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ICSE Class 8 Answered

Electric current flowing through a circuit is inversely proportional to resistance.When the resistance is 2 ohms,current is 3 amperes.Find the following:- (a)The resistance when the current flow is 0.5,1.2 and 2 amperes respcctively. (b)The current flow in a circuit when the resistance is 1.2,2.4 and 30 ohms respectively
Asked by nathsantanukumar | 09 May, 2018, 06:02: PM
answered-by-expert Expert Answer
Current I flowing in the circuit is inversely proportioanal to Resistance R.
 
So we can write I = K/R ......................(1)
where K is constant
 
we are given that when resistance is 2 ohms , current is 3 Amp.  By substituting values for current and resistance in eqn.(1), we get K = 6
 
hence we re write ean.(1) as I = 6/R .................(2)
 
when current is given use eqn.(2) to get resistance. Similarly when resistance is given use eqn.(2) to get current
Answered by Thiyagarajan K | 10 May, 2018, 12:45: PM
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