Question: A 250-V, 4-pole, wave-wound d.c. series motor has 782 conductors on itsarmature. It has armature and series field resistance of 0.75 ohm. The motor takesa current of 40 A. Estimate its speed and gross torque developed if it has a flux per pole of 25 mWb Answer: Step 1 Mechanical Engineering homework question answer, step 1, image 1 Mechanical Engineering homework question answer, step 1, image 2 Step 2 Mechanical Engineering homework question answer, step 2, image 1 Step 3 Mechanical Engineering homework question answer, step 3, image 1

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 Scientific research has some distinguished characteristics. They are known as the hallmarks of scientific research. They are as follows:

1. Testability : the hypothesis developed must be testable with the help of various test tools
2. Replicability : the results of the similar type of research can be used repeatedly to support the research
3. Purposiveness : the research must be started for a specific purpose or aim
4. Rigor : the research must be backed by strong theory and methodology
5. Precision and Confidence : the conclusions drawn must be precise so that there will be confidence that the estimations are correct
6. Parsimony : the research framework must be based on fewer variables and data so that economy of the research is ensured
7. Objectivity : the results after interpreting the data must be based on the facts of research, that is objective
8. Generalisability : the findings of the research must be generalizable in nature.

The salient features of scientific inquiry are:

• There will be questions which can be investigated empirically
• Gives priority to evidence in all responses
• The explanations are formulated from evidence
• The methods used permit direct investigation of the research
• The explanations are connected with scientific knowledge and communicated