MCQOPTIONS
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MCQOPTIONS
This section includes 2016 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 1201. |
Transition ions absorb light in : |
| A. | nfrared region |
| B. | ltraviolet region |
| C. | icrowave region |
| D. | isible region |
| Answer» E. | |
| 1202. |
The device used for measuring the wavelength of X-rays is |
| A. | .M. Counter |
| B. | yclotron |
| C. | ragg Spectrometer |
| D. | ass Spectrometer |
| Answer» D. ass Spectrometer | |
| 1203. |
To measure the speed of an approaching car a police officer shines |
| A. | ight waves on it |
| B. | icrowaves on it |
| C. | adio waves on it |
| D. | ltra high frequency waves on it |
| Answer» D. ltra high frequency waves on it | |
| 1204. |
Ultra violet radiations of the Sun do not reach the earth because, earth's atmosphere is surrounded by |
| A. | arbon dioxide |
| B. | mmonia |
| C. | hlorine |
| D. | zone |
| Answer» E. | |
| 1205. |
The radiation initially produced in fluorescent tube is |
| A. | nfrared |
| B. | ltraviolet |
| C. | icrowaves |
| D. | -rays |
| Answer» C. icrowaves | |
| 1206. |
Forged documents are detected by |
| A. | ltraviolet rays |
| B. | nfra-red rays |
| C. | eta rays |
| D. | amma rays |
| Answer» B. nfra-red rays | |
| 1207. |
Nuclear Reactors are based on which of the following phenomenon? |
| A. | agnetic confinement of Plasma |
| B. | uclear Fusion |
| C. | ontrolled Nuclear Fission |
| D. | one of the above |
| Answer» D. one of the above | |
| 1208. |
The mercury and sodium street lamps light up because of : |
| A. | tomic emission |
| B. | tomic absorption |
| C. | lectron emission |
| D. | lectron absorption |
| Answer» B. tomic absorption | |
| 1209. |
The radiant energy having lowest energy is |
| A. | amma rays |
| B. | V rays |
| C. | isible light |
| D. | icrowave radiation |
| Answer» E. | |
| 1210. |
Radioactive elements can be traced out in living cell through a technique called |
| A. | entrifugation |
| B. | hromatography |
| C. | uto radiography |
| D. | ll the above |
| Answer» D. ll the above | |
| 1211. |
In nuclear reactor, heavy water is used as |
| A. | oolant |
| B. | uel |
| C. | oderator |
| D. | tomic smasher |
| Answer» D. tomic smasher | |
| 1212. |
Alpha particle is the nucleus of an atom of |
| A. | ithium |
| B. | ydrogen |
| C. | elium |
| D. | xygen |
| Answer» D. xygen | |
| 1213. |
In a nuclear reactor, one of the following is used as a fuel. |
| A. | oal |
| B. | ranium |
| C. | adium |
| D. | iesel |
| Answer» C. adium | |
| 1214. |
Choose the most appropriate answer: Natural radioactivity was discovered by |
| A. | arie Curie |
| B. | arnest Rutherford |
| C. | enry Bacquerel |
| D. | nrico Fermi |
| Answer» D. nrico Fermi | |
| 1215. |
What are the particles emitted by radioactive element after 3 consecutive disintegration? |
| A. | alpha 1 beta |
| B. | alpha 1 beta |
| C. | beta 1 alpha |
| D. | beta 2 alpha |
| Answer» D. beta 2 alpha | |
| 1216. |
Moving electric charge produces : |
| A. | agnetic field |
| B. | ound waves |
| C. | ight rays |
| D. | eat waves |
| Answer» B. ound waves | |
| 1217. |
The force between charged particles is called as: |
| A. | uclear Force |
| B. | ravitational Force |
| C. | entrifugal Force |
| D. | lectromagnetic Force |
| Answer» E. | |
| 1218. |
Which of the following supports particle nature of photons ? |
| A. | iffraction |
| B. | olarization |
| C. | hotoelectric effect |
| D. | nterference |
| Answer» D. nterference | |
| 1219. |
The threshold frequency is the frequency below which : |
| A. | hoto current increases with voltage |
| B. | hoto current decreases with voltage |
| C. | hoto electric emission is not possible |
| D. | hoto current is constant |
| Answer» D. hoto current is constant | |
| 1220. |
A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct? |
| A. | he wavelength of X-ray photon is less than the wavelength of visible radiation photon. |
| B. | oth the photons have different energies. |
| C. | he speeds of both the photons in vacuum are different |
| D. | he frequency of X-ray photon is higher than the frequency of visible radiation photon. |
| Answer» D. he frequency of X-ray photon is higher than the frequency of visible radiation photon. | |
| 1221. |
Night photography and photopraphy in mist and fog are possible using |
| A. | ltra-violet radiation |
| B. | nfra-red radiation |
| C. | icrowave radiation |
| D. | amma radiation |
| Answer» C. icrowave radiation | |
| 1222. |
Which of the following has the longest wavelength? |
| A. | nfrared radiation |
| B. | -ray radiation |
| C. | ltraviolet radiation |
| D. | isible radiation |
| Answer» B. -ray radiation | |
| 1223. |
Green house effect is the heating up of the Earth's atmosphere which is due to |
| A. | he ultraviolet rays |
| B. | -rays |
| C. | he infra-red rays |
| D. | -rays |
| Answer» D. -rays | |
| 1224. |
Gamma rays can cause |
| A. | ene mutation |
| B. | neezing |
| C. | urning |
| D. | ever |
| Answer» B. neezing | |
| 1225. |
Photon is the fundamental unit/quantum of |
| A. | ravitation |
| B. | lectricity |
| C. | agnetism |
| D. | ight |
| Answer» E. | |
| 1226. |
