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.
| 251. |
The process in which two light nuclei combine to form a heavy nucleus is called |
| A. | fusion reaction |
| B. | fission reaction |
| C. | radioactivity |
| D. | transmutation |
| Answer» B. fission reaction | |
| 252. |
The lifetime of unstable nuclei is |
| A. | limited |
| B. | unlimited |
| C. | 100 years |
| D. | 50 years |
| Answer» C. 100 years | |
| 253. |
The greatest ionization power is possessed by |
| A. | beta particles |
| B. | gamma particles |
| C. | neutrons |
| D. | alpha particles |
| Answer» E. | |
| 254. |
The number of protons in the nucleus is called |
| A. | neutron number (N) |
| B. | atomic number (Z) |
| C. | atomic mass number (A) |
| D. | electron number (E) |
| Answer» B. atomic number (Z) | |
| 255. |
(1/focal length in meters) is equal to |
| A. | diameter of a lens |
| B. | weakness of a lens |
| C. | power of a lens |
| D. | quality of lens |
| Answer» D. quality of lens | |
| 256. |
The word atom is derived from the Greek word |
| A. | antimum |
| B. | atomis |
| C. | otomos |
| D. | optium |
| Answer» D. optium | |
| 257. |
In the air, the alpha particle has a range of several |
| A. | centimeters |
| B. | thousand meters |
| C. | hundred meters |
| D. | meters |
| Answer» D. meters | |
| 258. |
The temperature at the center of the sun is |
| A. | 50 million kelvin |
| B. | 20 million kelvin |
| C. | 30 million kelvin |
| D. | 40 million kelvin |
| Answer» C. 30 million kelvin | |
| 259. |
The process of emission of natural radiation from some elements is called |
| A. | radioactivity |
| B. | degeneracy |
| C. | transmutation |
| D. | radio transmutation |
| Answer» B. degeneracy | |
| 260. |
A charge in the electric field always |
| A. | moves from lower potential to higher potential |
| B. | moves from higher potential to lower potential |
| C. | stay at higher potential |
| D. | stay at lower potential |
| Answer» C. stay at higher potential | |
| 261. |
The lines of the electric field were introduced by |
| A. | Newton |
| B. | Michael Faraday |
| C. | John burges |
| D. | Henry Pascal |
| Answer» C. John burges | |
| 262. |
The electron in a hydrogen atom experiences an electric field from the atom's nucleus in the order of |
| A. | 1012 NC-1 |
| B. | 1011 NC-1 |
| C. | 1015 NC-1 |
| D. | 108 NC-1 |
| Answer» C. 1015 NC-1 | |
| 263. |
By using electroscope, if the body is negatively charged then due to electrostatic induction, then on the disk there will be appear |
| A. | both positive and negative charges |
| B. | negative charge |
| C. | positive charge |
| D. | no charge |
| Answer» D. no charge | |
| 264. |
The study of charges at rest is called |
| A. | chemical electricity |
| B. | heat electricity |
| C. | static electricity |
| D. | mechanical electricity |
| Answer» D. mechanical electricity | |
| 265. |
The fast-moving light photons are |
| A. | alpha radiation |
| B. | gamma radiation |
| C. | beta radiations |
| D. | no radiations |
| Answer» C. beta radiations | |
| 266. |
The number of neutrons in the nucleus is called |
| A. | neutron number (N) |
| B. | atomic number (Z) |
| C. | atomic mass number (A) |
| D. | electron number (E) |
| Answer» C. atomic mass number (A) | |
| 267. |
A compound containing some amount of radioisotope is |
| A. | tracer |
| B. | radioactive compound |
| C. | non radioactive |
| D. | linear active compound |
| Answer» B. radioactive compound | |
| 268. |
Most of the nuclei with atomic number 1 to 82 are |
| A. | positive nuclei |
| B. | negative nuclei |
| C. | unstable nuclei |
| D. | stable nuclei |
| Answer» E. | |
| 269. |
If a radioactive element has a half-life of 40 minutes. The initial count rate was 1000 per minute, then how long will it take for the count rate to drop to 125 per minutes |
| A. | 120 minutes |
| B. | 90 minutes |
| C. | 30 minutes |
| D. | 60 minutes |
| Answer» B. 90 minutes | |
| 270. |
A process in which heavy nucleus splits into two by bombarding a slow-moving neutron is called |
| A. | radioactivity |
| B. | nuclear fusion |
| C. | nuclear fission |
| D. | nuclear splitting |
| Answer» D. nuclear splitting | |
| 271. |
The radiation which primarily consists of protons, electrons, alpha particles, and large nuclei are called |
| A. | environmental radiations |
| B. | background radiations |
| C. | positive radiations |
| D. | cosmic radiations |
| Answer» E. | |
| 272. |
The radiation which strongly interacts with the matter due to its charge and has a short-range as compared to gamma radiations is |
| A. | alpha radiation |
| B. | beta radiation |
| C. | no radiation |
| D. | gamma radiation |
| Answer» C. no radiation | |
| 273. |
In fission, the mass of products is |
| A. | less than original nucleus |
| B. | more than original nucleus |
| C. | equal to original nucleus |
| D. | all of above |
| Answer» B. more than original nucleus | |
| 274. |
An object 12 cm in front of a convex mirror forms an image 6 cm behind the mirror. The focal length of the mirror is |
