Physics-Objective Related Question Answers
501. Triode was invented by?
Lee De Forest
502. Element used in solar cells?
.Silicon
503. Materials whose conductivity lies between conductors and insulators '?
Semi conductors
504. Examples of semiconductors are?
Germanium; Silicon
505. Semi conductor in pure state is called?
Intrinsic Semiconductors
506. In intrinsic, number of holes is equal to' number of?
Electrons
507. The process to improve conductivity?
Doping
508. Process of adding controlled impurities to a pure semiconductor is known as?
Doping
509. The substances used for doping?
Dopants
510. An intrinsic semiconductor undergoes doping, change into?
Extrinsic semiconductor
511. Extrinsic are of two types:?
(1) N-type semiconductor (2) P-type semiconductor
512. In N-type, charge carriers are?
Electrons
513. The electronic device which has semiconducting property that allows current to flow in one direction?
Diode
514. Diode is mostly used to convert?
AC to DC
515. Diode is used as a?
Rectifier
516. Zener diode is used as?
Voltage regulator
517. A semiconductor device used to amplify or switch electronic signals and electrical . power?
Transistor
518. Three regions of a transistor?
Emitter; Base; Collector
519. Transistor transfers a signal from a low resistance to?
High resistance
520. Transistor was invented by?
John Bardeen; W.H. Brattain and William Shockley
521. Electronic intelligence is called?
ELINT
522. The circuits that act as transistors, diodes, resistors etc is called?
Integrated Circuits
523. 'IC' chips are made up of?
Silicon or Germanium
524. IC Chip was invented by?
Jack Kilby
525. IC chip using Silicon was invented by?
Robert Noyce
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