For photoelectric effect to take place, the metal used as the cathode should have ________ |
| A. | igh melting point |
| B. | ow melting point |
| C. | ow work function |
| D. | ow resistance |
| Answer» D. ow resistance | |
| 1227. |
The ''Choke' used with a tube light is basically |
| A. | n inductor |
| B. | capacitor |
| C. | transformer |
| D. | resistor |
| Answer» B. capacitor | |
| 1228. |
The frequency of direct current is ________ |
| A. | ero |
| B. | 0 HZ |
| C. | 0 HZ |
| D. | 00 HZ |
| Answer» B. 0 HZ | |
| 1229. |
The device which transfer the signal from low resistance region to high resistance region is |
| A. | iode |
| B. | ransistor |
| C. | apacitor |
| D. | nductor |
| Answer» C. apacitor | |
| 1230. |
Superconductors are those elements |
| A. | hose conductivity is intermediate between metals and insulators |
| B. | hose resistance falls almost to zero at very low temperatures |
| C. | hich turn into insulators at very low temperatures |
| D. | hich conduct electricity only at super-high temperatures |
| Answer» C. hich turn into insulators at very low temperatures | |
| 1231. |
An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct? |
| A. | e > Vp |
| B. | e < Vp |
| C. | e = Vp |
| D. | annot be determined |
| Answer» B. e < Vp | |
| 1232. |
The purpose of choke in a fluorescent lamp is : |
| A. | o increase the current flow |
| B. | o decrease the current flow |
| C. | o decrease the resistance |
| D. | o decrease the voltage momentarily |
| Answer» C. o decrease the resistance | |
| 1233. |
The device which converts AC to DC is |
| A. | scillator |
| B. | mplifier |
| C. | ectifier |
| D. | one of these |
| Answer» D. one of these | |
| 1234. |
Which of the following experiments analyzed the Fraunhofer lines of the solar spectrum? |
| A. | arkla's experiment on scattering of X-rays |
| B. | amb-Rutherford experiment |
| C. | eiger and Marsdens experiment on scattering of alpha particles |
| D. | unsen and Kirchhoff's experiment |
| Answer» E. | |
| 1235. |
A wire carrying current is |
| A. | ositively charged |
| B. | egatively charged |
| C. | eutral |
| D. | harged with a type depending upon current strength |
| Answer» D. harged with a type depending upon current strength | |
| 1236. |
Which of the following was the first theory of superconductivity? |
| A. | inzburg Landau theory |
| B. | ondon theory |
| C. | esonating valence bond theory |
| D. | uantum field theory |
| Answer» C. esonating valence bond theory | |
| 1237. |
Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. |
| A. | uperconductors |
| B. | emi conductors |
| C. | ielectrics |
| D. | erfect conductors |
| Answer» B. emi conductors | |
| 1238. |
Super conductors are substances that |
| A. | ffer minimum resistance to flow of electric current |
| B. | onduct electricity at low temperature |
| C. | onduct electricity at high temperature |
| D. | ffer high resistance to the flow of electric current |
| Answer» B. onduct electricity at low temperature | |
| 1239. |
Kirchoff's Voltage Law is known as |
| A. | onservation of Charge |
| B. | onservation Energy |
| C. | oth |
| D. | one of these |
| Answer» C. oth | |
| 1240. |
Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength. |
| A. | icrowave, infrared, visible. X-rays |
| B. | -rays, visible, infrared, microwave |
| C. | isible, infrared, microwave, X-rays |
| D. | - rays, infrared, visible, microwave |
| Answer» E. | |
| 1241. |
Remote-sensing device has an inbuilt source of |
| A. | -ray |
| B. | -ray |
| C. | ltraviolet ray |
| D. | nfrared ray |
| Answer» E. | |
| 1242. |
Ozone layer above the surface of Earth provides a shield against |
| A. | -rays |
| B. | ltra-violet rays |
| C. | amma rays |
| D. | nfra-red rays |
| Answer» C. amma rays | |
| 1243. |
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ? |
| A. | isible |
| B. | nfrared |
| C. | ltraviolet |
| D. | -ray |
| Answer» D. -ray | |
| 1244. |
What is the unit of Magnetic Induction? |
| A. | hm |
| B. | arad |
| C. | olt |
| D. | enry |
| Answer» E. | |
| 1245. |
Planck's constant has the dimensions of : |
| A. | nergy |
| B. | inear momentum |
| C. | ngular momentum |
| D. | orce |
| Answer» B. inear momentum | |
| 1246. |
An Electric generator is based on which of the following scientific principles? |
| A. | araday's law of Electromagnetic Induction |
| B. | uper Conductivity |
| C. | aws of Thermodynamics |
| D. | ewton's Law of Motion |
| Answer» B. uper Conductivity | |
| 1247. |
In the remote control of television, electromagnetic waves used are |
| A. | ltraviolet |
| B. | icrowave |
| C. | adiowave |
| D. | nfrared |
| Answer» E. | |
| 1248. |
The waves used in sonography are |
| A. | icro waves |
| B. | nfra-red waves |
| C. | ound waves |
| D. | ltrasonic waves |
| Answer» E. | |
| 1249. |
Ozone layer in the outer atmosphere helps us in |
| A. | eflecting radio waves and makes radio communication possible |
| B. | egulating the temperature of atmosphere |
| C. | bsorbing cosmic ray particles |
| D. | bsorbing UV radiations |
| Answer» E. | |
| 1250. |
Who among the following discovered X-rays? |
| A. | arie Curie |
| B. | .J Thomson |
| C. | .C Roentgen |
| D. | ames Chadwick |
| Answer» D. ames Chadwick | |