| A. | −10 cm |
| B. | −14 cm |
| C. | −12 cm |
| D. | −15 cm |
| Answer» D. −15 cm | |
| 275. |
The inner part of the fiber optics which carries light is called |
| A. | prism |
| B. | cladding |
| C. | core |
| D. | diopters |
| Answer» D. diopters | |
| 276. |
The speed of light in water is approximately |
| A. | 2.3 × 108 m s-1 |
| B. | 3.3 × 108 m s-1 |
| C. | 2.3 × 105 m s-1 |
| D. | 4.3 × 108 m s-1 |
| Answer» B. 3.3 × 108 m s-1 | |
| 277. |
The angle of reflection and the angle of reflection are |
| A. | both negative |
| B. | not equal |
| C. | equal |
| D. | opposite |
| Answer» D. opposite | |
| 278. |
The speed of light in glass is approximately |
| A. | 3.0 × 108 m s-1 |
| B. | 2.3 × 108 m s-1 |
| C. | 2.0 × 108 m s-1 |
| D. | 2.6 × 105 m s-1 |
| Answer» D. 2.6 × 105 m s-1 | |
| 279. |
In the critical angle, some of the light escape the fiber optics and is lost, if the angle of incidence with cladding is |
| A. | less |
| B. | high |
| C. | equal |
| D. | zero |
| Answer» B. high | |
| 280. |
1 GB is equal to |
| A. | 1250 megabytes |
| B. | 1296 megabytes |
| C. | 1150 megabytes |
| D. | 1024 megabytes |
| Answer» E. | |
| 281. |
The temporary memory of computer is |
| A. | ROM |
| B. | secondary memory |
| C. | primary memory |
| D. | RAM |
| Answer» E. | |
| 282. |
The method used to transfer information to far off places instantly is called |
| A. | information technology |
| B. | language |
| C. | data |
| D. | telecommunication |
| Answer» E. | |
| 283. |
A small storage device that can be used to transport files from one computer to another is called |
| A. | flash drive |
| B. | floppy disk |
| C. | hard disk |
| D. | compact disc |
| Answer» B. floppy disk | |
| 284. |
The scientific method to store information, to arrange it for the proper use and to communicate it to others is called |
| A. | miscommunication |
| B. | telecommunication |
| C. | information technology |
| D. | electromagnetic communication |
| Answer» D. electromagnetic communication | |
| 285. |
As compared to the fiber optics used in a single-mode cable, each optical fiber is a multi-mode cable is about |
| A. | 5 times thicker |
| B. | 15 times thicker |
| C. | 20 times thicker |
| D. | 10 times thicker |
| Answer» E. | |
| 286. |
The group of cells forms a |
| A. | data |
| B. | cluster |
| C. | cathode rays |
| D. | electric signals |
| Answer» C. cathode rays | |
| 287. |
The scientific methods and means to store, process and transmit vast amounts of information in seconds with the help of electronic equipment is called |
| A. | information technology |
| B. | mass technology |
| C. | biotechnology |
| D. | information and communication technology |
| Answer» E. | |
| 288. |
Most of the data transferred through the internet are carried by |
| A. | light |
| B. | heat |
| C. | sound |
| D. | em waves |
| Answer» B. heat | |
| 289. |
If gm = ge ⁄ 6, the time period of a simple pendulum is 2s and ge = 10ms-2. The length of the pendulum on the moon will be |
| A. | 2 m |
| B. | 1 m |
| C. | 0.17 m |
| D. | 2.5 m |
| Answer» D. 2.5 m | |
| 290. |
The bending of waves around the corners of slits is called |
| A. | Reflection |
| B. | Refraction |
| C. | diffraction |
| D. | Deflection |
| Answer» D. Deflection | |
| 291. |
In one second, a human eardrum can oscillate back and forth up to |
| A. | 30,000 times |
| B. | 10,000 times |
| C. | 25,000 times |
| D. | 20,000 times |
| Answer» E. | |
| 292. |
In a vacuum, all electromagnetic waves have the same |
| A. | frequency |
| B. | speed |
| C. | wavelength |
| D. | amplitude |
| Answer» C. wavelength | |
| 293. |
The method of transfer energy is |
| A. | conduction |
| B. | radiation |
| C. | wave motion |
| D. | all of above |
| Answer» E. | |
| 294. |
Coulomb is equal to the charge of |
| A. | 8.25×1018 |
| B. | 6.25×1018 |
| C. | 7.25×1018 |
| D. | 5.25×1018 |
| Answer» C. 7.25×1018 | |
| 295. |
In equation Q=CV, C is the constant of proportionality called the capacitor's |
| A. | power |
| B. | capacitance |
| C. | heat |
| D. | electric intensity |
| Answer» C. heat | |
| 296. |
The charge on capacitor plates is directly proportional to |
| A. | current |
| B. | electric field intensity |
| C. | potential difference |
| D. | resistance |
| Answer» D. resistance | |
| 297. |
3 capacitors with capacitances 5µF, 6µF and 7µF are arranged in parallel combination with a battery of 5V, as 1µF = 10-6F, the voltage across each capacitor is |
| A. | 15V |
| B. | 5V |
| C. | 18V |
| D. | 20V |
| Answer» C. 18V | |
| 298. |
1 picofarad (1pF) is equal to |
| A. | 1×10-9F |
| B. | 1×10-12F |
| C. | 1×10-6F |
| D. | 1×10-10F |
| Answer» C. 1×10-6F | |
| 299. |
The term software refers to |
| A. | computer manuals only |
| B. | computer programs only |
| C. | machinery |
| D. | computer manuals and programs |
| Answer» E. | |
| 300. |
To send the sound waves to far off areas, they are converted to |
| A. | radio waves |
| B. | frequency |
| C. | microwaves |
| D. | electromagnetic waves |
| Answer» E. | |