Question

two resistors of resistance 10ohm and 15ohm are to be connected to a battery of E. M. F 12V .
i)minimum current
ii) maximum current
a) describe the mode of connecting the resistance in each case.
b) calculate the strength of the total current in the circuit in each case. ​

Answer 1

Explanation:

(a) (i) For minimum current we must make R maximum. This can be done by connecting the resistances in series.

(ii) For maximum current we must make R minimum. This can be done by connecting the resistances in parallel.

(b) (i)Req=R1+R2=5+10=15Ω

I=ReqV=156=0.4A

(ii) Req=R1+R2R1R2=5+105×10=3.33Ω

I=ReqV=3.336=1.8A

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