Electron | MCQs

Explanation

The Atanasoff–Berry computer was the first automatic electronic digital computer.

Limited by the technology of the day, and execution, the device has remained somewhat obscure.

Explanation

ENIAC, in full Electronic Numerical Integrator and Computer, the first programmable general-purpose electronic digital computer.

ENIAC was completed in 1945 and first put to work for practical purposes on December 10, 1945.

Explanation

An integrated circuit  is a set of electronic circuits on one small flat piece  of semiconductor material, usually silicon.

Large numbers of tiny MOSFETs  integrate into a small chip.

First generation  (1940 - 1956) vacuum tubes as a major piece of technology.

The  ENIAC  is an example of 1st generation computer.

Second generation (1956 - 1963) use of transistors .

Third generation (1964 - 1971) use of  Integrated circuits.

Explanation

He will buy a new camera

وہ نیا کیمرہ خریدے گا۔

Passive voice: A new camera will be bought by him

Explanation

A computer works by electrical signals.

"By" is used to indicate the means or method by which the action is performed

Explanation

In a colour-television tube, three electron guns (red, green, and blue) fire electrons toward the phosphor-coated screen.

Explanation

The nucleus, which consists of protons and neutrons.

It is incredibly dense and occupies a very small volume compared to the extra-nuclear part (electrons).

However, the nucleus contains most of the atom's mass due to the significant mass of protons and neutrons.

Explanation

A cathode ray is a stream of electrons that are emitted from a cathode (negative electrode) in a vacuum tube.

These electrons carry a negative charge, as they are negatively charged particles.

Explanation

Electronics comprises the:

• Physics: Study of electrons, semiconductors, and electronic behavior.
• Engineering: Design, development, and testing of electronic systems and devices.
• Technology: Application of electronic principles to create devices, circuits, and systems.

Explanation

A filament is a thin wire, typically made of tungsten, that is heated to produce a continuous flow of electrons.

When an electric current is passed through the filament, it heats up and releases electrons, creating a steady stream of electrons.

This principle is used in various devices such as vacuum tubes, cathode ray tubes (CRTs), and electron microscopes.