Tag: scientist and their achievements

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Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

He was a professor of mathematics at St. Petersburg University, Prof. of anatomy and physics at the University of Groningen, and prof. of physics, anatomy and botany at the University of Basle. But he is most famous for what is known as 'Bernouilli's theorem'. Name the outstanding mathematician- of a well-known Swiss family.

  1. Johann Bernouilli

  2. Jacob Bernouilli

  3. Danial Bernouilli

  4. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Daniel Bernouilli has given the most famous Bernouilli theorem in field of fluid mechanics.

Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

Astronomers have discovered a bizarre, hexagon-shaped feature in the clouds of Saturn near the planet's north pole. The feature was first seen in images sent by the

  1. Voyager spacecraft

  2. Casis spacecraft

  3. Messenger spacecraft

  4. Pathfinder spacecraft
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The hexagonal feature at Saturn's north pole was first observed by the Voyager 1 and 2 spacecraft during their flybys in the early 1980s, and later confirmed by the Cassini mission.

Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

In a microwave oven the device used for generating microwaves is

  1. Stirrer fan

  2. Metal wall

  3. Magnetron

  4. Cyclotron
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A magnetron is a high-powered vacuum tube that generates microwaves by interacting a stream of electrons with a magnetic field, which is the core component of a microwave oven.

Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

Which of the following is/are the source/s of ultraviolet radiations?

  1. The sun

  2. Electric arcs of mercury

  3. Discharges in hydrogen

  4. All of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultraviolet radiation is emitted by the sun, as well as by artificial sources like mercury vapor lamps and electric arcs used in industrial processes.

Multiple choice physics scientists inventions and inventors in science indian scientist: biography and achievements scientist and their achievements

The output of a given windmill

  1. Increases with an increase in wind velocity

  2. Decreases with an increase in wind velocity

  3. Is independent of wind velocity

  4. Cannot be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The power output of a windmill is proportional to the cube of the wind velocity. Therefore, as wind velocity increases, the energy captured and the output of the windmill increase significantly.