MCQOPTIONS
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MCQOPTIONS
This section includes 1134 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
The temperature of air varies during 24 hours of a day is an example of |
| A. | digital quantity |
| B. | analogue quantity |
| C. | discrete data |
| D. | none of above |
| Answer» C. discrete data | |
| 152. |
The branch of mathematics which deals with the relationships of logic variables is |
| A. | algebra |
| B. | geometry |
| C. | Boolean algebra |
| D. | logarithms |
| Answer» D. logarithms | |
| 153. |
The process of emission of electrons from hot metal surface is called |
| A. | electronic emission |
| B. | thermionic emission |
| C. | electron capture |
| D. | proton loss |
| Answer» C. electron capture | |
| 154. |
When anyone of inputs is at 1, the value of output of OR gate will be |
| A. | 2 |
| B. | 1 |
| C. | 3 |
| D. | 0 |
| Answer» C. 3 | |
| 155. |
The process of emission of electrons from the hot metal surfaces is called |
| A. | plastic emission |
| B. | thermionic emission |
| C. | static emission |
| D. | current emission |
| Answer» C. static emission | |
| 156. |
In a D.C motor the coil in a magnet rotates maximum to about |
| A. | 180 ° |
| B. | 150 ° |
| C. | 90 ° |
| D. | 50 ° |
| Answer» D. 50 ° | |
| 157. |
A transformer is designed to convert the voltage from 240 V a.c mains to 12 V, and has 4000 turns on its primary coil. If it is 100% efficient, and the current in the secondary coil was 0.4 A then the current in the primary coil should be |
| A. | 0.08 A |
| B. | 0.05 A |
| C. | 0.02 A |
| D. | 0.01 A |
| Answer» D. 0.01 A | |
| 158. |
The production of induced current in one coil due to production of current in neighboring coil is |
| A. | electromagnetism |
| B. | induction |
| C. | mutual induction |
| D. | steady current |
| Answer» D. steady current | |
| 159. |
The magnetic field produced near the current-carrying conductor is |
| A. | stronger |
| B. | weaker |
| C. | neutral |
| D. | none of above |
| Answer» B. weaker | |
| 160. |
The intensity level of the rustling of leaves is |
| A. | 25 dB |
| B. | 0 dB |
| C. | 10 dB |
| D. | 100 dB |
| Answer» D. 100 dB | |
| 161. |
Sound waves are |
| A. | Longitudinal |
| B. | Transverse |
| C. | Electromagnetic |
| D. | Only magnetic |
| Answer» B. Transverse | |
| 162. |
Old people can not hear sounds even above |
| A. | 5,000 Hz |
| B. | 15,000 Hz |
| C. | 10,000 Hz |
| D. | 8,000 Hz |
| Answer» C. 10,000 Hz | |
| 163. |
SONAR is the abbreviation of |
| A. | small navigation and random |
| B. | sky navigation and ranging |
| C. | sun nuclear ranging |
| D. | sound navigation and ranging |
| Answer» E. | |
| 164. |
Echoes maybe heard more than once due to |
| A. | multiple reflections |
| B. | single time reflection |
| C. | refraction |
| D. | diffraction of waves |
| Answer» B. single time reflection | |
| 165. |
Beta particles are stream of high energy |
| A. | electrons |
| B. | protons |
| C. | photons |
| D. | positrons |
| Answer» B. protons | |
| 166. |
The phenomenon by which radiations split matter into negative and positive ions is called |
| A. | ionization |
| B. | radiation |
| C. | transmutation |
| D. | radioactivity |
| Answer» B. radiation | |
| 167. |
The radiation emitted from the splits into |
| A. | 2 components |
| B. | 4 components |
| C. | 5 components |
| D. | 3 components |
| Answer» E. | |
| 168. |
The number of protons inside nucleus represents |
| A. | atomic mass |
| B. | atomic number |
| C. | atomic count |
| D. | radioactivity level |
| Answer» C. atomic count | |
| 169. |
Isotopes have same number of protons but different number of |
| A. | electrons |
| B. | neutrons |
| C. | shells |
| D. | positrons |
| Answer» C. shells | |
| 170. |
A cathode ray oscilloscope consists of |
| A. | The electron gun |
| B. | The deflecting plates |
| C. | A fluorescent screen |
| D. | all of above |
| Answer» E. | |
| 171. |
The cathode rays carry |
| A. | positive charge |
| B. | neutral |
| C. | negative charge |
| D. | positrons |
| Answer» D. positrons | |
| 172. |
The OR operation can be represented as |
| A. | X = A + B |
| B. | X = A x B |
| C. | X = A - B |
| D. | X = A ⁄ B |
| Answer» B. X = A x B | |
| 173. |
For OR operations switches should be connected in |
| A. | series combination |
| B. | series parallel combination |
| C. | parallel combination |
| D. | alternative combination |
| Answer» D. alternative combination | |
| 174. |
The force on the wire is at right angles to both the direction on the magnetic field and the direction of the current. This is discovered by |
| A. | Faraday |
| B. | Ampere |
| C. | Fleming |
| D. | Johns Burge |
| Answer» C. Fleming | |
| 175. |
Lenz devised a rule to find out the direction of |
| A. | current induced in a circuit |
| B. | electromagnetic difference |
| C. | potential difference |
| D. | flow of power in fuse |
| Answer» B. electromagnetic difference | |
| 176. |
