(A): Magnetic force can be attractive or repulsive in nature. (B): The closer a piece of iron is to a magnet, the stronger is the attraction. Which one of the following is correct?
(A) is an inference and (B) is an observation
Statement (A) says that magnetic force can be attractive or repulsive in nature. This is a general classification of the force drawn from many trials with different objects and poles, going beyond any single sensory observation — it is a generalised conclusion drawn from a pattern of observations, which makes it an inference.
Statement (B) says that the closer a piece of iron is to a magnet, the stronger the attraction. This is something a person can directly notice while carrying out the activity — moving a piece of iron towards a magnet and seeing or feeling the pull get stronger — which makes it a direct observation.
Hence, (A) is an inference and (B) is an observation.
Similar Questions
Which of the following is not true about a model?
(A): These are pieces of discrete information sustained through evidence - observation and measurement.
(B): There are derived from generalization of observations and experiences.
Which one of the following is correct?
S1: Scientific knowledge is value neutral.
S2: Nuclear energy is used for making nuclear bombs.
Which one of the following is correct?
From the following, identify the statement that is true about science.
Important Questions from Nature and Structure of Science
What involves two cell divisions during which the chromosome number is halved?
In which stage, science should be introduced as separate disciplines with emphasis on experiments / technology and problem solving?
In which year did E. L. Thorndike develop the theory of trial and error learning?
Under which organisation's aided project did NCERT develop an instructional material titled "Science is Doing"?
- Read the excerpt given below and answer the question.
French scientist Henri Becquerel was working on phosphorescent materials, which glow in the
dark after exposure to light. He believed that sunlight was the reason that the crystal would burn
its image on a photographic plate. On a stormy day in $1896$, he decided to leave it for few days
and resume his experiments later. A few days later, he took his crystal out of a darkened drawer.
He noticed that the image burned on the plate was 'fogged' which meant that the crystal had still
emitted rays, despite the lack of sunlight.
What does the above excerpt illustrate about science ?
