Jagran Josh Science Quiz

2.

What was the active medium used in the first working laser ever constructed?

A diamond block
Helium-neon gas
A ruby rod
Carbon dioxide gas

Correct Answer

A. A ruby rod

Explanation

The first working laser ever constructed used a ruby rod as its active medium. The ruby rod is a cylindrical piece of synthetic ruby that is doped with chromium ions. When energy is applied to the ruby rod, the chromium ions become excited and emit light. This light then bounces back and forth within the rod, reflecting off the ends, and amplifying to create a coherent beam of laser light. The use of a ruby rod as the active medium allowed for the production of a focused and intense laser beam.

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3.

What does AC and DC stand for in the electrical field?

Alternating Current and Direct Current
A Rock Band from Australia
Average Current and Discharged Capacitor
Atlantic City and District of Columbia

Correct Answer

A. Alternating Current and Direct Current

Explanation

AC and DC stand for Alternating Current and Direct Current in the electrical field. Alternating Current refers to the flow of electric charge that periodically reverses direction, commonly used in household electricity. Direct Current, on the other hand, refers to the flow of electric charge in only one direction, commonly used in batteries and electronic devices.

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4.

An exceedingly hot wind from the Sahara Desert that blows into Egypt (usually) in the spring.

Kieselguhr
Ketone
Khamsin
Kettle

Correct Answer

A. Khamsin

Explanation

The correct answer is "khamsin." Khamsin is an exceedingly hot wind that blows into Egypt, typically in the spring, from the Sahara Desert. It is a dry and dusty wind that can cause sandstorms and high temperatures.

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5.

Araneology is the branch of science deals in?

The study of spiders
The study of lizards
The study of tigers

Correct Answer

A. The study of spiders

Explanation

Araneology is the branch of science that deals with the study of spiders. This field focuses on various aspects of spiders, including their taxonomy, anatomy, behavior, ecology, and evolution. Araneologists study different species of spiders, their habitats, feeding habits, reproduction, and their role in ecosystems. They also investigate the venom and silk production of spiders, as well as their interactions with other organisms. By understanding spiders, araneologists contribute to our knowledge of biodiversity, ecological relationships, and the development of potential applications in medicine and technology.

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1

6.

Ceramics is the branch of science deals in?

The art and technology of making objects from clay
The art of climbing
The art of moving fast

Correct Answer

A. The art and technology of making objects from clay

Explanation

Ceramics is the branch of science that focuses on the art and technology of creating objects using clay. This field involves various techniques such as shaping, molding, firing, and glazing clay to produce functional or decorative items. It encompasses a wide range of applications, from pottery and sculpture to tiles and porcelain. The study of ceramics involves understanding the properties of clay, its behavior during firing, and the various techniques used to manipulate it.

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1

7.

Scientists recently found the treatment for Glaucoma in rats. Glaucoma is an __ disease.

Eye
Ear
Lung
Skin

Correct Answer

A. Eye

Explanation

Glaucoma is an eye disease, as mentioned in the question. Scientists have discovered a treatment for Glaucoma in rats, which implies that the disease affects the eyes of these animals. Therefore, the correct answer is "Eye."

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8.

Indian black eagle was spotted in the Aravali Biodiversity park after a gap of __ years.

90
80
70
60

Correct Answer

A. 90

Explanation

The Indian black eagle was recently seen in the Aravali Biodiversity Park after a period of 90 years. This suggests that the species has not been sighted in this particular area for almost a century. The sighting of the eagle after such a long gap indicates a positive change in the park's ecosystem and conservation efforts, allowing the bird to return to its natural habitat.

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9.

Deficiency of which Vitamin can cause Scurvy ?

Vitamin A
Vitamin B
Vitamin C
Vitamin D

Correct Answer

A. Vitamin C

Explanation

Deficiency of Vitamin C can cause scurvy. Scurvy is a disease characterized by weakness, anemia, gum disease, and skin hemorrhages. Vitamin C is essential for the synthesis of collagen, a protein that helps in the formation of connective tissues, blood vessels, and wound healing. Without enough Vitamin C, the body is unable to produce collagen, leading to the breakdown of connective tissues and the symptoms of scurvy. Vitamin A, Vitamin B, and Vitamin D deficiencies do not cause scurvy.

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10.

Angelology is the branch of science deals in?

That deals with the Study of Blood Vascular System
That deals with the study of blood cells
That deals with solar ellipse

Correct Answer

A. That deals with the Study of Blood Vascular System

Explanation

Angelology is not the branch of science that deals with the study of blood cells or solar ellipse. It is the branch of science that deals with the study of the blood vascular system.

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Jagran Josh Science Quiz

Astronautics is the branch of science deals in?

Quiz Preview

What was the active medium used in the first working laser ever constructed?

What does AC and DC stand for in the electrical field?

An exceedingly hot wind from the Sahara Desert that blows into Egypt (usually) in the spring.

Araneology is the branch of science deals in?

Ceramics is the branch of science deals in?

Scientists recently found the treatment for Glaucoma in rats. Glaucoma is an __ disease.

Indian black eagle was spotted in the Aravali Biodiversity park after a gap of __ years.

Deficiency of which Vitamin can cause Scurvy ?

Angelology is the branch of science deals in?