1st PUC Electronics Question Bank Chapter 1 Introduction to Electronics

Karnataka 1st PUC Electronics Question Bank Chapter 1 Introduction to Electronics

One Mark Questions and Answers

Question 1.
What are electronics
Answer:
Electronics is the field of science and engineering which deals with electronic devices and their utilisation.

Question 2.
Who discovered the electron?
Answer:
J.J. Thomson.

Question 3.
Who invented the vacuum tube diode?
Answer:
John Ambrose Fleming.

Question 4.
Who invented the vacuum tube triode?
Answer:
Lee de Forest.

Question 5.
Name the most commonly used semiconductor material in device fabrications.
Answer:
Silicon.

Question 6.
How many electrodes are present in a vacuum tube triode?
Answer:
Three electrodes.

Question 7.
Who invented the transistor?
Answer:
William Shockley, John Bardeen, and Walter Brattain.

Question 8.
Who invented the integrated circuit?
Answer:
Jack Kilby.

Question 9.
In which year Op amp was developed?
Answer:
1964

Question 10.
What is the internet?
Answer:
Internet is the largest and the most effective communication platform.

Question 11.
Who invented JFET?
Answer:
William Schooley.

Question 12.
Expand MOSFET.
Answer:
Metal Oxide Semiconductor Field Effect Transistor.

Question 13.
Expand RAM.
Answer:
Random Access Memory.

Question 14.
Expand PROM.
Answer:
Programmable Read-Only Memory.

Question 15.
Expand SCR.
Answer:
Silicon Controlled Rectifier.

Question 16.
Expand IGBT.
Answer:
Insulated gate bipolar transistor.

Question 17.
What are voltage controllers?
Answer:
The circuits that control the voltage are called Voltage controllers.

Question 18.
What are rectifiers?
Answer:
Rectifiers are circuits that convert ac into varying dc.

Question 19.
What is an Integrated circuit?
Answer:
The integrated circuit is an entire electronic circuit on a single semiconductor chip.

Question 20.
Expand VLSI.
Answer:
Very large scale integration.

Question 21.
Name one application of op-amp.
Answer:
Addition of voltages.

Question 22.
What is a microprocessor?
Answer:
It is an integrated circuit that consists of CPU, Control Unit, data and address buses.

Question 23.
What is a microcontroller?
Answer:
A microcontroller is a computer on chip because it has CPU, memory, input and output pins, timer and clock circuit, all built on a single silicon chip.

Question 24.
When was the microcontroller invented?
Answer:
1971.

Question 25.
Who developed the first microprocessor?
Answer:
Ted Hoff of Intel Corporation.

Question 26.
Who developed the first microcontroller?
Answer:
Gary Boone and Michael Cochran.

Question 27.
Expand FM.
Answer:
Frequency modulation.

Question 28.
Expand WAN.
Answer:
Wide area network.

Question 29.
Expand EPRAM.
Answer:
Erasable Programmable read-only memory.

Two Mark Questions and Answers

Question 1.
Name two semiconducting materials used in device fabrication.
Answer:
Silicon and Germanium

Question 2.
Mention a few applications of electronics.
Answer:

1. Entertainment.
2. Communication
3. Defence applications.
4. Industrial applications
5. Medical applications.

Question 3.
Name any two medical electronic equipment.
Answer:
Glucometer and Sphygmomanometer.

Question 4.
List the household electronics, equipment.
Answer:
TV, DVD player, Microwave oven, Digital camera.

Question 5.
Mention a few applications of the Internet.
Answer:
The Internet provides several applications like World wide web, e-mail, e-commerce, chat, teleconference and telemedicine.

Question 6.
Distinguish between microprocessor and microcontroller.
Answer:
The microprocessor is an integrated circuit that consists of a CPU, control unit, data and address buses.
The microcontroller is a microprocessor with built-in memory like RAM and ROM.

Question 7.
Name few power semiconductor devices.
Answer:
Power diode, power transistor, SCR, TRIAC, MOSFET and IGBT (Insulated gate bipolar transistor).

Question 8.
Write the applications of a cell phone.
Answer:
A cell phone is used in many applications like text messaging, gaming, music, banking, the internet, e-mail, Global positioning system (GPS).

Question 9.
Write a note on the role of electronics in medical science.
Answer:
Electronic devices are widely used in medical science in the diagnosis and treatment of different ailments. The electronic devices commonly used in the field of medical science are
Electrocardiographs (ECG),.X-rays, ultrasound scanning machines, endoscopy, glucometer,

Question 10.
Write a brief note on the industrial applications of electronics.
Answer:
Industries have used electronics in systems that control production equipment like industrial robots and controlled machine tools. Many risky and life-threatening jobs are now performed by robots. Automation in the industry has reduced human labour, increased safety and productivity. Electronic fire detector, burglar alarms, smoke detectors and CC camera provide security to industries. Power stations generating electricity are controlled by electronic devices and circuits.

Question 11.
Discuss the applications of electronics in defence.
Answer:
In defence, Radar, Sonar and infrared systems are used to detect and locate warships, jet fighters and submarines. Missiles controlled by electronic signals can target enemies very accurately over long distances. Electronic security systems are used across the border to guard the country.

Question 12.
What are job opportunities available in the field of Electronics?
Answer:
Electronics engineers are employed in the design and development of complex devices and systems for signal processing and telecommunication in defence, space and other large research organisations.

Electronics engineers find job opportunities in the design and fabrication of devices, integrated circuits, embedded systems. Electronics technicians have jobs in the installation and maintenance of electronic equipment used in health care in hospitals, equipment for instruments.

1st PUC Electronics Question Bank with Answers