What is the purpose of a transistor in electronic circuits?

• To regulate voltage

• To store data

• To filter noise

• To amplify or switch electronic signals

Which type of semiconductor device acts as a one-way valve for electric current?

• Diode

• Inductor

• Transistor

• Capacitor

To show that lightning was indeed electrical, this scientist flew a kite during a storm, to which he had attached a key. When the kite was struck by lightning, he felt electric sparks from the key.

• Albert Einstein

• Isaac Newton

• Leonardo da Vinci

• Benjamin Franklin

My inventions made it possible for people to enjoy the benefits of electricity. My most famous invention is the lightbulb.

• Alessandro Volta

• Nikola Tesla

• Thomas Edison

• Albert Einstein

I specialise in working with electricity. I am most known for designing the AC (alternating current electric system) which we still use today. My inventions have paved the way to many of today’s essential technology such as remote controls, radio, wireless technology, etc.

• Nikola Tesla

• Alexander Graham Bell

• Michael Faraday

• 
  Marie Curie

He invented the first thermionic valve, also known as the Fleming valve or diode, in 1904

• Lee de Forest

• Alessandro Volta

• Nikola Tesla

• John Ambrose Fleming

He is an American electrical engineer most famous for his invention of the integrated circuit (IC).

• Jack Kilby

• John Fleming

• James Watt

• Alexander Graham Bell

In 1906 he invented the Audion, the first triode vacuum tube developed from it founded the field of electronics and dominated it for 40 years, making possible radio broadcasting, television, and long distance telephone service, among many other applications.

• Francois Jean Arago

• Lee de Forest

• Karl Ferdinand Braun

• John Bardeen

An American entrepreneur and engineer, known for his roles with Tesla and SpaceX, as well as his involvement in ventures like Neuralink and The Boring Company.

• Mark Zuckerberg

• Reed Hoffman

• Mary Meeker

• Elon Musk

Karl Braun is best known for his invention of the first ___________ (an electronic instrument that displays changes in the voltage of an electric circuit) made out of a cathode-ray tube (CRT)

• Telescope

• Oscilloscope

• Function Generator

• Stethoscope