliptically polarized |
| Answer» B. un-polarized | |
| 726. |
A diffraction grating has 500 lines per mm. Its slit spacing or grating element will be equal to ____________________? |
| A. | 500 mm |
| B. | 5 x 10-3 mm |
| C. | 2 x 10-5 mm |
| D. | 2 x 10-3 mm |
| Answer» E. | |
| 727. |
The blue colour of the sky is due to___________________? |
| A. | diffraction |
| B. | reflection |
| C. | polarization |
| D. | scattering |
| Answer» E. | |
| 728. |
In double slit experiment if one of the two slit is covered then________________? |
| A. | no interference fringes are observed |
| B. | no diffraction fringes are observed |
| C. | no fringes observed |
| D. | interference pattern not disturbed |
| Answer» B. no diffraction fringes are observed | |
| 729. |
In the shadow of a ball the central portion appears bright that happens due to_________________? |
| A. | Interference |
| B. | Diffraction |
| C. | Polarization |
| D. | Refraction |
| Answer» C. Polarization | |
| 730. |
Which is not optically active ? |
| A. | sugar |
| B. | tartaric acid |
| C. | water |
| D. | sodium chlorate |
| Answer» D. sodium chlorate | |
| 731. |
Crystals of a material can behave as_________________? |
| A. | Convex lens |
| B. | Interferometer |
| C. | Diffraction grating |
| D. | Concave |
| Answer» D. Concave | |
| 732. |
Light reaches the earth form sun in nearly____________________? |
| A. | 15 minutes |
| B. | 10 minutes |
| C. | 8 minutes |
| D. | 8 minutes 30 seconds |
| Answer» E. | |
| 733. |
When light incident normally on thin film the path difference depends upon ________________? |
| A. | thickness of the film only |
| B. | nature of the film only |
| C. | angle of indidence only |
| D. | all thickness nature and angle of incidence |
| Answer» E. | |
| 734. |
When crest of one wave falls over the trough of the other wave this phenomenon is known as________________? |
| A. | polarization |
| B. | constructive interference |
| C. | destructive interference |
| D. | diffraction |
| Answer» D. diffraction | |
| 735. |
In Young double slit experiment, if white light is used____________________? |
| A. | alternate dark and bright fringes will be seen |
| B. | coloured fringes will be seen |
| C. | no interference fringes will be seen |
| D. | impossible to predict |
| Answer» C. no interference fringes will be seen | |
| 736. |
In an interference pattern______________________? |
| A. | bright fringes are wider than dark fringes |
| B. | dark fringes are wider than bright fringe |
| C. | both dark and bright fringes are of equal width |
| D. | central fringes are brighter than the outer fringes |
| Answer» D. central fringes are brighter than the outer fringes | |
| 737. |
Electrical energy is converted to heat at the rate of___________________? |
| A. | IRt |
| B. | I2R |
| C. | I2Rt |
| D. | VIt |
| Answer» C. I2Rt | |
| 738. |
Which one is the best material for making connecting wires ? |
| A. | iron |
| B. | tungsten |
| C. | silver |
| D. | copper |
| Answer» E. | |
| 739. |
Which one of the following bulbs has the least resistance ? |
| A. | 100 watt |
| B. | 200 watt |
| C. | 300 watt |
| D. | 60 watt |
| Answer» D. 60 watt | |
| 740. |
In double slit experiment we observe _____________________? |
| A. | interference fringes only |
| B. | diffraction fringes only |
| C. | both interference and diffraction fringes |
| D. | polirized frringes |
| Answer» D. polirized frringes | |
| 741. |
Optical active crystals rotates the __________________? |
| A. | vibrating plane |
| B. | polarization plane |
| C. | diffraction plane |
| D. | interference plane |
| Answer» C. diffraction plane | |
| 742. |
Internal resistance is the resistance offered by________________? |
| A. | source of EMF |
| B. | conductor |
| C. | resistor |
| D. | capacitor |
| Answer» B. conductor | |
| 743. |
Which one of the following materials is useful for making bulb filaments ? |
| A. | constantan |
| B. | nichrome |
| C. | copper |
| D. | tungsten |
| Answer» E. | |
| 744. |
The beats frequency (sensible) for a human car is _____________________? |
| A. | 42Hz |
| B. | 7 Hz |
| C. | 256Hz |
| D. | 262Hz |
| Answer» C. 256Hz | |
| 745. |
Three bulbs are rating 40W 60W and 100W designed to work on 220V mains. Which bulb will burn most brightly if they are connected in series across 220 V mains ? |
| A. | 40 W bulb |
| B. | 60 W blub |
| C. | 100 W blub |
| D. | all will burn equally brightly |
| Answer» B. 60 W blub | |
| 746. |
In the following figure, the terminal potential is ___________________ ? |
| A. | zero |
| B. | 2V |
| C. | 12V |
| D. | 36V |
| Answer» B. 2V | |
| 747. |
Resistance of a wire on increasing its temperature will_________________? |
| A. | increase with rise in temperature |
| B. | decrease with rise in temperature |
| C. | will remain same |
| D. | depends upon altitude of experimentation |
| Answer» B. decrease with rise in temperature | |
| 748. |
Production of heat due to an electric current flowing through a conductor is given by _________________? |
| A. | Joule effect |
| B. | Joule Thomsons effect |
| C. | Comptons effect |
| D. | Feed back effect |
| Answer» B. Joule Thomsons effect | |
| 749. |
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 | |
| 750. |
All electrical appliances are connected in parallel to each other between the main line and neutral wire to get ______________________? |
| A. | same current |
| B. | same current and potential difference |
| C. | different current but same potential difference |
| D. | different current and potential differences |
| Answer» D. different current and potential differences | |