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Quiz 10
Mdcat-past-papers - ETEA Quiz
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Board: ETEA |
181. The current produced by a generator is called:
Direct current
Pulsating current
Alternating current
Variable current
182. Low voltage levels in an electrical circuit is called:
Voltage regulator
Capacitor
Capacitor
Transformer
183. The direction of induced current is determined by?
Ampere's law
Capacitor
Faraday's law
Transformer
184. Lenz's law is consistent with the:
Ampere's law
Law of conservation of energy
Faraday's law
Ohm's law
185. The basic principle behind the operation of the transformer is:
Coulomb's law
Gas's law
Electromagnetic Induction
Hess's law
186. Output current of a half wave rectifier is:
AC current
Unidirectional
Zero always
Straight line (vertical axis)
187. The resistance of full wave rectifier is:
Less than half wave
More than half wave
Equal to half wave
Negligible compared to half wave
188. When AC is converted to DC, the process is called:
Magnification
Amplification
Rectification
Resolution
189. The primary purpose of rectification in an electrical circuit is to:
Convert DC to AC
Smooth voltage fluctuations
Amplify signals
Convert AC to DC (one direction)
190. The half life of a radioactive sample predicts about:
Whole life of sample
Disintegration time of half number of atoms
Decay only
Total time for stable atoms
191. Radioactivity does not depend upon:
Initial number of atoms
Temperature
Nature of material
Time
192. The radiation emitted by warm-blooded animals lies in the region of:
Visible
Ultraviolet
Infrared
X-rays
193. An electron will have maximum kinetic energy when it has:
Long wavelength
Short wavelength
Low frequency
Circular motion
194. At the end of 14 minutes, 1/16 of a sample of radioactive polonium remains. The corresponding half-life is:
7/8 min
8/7 min
7/4 min
7/2 min
195. λ is ……………..constant
Decay
Dielectric
Planck's
Proportionality
196. Mass number A refers to:
Number of electrons
Number of neutrons
Number of nucleons
Number of protons
197. Which one is a stable element among the following?
Lead
Plutonium
Radium
Protactinium
198. Which photon is travelling with the largest speed in vacuum?
Gamma photon
Visible light photon
Infrared
All photons move with speed of light
199. The Decay constant of Na is 0.0000128 /s, the half life of Na is ?
15 Hours
5 Hours
900 Sec
3600 Sec
200. Which one is not the unit of radioactivity?
Becquerel
Decay/second
Tesla/m
Curie
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