1.

Name and define S.l. unit of resistance. Calculate the resistance of a resisto:r if the current flowing through it is 200 mA, when the applied potential difference is 0.8 V.

Answer»

Solution :The SI unit of resistanre is ohm. One ohm is the RESISTANCE offered by a CONDUCTOR when the CURRENT passing through it is one AMPERE and the POTENTIAL difference across its ends is one volt.
By Ohm.s law V = IR
`R=(V)/(I) =(0.8V)/(0.2A) =4 ` ohm


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