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Question 3805

The time period of a pendulum when taken to the Moon would:

Aremain the same

Bdecrease

Cbecome zero

Dincrease

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D. increaseExplanation: The time period of a simple pendulum is given by the formula T = 2π√(L/g), where L is the length of the pendulum and g is the acceleration due to gravity. Since the Moon’s gravity is about 1/6th of Earth’s, the value of g decreases, causing the time period to increase.

Question 3804

The longest bone in the human body is:

AUlna

BHumerus

CFemur

DTibia

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C. FemurExplanation: The femur is the single bone of the thigh region and extends from the hip joint to the knee joint. It supports the body’s weight during standing, walking, and running. The femur is the longest, heaviest, and strongest bone in the human skeleton. It articulates with the pelvic girdle at its proximal end (head of femur fits into the acetabulum of the pelvis) and with the tibia and patella at the distal end. Average Length: Approximately 45 cm (about 1/4 of body height).

Question 3803

Saliva helps in the digestion of:

Afats

Bstarch

Cproteins

Dvitamins

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B. starchExplanation: Saliva, secreted by the salivary glands, begins the process of carbohydrate digestion in the mouth. It contains the enzyme salivary amylase (also known as ptyalin), which catalyzes the breakdown of starch (polysaccharide) into maltose (disaccharide). This is the first step in digestion, and it occurs while food is chewed and mixed with saliva before being swallowed. Chemical Reaction: Starch → (Salivary amylase) → Maltose Thus, saliva plays an essential role in the digestion of carbohydrates, making the food slightly sweet when chewed for a longer time.

Question 3802

Ringworm is a ___________ disease.

Abacterial

Bprotozoan

Cviral

Dfungal

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D. fungalExplanation: Ringworm (also known as Dermatophytosis or Tinea infection) is a fungal skin disease. It appears as red, circular, itchy patches on the skin, scalp, or nails. Despite its name, it is not caused by a worm but by a fungus that grows on keratinized tissues such as skin, hair, and nails. The disease spreads through direct contact with infected individuals, animals, or contaminated objects. Common Types: Tinea capitis: Ringworm of the scalp Tinea corporis: Ringworm of the body Tinea pedis: Athlete’s foot (infection of feet) Tinea cruris: Jock itch (infection of groin area)

Question 3801

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by:

Amercury

Blead

Ciron

Darsenic

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B. leadExplanation: Bullets are typically made of lead or lead alloys because lead is dense and malleable. When bullets remain lodged in the body, they can corrode over time and release lead ions into surrounding tissues and blood, resulting in chronic lead poisoning (plumbism). Symptoms include abdominal pain, anemia, fatigue, headache, irritability, and neurological disorders. In severe cases, it may cause kidney and brain damage. Prevention: Complete removal of bullet fragments and regular monitoring of blood lead levels in affected individuals are essential to prevent toxicity.

Question 3800

What happens to a person who receives the wrong type of blood?

Aall the arteries constrict

Ball the arteries dialate

Cthe RBCs agglutinate

Dthe spleen and lymph nodes deteriorate

Show answer

C. the RBCs agglutinateExplanation: In an incompatible blood transfusion, the antibodies in the recipient’s plasma bind to the antigens on the donor’s RBCs. This causes the red blood cells to agglutinate (clump together) and eventually undergo hemolysis (bursting). The released hemoglobin can block kidney tubules and cause kidney failure, which can be fatal if untreated. This is why blood group compatibility testing (cross-matching) is essential before transfusions. Example: If a person with blood group B (having anti-A antibodies) receives blood from a person with group A (which has A antigens), the recipient’s anti-A antibodies will attack the donor’s RBCs, leading to agglutination.

Question 3799

Angle of friction and angle of repose are:

Aequal to each other

Bnot equal to each other

Cproportion to each other

Dnone of the above

Show answer

A. equal to each otherExplanation: The angle of friction and the angle of repose are equal to each other. The angle of friction is the angle made by the resultant of the limiting friction and normal reaction with the normal force, while the angle of repose is the maximum angle of an inclined plane at which an object just begins to slide. Both represent the same physical condition of impending motion.

Question 3798

Which of the following is not a nucleon?

Aproton

Bneutron

Celectron

Dpositron

Show answer

D. positronExplanation: Nucleons are the particles that make up the nucleus of an atom — namely, protons and neutrons. A positron is not a nucleon; it is the antiparticle of the electron, having the same mass as an electron but a positive charge, and exists outside the nucleus.

Question 3797

The acceleration due to gravity at the equator:

Ais less than that at the poles

Bis greater than that at the poles

Cis equal to that at the poles

Ddoes not depend on the earth's centripetal acceleration

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A. is less than that at the polesExplanation not yet available.

Question 3796

The isotope used for the production of atomic energy is:

AU-235

BU-238

CU-234

DU-236

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A. U-235Explanation: Uranium-235 (U-235) is the isotope used for the production of atomic energy because it is fissionable. When bombarded with neutrons, U-235 undergoes nuclear fission, releasing a large amount of energy along with additional neutrons, which sustain the chain reaction in nuclear reactors and atomic bombs.

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Science

The time period of a pendulum when taken to the Moon would:

The longest bone in the human body is:

Saliva helps in the digestion of:

Ringworm is a ___________ disease.

If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by:

What happens to a person who receives the wrong type of blood?

Angle of friction and angle of repose are:

Which of the following is not a nucleon?

The acceleration due to gravity at the equator:

The isotope used for the production of atomic energy is:

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