MCQOPTIONS
Saved Bookmarks
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.
| 151. |
There are three bulbs of 60W 100W and 200W which bulb has thickest filament ? |
| A. | 100W |
| B. | 200W |
| C. | 60W |
| D. | all |
| Answer» C. 60W | |
| 152. |
Resistance of a conductor depends upon_________________? |
| A. | nature of conductor |
| B. | dimension of conductor |
| C. | physical state of the conductor |
| D. | all of above |
| Answer» E. | |
| 153. |
Specific resistance of a wire____________________? |
| A. | will depend on its length |
| B. | will depend on its radius |
| C. | will depend on the type of material of the wire |
| D. | will depend on none of the above |
| Answer» D. will depend on none of the above | |
| 154. |
A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part _________________? |
| A. | remains the same |
| B. | is doubled |
| C. | is halved |
| D. | becomes zero |
| Answer» B. is doubled | |
| 155. |
One kilowatt hour is the amount of energy delivered during _______________? |
| A. | one second |
| B. | one day |
| C. | one minute |
| D. | one hour |
| Answer» E. | |
| 156. |
When same current passes for same time through a thick and thin wire_________________? |
| A. | more heat is produced in thick wire |
| B. | more heat is produced in thin wire |
| C. | no heat is produced in wire |
| D. | less heat is produced in thick wire |
| Answer» C. no heat is produced in wire | |
| 157. |
Resistance of a super conductor is ______________________? |
| A. | finite |
| B. | infinite |
| C. | zero |
| D. | changes with every conductor |
| Answer» D. changes with every conductor | |
| 158. |
How much heat does a 40 W bulb generates in one hour ? |
| A. | 144000J |
| B. | 144J |
| C. | 1.44J |
| D. | 14J |
| Answer» B. 144J | |
| 159. |
An electric iron is marked 20 volts 500W. The units consumed by it in using if for 24 hours will be______________? |
| A. | 12 |
| B. | 24 |
| C. | 5 |
| D. | 1100 |
| Answer» B. 24 | |
| 160. |
In liquids and gases the current is due to the motion________________? |
| A. | negative charges |
| B. | positive charges |
| C. | both negative and positive charges |
| D. | neutral particles |
| Answer» D. neutral particles | |
| 161. |
The graphical representation of Ohms law is___________________? |
| A. | hyperbola |
| B. | ellipse |
| C. | parabola |
| D. | straight line |
| Answer» E. | |
| 162. |
Electrical energy is measured in___________________? |
| A. | watt |
| B. | horse power |
| C. | kilo watt |
| D. | kilowatt hour |
| Answer» E. | |
| 163. |
In monochromatic red light a blue book will probably appear to be_________________? |
| A. | black |
| B. | purple |
| C. | green |
| D. | no scientific reasoning available |
| Answer» B. purple | |
| 164. |
The resistance of a conductor at absolute zero (OK) is________________? |
| A. | zero almost |
| B. | infinite almost |
| C. | no prediction at all |
| D. | may increase or decrease |
| Answer» B. infinite almost | |
| 165. |
Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________? |
| A. | 4 x 10-10 m |
| B. | 2 x 10-10 m |
| C. | 0.02×10-10m |
| D. | 20×10-10m |
| Answer» C. 0.02×10-10m | |
| 166. |
Which one of the following properties of light does not change with the nature of the medium ? |
| A. | velocity |
| B. | wavelength |
| C. | amplitude |
| D. | frequency |
| Answer» E. | |
| 167. |
Longitudinal waves do not exhibit _____________________? |
| A. | reflection |
| B. | refraction |
| C. | diffraction |
| D. | polarization |
| Answer» E. | |
| 168. |
Which one of the following is nearly monochromatic light ? |
| A. | light form fluorescent tube |
| B. | light form neon lamp |
| C. | light form sodium lamp |
| D. | light form simple lamp |
| Answer» D. light form simple lamp | |
| 169. |
In a plane polarized light _________________? |
| A. | vibration in all direction |
| B. | vibration in two mutually perpendicular directions |
| C. | vibration take place in a direction perpendicular to the direction of propagation of light |
| D. | no vibration at all |
| Answer» D. no vibration at all | |
| 170. |
Which one of the following cannot be polarized ? |
| A. | radio waves |
| B. | ultraviolot rays |
| C. | X-rays |
| D. | sound waves |
| Answer» E. | |
| 171. |
Two sources of light are coherent if they emit rays of_______________? |
| A. | same wavelength |
| B. | same amplitude of vibration |
| C. | same wave length with constant phase difference |
| D. | same amplitude and wavelength |
| Answer» D. same amplitude and wavelength | |
| 172. |
According to Einstein light travels form one place to another in the form of ________________? |
| A. | waves |
| B. | particles |
| C. | photons |
| D. | it was not his discovery |
| Answer» D. it was not his discovery | |
| 173. |
Central spot of Newtons rings __________________? |
| A. | bright |
| B. | dark for large wavelength |
| C. | dark |
| D. | bright for large wavelength |
| Answer» B. dark for large wavelength | |
| 174. |
The velocity of light was determined accurately by_______________? |
| A. | Newton |
| B. | Michelson |
| C. | Huygen |
| D. | Young |
| Answer» C. Huygen | |
| 175. |
Gives the definition of metre in terms of wavelength of red cadmium light ___________________? |
| A. | Newton |
