Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

Television

  1. Herbert E. Ives

  2. Philo Farnsworth

  3. Kálmán Tihanyi

  4. John Logie Baird
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Philo Farnsworth is credited as the inventor of the first fully electronic television system. He developed the image dissector tube and demonstrated electronic television in 1927, making significant contributions to television technology.

Multiple choice general knowledge science & technology

The dimension for 1 Newton unit is

  1. (kg) (m/s^2)

  2. (g)(m/s^2)

  3. (kg)(km/h^2)

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

Newton is defined as the force required to accelerate 1 kilogram at 1 m/s² in the direction of applied force. By dimensional analysis: F = ma, so [N] = [M][L][T]⁻² = kg·m/s². Option A correctly shows this.

Multiple choice general knowledge science & technology

If an element F has mass number as 19 and atomic number as 9 then what are the number of protons and neutrons that it contains respectively .

  1. Protons = 10 , Neutrons = 9

  2. Protons = 9 , Neutrons = 19

  3. Protons = 9 , Neutrons = 10

  4. Neutrons =9 , Protons = 19
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In an atom, the atomic number equals the number of protons. Mass number equals protons + neutrons. For element F with atomic number 9 and mass number 19: protons = 9, neutrons = 19-9 = 10. Option C is correct.

Multiple choice general knowledge science & technology

If V = I * R , then which among these is true .

  1. R is directly proportional to I

  2. I is inversely proportional to V

  3. I is directly proportional to V

  4. V is inversely proportional to I
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

From V = IR, if R is constant, then I = V/R means current is directly proportional to voltage. Increase voltage and current increases proportionally. Options A and B are incorrect; I and V are directly related, not inversely.

Multiple choice general knowledge science & technology

What is the molecular formula for alkynes

  1. CnH2n

  2. CnH2n+2

  3. CnHn

  4. CnH2n-2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The general molecular formula for alkynes is CnH2n-2, where n is the number of carbon atoms. This is because alkynes contain a triple bond, which reduces the hydrogen count by 4 compared to alkanes (CnH2n+2). Option A (CnH2n) is the formula for cycloalkanes or alkenes. Option B (CnH2n+2) is for alkanes. Option C (CnHn) is not a standard hydrocarbon formula.

Multiple choice general knowledge science & technology

If you have the H5N1 virus inside you then you are inflicted with..

  1. bird flu

  2. swine flu

  3. AIDS

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

H5N1 is the scientific designation for the avian influenza virus, commonly known as bird flu (Option A). It primarily affects birds but can infect humans. Option B (swine flu) is H1N1. Option C (AIDS) is caused by HIV. Option D (Jaundice) is a liver condition, not a viral infection by this name.

Multiple choice general knowledge science & technology

What is the shortest day of the year known as:

  1. Spring Equinox

  2. Winter Solistice

  3. Autumn Equinox

  4. Summer Solistice
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Winter Solstice (around December 21-22 in the Northern Hemisphere) marks the shortest day of the year when the sun is at its lowest point in the sky. Option B is correct, though 'Solistice' is misspelled (should be Solstice). Equinoxes (A and C) mark equal day and night, while Summer Solstice is the longest day.

Multiple choice general knowledge science & technology

The world's first successful kidney transplant was performed by physicians affiliated with what university

  1. University of Michigan

  2. Princeton

  3. Harvard

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

The world's first successful kidney transplant was performed in 1954 by Dr. Joseph Murray and his team at Harvard University's Peter Bent Brigham Hospital in Boston. The surgery was between identical twins. Option C (Harvard) is correct. This was a groundbreaking medical achievement that earned Murray the Nobel Prize.