a) Why we use of strong magnet inour Experimental Labs? b) Where is the biggest

Question

a)      Why we use of strong magnet inour Experimental Labs?

b)     Where is the biggest magnet in theuniverse and what is the strength of its magnetic field?

c)      Discuss the difference betweenan emf and a potential difference.

d)     A metel bar is to be used as aresistor. Its dimensions are by 4 by 10 units. To get the smallestresistance from this bar, one should attach leads to the oppositesides that have the dimension of (a) 2 by units (b) 2 by 10 units(c) 4 by 10 units. (d) All connections will give the sameresistance (e) None of the above is correct. Explain your point ofview.

Explanation / Answer

Given : We use strong magnet in our labs to get the accuratevalues in experiments and investigate the inner working ofmaterials.                Earth's magnetic field is similar to a giant bar magnet. There is anorth and south pole with magnetic lines of force surrounding theplanet. The field lines indicate the direction and strength of thefield at any point and run from north to south. I hope this information helps you                Earth's magnetic field is similar to a giant bar magnet. There is anorth and south pole with magnetic lines of force surrounding theplanet. The field lines indicate the direction and strength of thefield at any point and run from north to south. I hope this information helps you

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