| B. | Einstein |
| C. | Michelson |
| D. | Galileo |
| Answer» D. Galileo | |
| 176. |
A thing that emits its own light is___________________? |
| A. | luminous |
| B. | non-luminous |
| C. | incandescent |
| D. | bright |
| Answer» B. non-luminous | |
| 177. |
appearance of colour in thin films is due to ____________________? |
| A. | diffraction |
| B. | dispersion |
| C. | interference |
| D. | polarization |
| Answer» D. polarization | |
| 178. |
Diffraction fringes are____________________? |
| A. | equally spaced |
| B. | distance between them increases |
| C. | distance between then decreases |
| D. | they are adjacent with no space in between |
| Answer» D. they are adjacent with no space in between | |
| 179. |
Propulsion force of a rocket is____________________? |
| A. | non-conservative force |
| B. | conservative force |
| C. | both A and B |
| D. | none of these |
| Answer» B. conservative force | |
| 180. |
The source of geothermal energy is___________________? |
| A. | decay of radioactive element in the earth |
| B. | compression of material in the earth |
| C. | residual lost of the earth |
| D. | all as said in A – B and C |
| Answer» E. | |
| 181. |
Work done by the force of friction is____________________? |
| A. | always positive |
| B. | always negative |
| C. | positive only for small frictional force |
| D. | positive only for large frictional force |
| Answer» C. positive only for small frictional force | |
| 182. |
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ? |
| A. | 5000 nm |
| B. | 5000A |
| C. | 500m |
| D. | 2000um |
| Answer» C. 500m | |
| 183. |
Which of the following is not conservative force_________________? |
| A. | friction |
| B. | electric |
| C. | gravitational |
| D. | magnetic |
| Answer» B. electric | |
| 184. |
If velocity is doubled then__________________? |
| A. | momentum increases 4 times and K.E increases 2 times |
| B. | momentum and K.E. remain same |
| C. | momentum increases 2 times and K.E increases constant |
| D. | momentum increases 2 times and K.E increases 4 time |
| Answer» E. | |
| 185. |
On a clear day at noon the solar energy reaching the earth is ____________________? |
| A. | 1.44kw/m² |
| B. | 1.4kw/m² |
| C. | 1 kw/m² |
| D. | none |
| Answer» D. none | |
| 186. |
The dot product of force and velocity is__________________? |
| A. | power |
| B. | work |
| C. | impulse |
| D. | torque |
| Answer» B. work | |
| 187. |
A field in which the work done in a moving a body along closed path is zero is called________________? |
| A. | electric field |
| B. | conservative field |
| C. | electromagnetic field |
| D. | gravitational field |
| Answer» C. electromagnetic field | |
| 188. |
The source of tidal energy is____________________? |
| A. | sun |
| B. | earth |
| C. | both A and B |
| D. | moon |
| Answer» E. | |
| 189. |
When the speed of a moving body is doubled then___________________? |
| A. | its K.E is doubled |
| B. | its acceleration is doubled |
| C. | its P.E is doubled |
| D. | its momentum is doubled |
| Answer» E. | |
| 190. |
Work done will be maximum if the angle between the force F and displacement d is______________________? |
| A. | 45° |
| B. | 90° |
| C. | 180° |
| D. | 0° |
| Answer» E. | |
| 191. |
Gravitational P.E of a body has____________________? |
| A. | no formula |
| B. | a formula mgh only |
| C. | a formula |
| D. | no general formula |
| Answer» E. | |
| 192. |
The highest value of escape velocity in solar system is planet____________________? |
| A. | Earth |
| B. | Neptune |
| C. | Jupiter |
| D. | Moon |
| Answer» D. Moon | |
| 193. |
The ration stress to strain in youngs modulus of the material then tension is__________________? |
| A. | Directly proportional to extension |
| B. | Directly proportional to strain |
| C. | Directly proportional to square of amplitude |
| D. | Inversely proportional to extension |
| Answer» B. Directly proportional to strain | |
| 194. |
The tides raise the mater in the see roughly in a day___________________? |
| A. | once |
| B. | twice |
| C. | four time |
| D. | eight time |
| Answer» C. four time | |
| 195. |
________________ cells converts solar energy into electrical energy? |
| A. | rotory |
| B. | photovoltaic |
| C. | galvanic |
| D. | non of these |
| Answer» C. galvanic | |
| 196. |
The escape velocity of a body in gravitational field of earth is independent of__________________? |
| A. | its mass |
| B. | the angle at which it is thrown |
| C. | both its mass and the angle at which it is thrown |
| D. | gravitational field of earth |
| Answer» D. gravitational field of earth | |
| 197. |
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 | |
| 198. |
The consumption of energy by a 60 watt bulb in 2 sec is_________________? |
| A. | 120 J |
| B. | 60 J |
| C. | 30 J |
| D. | 0.02 J |
| Answer» B. 60 J | |
| 199. |
Formation of large molecule by joining small molecules is_________________? |
| A. | Fusion |
| B. | Polymerization |
| C. | Crystallization |
| D. | Subtraction |
| Answer» C. Crystallization | |
| 200. |
A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by_________________? |
| A. | Stress/strain |
| B. | (stress/strain) |
| C. | Stress x strain |
| D. | (Stress / strain) |
| Answer» E. | |