Additional Questions - Chapter 11 Recent Developments in Physics 12th Science Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

Updated On May 15, 2024

By SaraNextGen

Additional Questions
Multiple ChoiceQuestions
Question 1.
An automatic apparatus or device that performs functions ordinarily ascribed to human or operate with what appears to be almost human intelligence is called
(a) Robot
(b) Human
(c) Animals
(d) Reptiles.
Answer:
(a) Robot.
Question 2.
The laws of Robotics are
(a) a robot may not injure a human being
(b) a robot must obey the order given by human
(c) a robot must protect its own existence
(d) both $\mathrm{b}$ and $\mathrm{c}$.
Answer:
(d) both $\mathrm{b}$ and $\mathrm{c}$.
Hint:
A robot may not injure a human being or through in action, allow human being to be harmed.
Question 3.
The basic components of robot are
(a) mechanical linkage
(b) sensors and controllers
(c) user interface and power conversion unit
(d) All the above.
Answer:
(d) All the above.
Question 4.
What is the name for information sent from robot sensors to robot controllers

(a) temperature
(b) pressure
(c) feedback
(d) signal.
Answer:
(c) feedback
Question 5.
Which of the following uses radio frequency to produce nano - particles
(a) Plasma arching
(b) Chemical vapour deposition
(c) Sol-gel technique
(d) Electro deposition.
Answer:
(a) Plasma arching
Question 6.
Which of the following the atoms do not move from each other
(a) Shape memory alloys
(b) Nano materials
(c) Dielectrics
(d) Static materials.
Answer:
(b) Nano materials
Question 7.
The diameter of the nano wire is about
(a) $10^{-6} \mathrm{~m}$
(b) $10^{-3} \mathrm{~m}$
(c) $10^{-8} \mathrm{~m}$
(d) $10^{-9} \mathrm{~m}$.
Answer:
(d) $10^{-9} \mathrm{~m}$.

Question 8.
A suspended nano wire is a wire that is produced in
(a) Air medium
(b) Vaccum
(c) Low vaccum chamber
(d) High vaccum chamber.
Answer:
(d) High vaccum chamber.
Question 9.
For nano metres whose diameters less than ............................ are used as welding purposes.
(a) $10 \mathrm{~nm}$
(b) $20 \mathrm{~nm}$
(c) $30 \mathrm{~nm}$
(d) $40 \mathrm{~nm}$.
Answer:
(a) $10 \mathrm{~nm}$
Question 10.
Nano wires are used in
(a) $10 \mathrm{~nm}$
(b) Resistors
(c) Capacitors
(d) Transducers.
Answer:
(a) $10 \mathrm{~nm}$
Question 11.
Generally what is the material of needle electrodes
(a) Stainless steel
(b) Copper
(c) Lead
(d) Iron.
Answer:
(a) Stainless steel
Question 12.

.................. introduced is used to hold patients head and guide the placements of electrodes.
(a) Monotaxic
(b) Stereotonic
(c) Stereotaxic
(d) Monotonic.
Answer:
(c) Stereotaxic
Question 13.
Who is the father of the modem robotics industry formed the world's first robotic company in 1956
(a) Joliot
(b) Cormark
(c) Engelberger
(d) Edward purcell.
Answer:
(c) Engelberger
Question 14.
In 1954, .....................invented the first digitally operated programmable robot called unimate.
(a) Edward purcell
(b) George Devol
(c) Engel berger
(d) Joliot.
Answer:
(b) George Devol

Question 15.
The phenomenon of artificial radioactivity was invented by
(a) Joliot and Irene curie
(b) Felix Bloch and Edward purcell
(c ) Connack and Hounsfield
(d) Wilhelm conrad - Rontgen.
Answer:
(a) Joliot and Irene curie
Short AnswerQuestion
Question 1.
What is physics?
Answer:
Physics is the basic building block for Science, Engineering, Technology and Medicine.
Question 2.
Write down the applications of Nano technology?
Answer:
- Energy storage
- Metallurgy and materials
- Optical engineering and communication
- Agriculture and food
- Biotechnology
- Defense and security Electronics
- Biomedical and drug delivery
- Cosmetics and paints
- Textile.

Question 3.
What is robotics?
Answer:
Robotics is an integrated study of mechanical engineering, electronic engineering, computer engineering, and science.
Question 4.
What is meant by 'Robot'? Write its uses?
Answer:
Robot is a mechanical device designed with electronic circuitry and programmed to perform a specific task. These automated machines are highly significant in this robotic era where they can take up the role of humans in certain dangerous environments that are hazardous to people like defusing bombs, finding survivors in unstable ruins, and exploring mines and shipwrecks.
Question 5.
What is the meaning of particle physics?
Answer:
Particle physics deals with the theory of fundamental particles of nature and it is one of the active research areas in physics. Initially it was thought that atom is the fundamental entity of matter.
Question 6.
Define cosmology?
Answer:
Cosmology is the branch that involves the origin and evolution of the universe. It deals with formation of stars, galaxy etc.