If the secondary voltage is larger than the primary voltage, the transformer is called a |
| A. | positive transformer |
| B. | step-up transformer |
| C. | negative transformer |
| D. | step-down transformer |
| Answer» C. negative transformer | |
| 177. |
If we grasp a wire with right hand such that the thumb pointed in the direction of current, then the curling fingers of hand will point the |
| A. | current |
| B. | force acting |
| C. | magnetic field |
| D. | none of above |
| Answer» D. none of above | |
| 178. |
When the plane of the coil is perpendicular to the lines of magnetic force, the number of lines of magnetic force passing through the coil will be |
| A. | minimum |
| B. | maximum |
| C. | zero |
| D. | none of above |
| Answer» C. zero | |
| 179. |
The quantity which does not changes during refraction is |
| A. | direction |
| B. | speed |
| C. | frequency |
| D. | wavelength |
| Answer» D. wavelength | |
| 180. |
The nature of light is wave as well as particle, thus its nature is |
| A. | negative |
| B. | triple |
| C. | single |
| D. | dual |
| Answer» E. | |
| 181. |
The lens which is thin at center and thick at edges is |
| A. | convex lens |
| B. | biconvex lens |
| C. | biconcave lens |
| D. | concave lens |
| Answer» E. | |
| 182. |
The reflection by the rough surfaces is called |
| A. | regular reflection |
| B. | irregular reflection |
| C. | regular refraction |
| D. | irregular refraction |
| Answer» C. regular refraction | |
| 183. |
Light enters the eye through a transparent membrane known as |
| A. | cornea |
| B. | pupil |
| C. | retina |
| D. | iris |
| Answer» B. pupil | |
| 184. |
To find the speed of sound, we use the relation |
| A. | v = fλ |
| B. | f = vλ |
| C. | lambda = fv |
| D. | v = f + lambda; |
| Answer» B. f = vλ | |
| 185. |
The scale to measure the intensity level of sound is called |
| A. | vector scale |
| B. | measuring ruler |
| C. | bel scale |
| D. | decibel scale |
| Answer» E. | |
| 186. |
The speed of sound varies with |
| A. | humidity only |
| B. | temperature only |
| C. | pressure |
| D. | humidity and temperature |
| Answer» E. | |
| 187. |
The loudness and amplitude of sound varies |
| A. | directly |
| B. | inversely |
| C. | Not related |
| D. | proportionally |
| Answer» B. inversely | |
| 188. |
Sounds of frequency higher than 20,000 Hz which are inaudible to normal human ear are called |
| A. | noise |
| B. | frequency |
| C. | ultrasonic |
| D. | amplitude |
| Answer» D. amplitude | |
| 189. |
The area and loudness are |
| A. | inversely related |
| B. | directly related |
| C. | not related at all |
| D. | inversely proportional |
| Answer» C. not related at all | |
| 190. |
The loudness of sound is directly proportional to |
| A. | intensity |
| B. | area |
| C. | pitch |
| D. | log of intensity |
| Answer» E. | |
| 191. |
Astronauts in space communicate with each other by radio links because |
| A. | Sound waves travel slowly in space |
| B. | sound waves can't travel in space |
| C. | sound waves travel fast in space |
| D. | sound waves have low frequency |
| Answer» C. sound waves travel fast in space | |
| 192. |
Main sources of noise pollution are |
| A. | Transportation equipment only |
| B. | Heavy machinery only |
| C. | musical instruments |
| D. | Transportation equipment and heavy machinery |
| Answer» E. | |
| 193. |
Pitch of the sound depends upon |
| A. | frequency |
| B. | distance of sound |
| C. | amplitude |
| D. | temperature |
| Answer» B. distance of sound | |
| 194. |
Sound waves can be transmitted by any |
| A. | medium |
| B. | vacuum |
| C. | empty |
| D. | none of above |
| Answer» B. vacuum | |
| 195. |
The speed of sound in air depends on the |
| A. | chemical conditions |
| B. | Physical conditions |
| C. | pitch |
| D. | Area |
| Answer» C. pitch | |
| 196. |
Humans can hear sound up to the highest frequency of 20,000 Hz. If the wavelength of sound in air at this frequency at a temperature of 20° would be |
| A. | 5.7×10-2 |
| B. | 3.7×10-2 |
| C. | 1.7×10-2 |
| D. | 2.7×10-2 |
| Answer» D. 2.7×10-2 | |
| 197. |
The speed of sound in solids is |
| A. | 10 times that in gas |
| B. | 20 times that in gas |
| C. | 5 times that in gas |
| D. | 15 times that in gas |
| Answer» E. | |
| 198. |
A ship sends an ultrasound that returns from the seabed and is detected after 3.42 s. If the speed of the ultrasound through seawater is 1300 ms-1, then the distance of the seabed from the ship would be |
| A. | 3000 m |
| B. | 2600 m |
| C. | 2200 m |
| D. | 2800 m |
| Answer» C. 2200 m | |
| 199. |
In a market, the intensity level of sound recorded is 80 dB, the intensity level of sound should be |
| A. | 10-4Wm-2 |
| B. | 10-6Wm-2 |
| C. | 10-8Wm-2 |
| D. | 10-5Wm-2 |
| Answer» B. 10-6Wm-2 | |
| 200. |
When sound is incident on the surface of a medium it bounces back into the first medium. The phenomenon is called |
| A. | refraction of sound |
| B. | deflection of sound |
| C. | defraction of sound |
| D. | reflection of sound |
| Answer» E. | |