Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die ?

  1. Edwin Hubble

  2. S. Chandrashekhar

  3. Stephen Hawking

  4. Steven Weinberg
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

S. Chandrashekhar (Subrahmanyan Chandrasekhar) calculated the mass limit (1.44 solar masses) for white dwarf formation, now known as the Chandrasekhar Limit. He won the Nobel Prize in Physics in 1983 for this work. Hubble, Hawking, and Weinberg made contributions in other areas of cosmology.

Multiple choice general knowledge science & technology

Barometer is used for

  1. relative humidity

  2. flow rate

  3. atmospheric temperature

  4. atmospheric pressure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A barometer is a scientific instrument used to measure atmospheric pressure. It helps in weather forecasting as pressure changes indicate approaching weather systems. Other options measure different quantities - hygrometer (humidity), flowmeter (flow rate), thermometer (temperature).

Multiple choice general knowledge science & technology

What is the definition of poisons ratio.

  1. ration of lateral strain to longitudinal strain

  2. ration of logitudinal strain to lateral strain

  3. product of lateral and longitudinal strain

  4. sq root of ration of lateral strain to longitudinal strain
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Poisson's ratio is defined as the negative ratio of lateral (transverse) strain to longitudinal (axial) strain under uniaxial loading.

Multiple choice general knowledge science & technology

birth place of Jaguar Cars?

  1. Spain

  2. Germany

  3. England

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

Jaguar Cars was founded in 1922 as the Swallow Sidecar Company in Blackpool, England, and later renamed Jaguar. The company has always been British, though it was owned by Ford from 1990 to 2008 and is now owned by Tata Motors of India. The manufacturing and headquarters remain in England.

Multiple choice general knowledge science & technology

If a disc is rotating with a angular velocity of w radians per sec. What is the speed of the disc in RPM.

  1. ( 2 x pi x w)/ 60

  2. (60 x w)/(2 x pi)

  3. 2 x pi x w

  4. w x 60
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To convert from radians per second to RPM, multiply by 60 (to get radians per minute) and divide by 2pi (since one revolution is 2pi radians). RPM = (w × 60) / (2pi). Option A would give radians per hour, while options C and D are incomplete conversions.

Multiple choice general knowledge science & technology

What is the arc length of a segment having included angle theta in radians and radius “R”?

  1. 2 pi R Theta

  2. R x R x Theta

  3. R x theta/ (2 pi)

  4. R x theta
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The formula for arc length when angle is in radians is s = R × theta, where theta is the angle in radians. This is because the definition of radian measure comes from arc length divided by radius. Option A would give circumference multiplied by angle, while option B incorrectly squares the radius.

Multiple choice general knowledge science & technology

Name the car company which gave patent rights to make Premier padmini???

  1. Chrysler

  2. Nissan

  3. Maruti

  4. Fiat
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Premier Padmini was based on the Fiat 1100, and Premier Automobiles Limited had a license agreement with Fiat to manufacture these cars in India. The Fiat 1100 was first introduced in India in 1964 and was later branded as the Premier Padmini. It became one of the most popular cars in India for several decades.